Moparts

How rare is a 8 3/4" 2.76 sure grip?

Posted By: Pale_Roader

How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 01:47 AM


In a 489 or 742 case (big pinion). I had to sell my last sure grip with my Charger and now need one for the Challenger. I have a 2.76 open (489) for now, but i need the sure grip. I have never seen a 2.76 sure grip in this case/pinion size, only 741.

Did they not make them or did they just all get gear-swapped for better gears..???

Also, were there ever any aftermarket gear sets with higher gears for the 8 3/4"...??? I mean 2.5's or ???
Posted By: Slider

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 01:59 AM

I just read this info in the Tech Archives...

http://www.moparts.org/Tech/Archive/axle/22.html

It looks like 3.91 may be the limit for a 8.75 sure grip. 8.25 had a 2.76 sure grip though...
Posted By: blewbyu

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:22 AM

Quote:


In a 489 or 742 case (big pinion). I had to sell my last sure grip with my Charger and now need one for the Challenger. I have a 2.76 open (489) for now, but i need the sure grip. I have never seen a 2.76 sure grip in this case/pinion size, only 741.

Did they not make them or did they just all get gear-swapped for better gears..???

Also, were there ever any aftermarket gear sets with higher gears for the 8 3/4"...??? I mean 2.5's or ???



I pulled a 2.76 sure grip from a 66 c body and it was a 742 case
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:40 AM

Quote:




Also, were there ever any aftermarket gear sets with higher gears for the 8 3/4"...??? I mean 2.5's or ???



Whatchoo' mean is lower ..... there was a 2.41 built for a 42 housing ...way-back-when.
Posted By: 340SHORTY

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:44 AM

Quote:

Quote:




Also, were there ever any aftermarket gear sets with higher gears for the 8 3/4"...??? I mean 2.5's or ???



Whatchoo' mean is lower ..... there was a 2.41 built for a 42 housing ...way-back-when.



oh oh a 2.41 is a high ratio,, a 3.91 is a lower ratio...
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:49 AM

Hay shorty ... a 2.41 is short ... and a 3.91 is tall.

YOU should know the diff ..
Posted By: MoparforLife

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:57 AM

There were many different ratio's used with sure grip from the factory from at least 2.76 to 4.10. Loyd of 3.23's and 3.55's were out there.
Posted By: 340duster340

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 03:20 AM

i have one sitting in my garage, came out of a 70 chrysler 300
Posted By: J_BODY

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 03:21 AM

I pulled one out of an old highway patrol car up in NoDak long ago.
Posted By: 340SHORTY

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:23 AM

Quote:

Hay shorty ... a 2.41 is short ... and a 3.91 is tall.

YOU should know the diff ..



Sorry Doc,,, my edumacachun learnd me that

a 2.41 is a tall gear as in hi speed on the highway

a 3.91 is a low gear,, good drag gear for quick acceleration ..

in other words a 2.41 is a horrible drag race gear but is great for cruising

a 3.91 is a good drag race gear but not highway friendly..
Posted By: Kern Dog

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:30 AM

Doc, I like you and all, but you are in the minority on this one. You are the only one that I have ever heard refer to gears this way.
Short, low, digger, deep gears = 3.91 and numerically higher.
Tall, long, highway, freeway gears = 2.76, 2.93 etc.
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:40 AM

Short gears = numerically higher.
Tall gears = numerically lower.
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:59 AM

Deleted by the HKMTBC
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 05:05 AM

Quote:

Short gears = numerically lower.
Tall gears = numerically higher.



Fixed ....FINALLY ....
Posted By: Twostick

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 05:11 AM

A car with a 2.76 gear would be considered long legged as in can run real fast and last time I checked, most long legged creatures are TALL compared to short legged creatures. Not that this will change the Doc's mind. I think he just does it to

As to the OP, my 66 New Yorker came with a 2.76 SG but it was a 741 case.

Kevin
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 05:26 AM

MOST of you were in your crib and loading-up yurr diapers when I was running a 2.76 gear out on the freeways of Detroit on Thursday nites ...

I know what is short and what is TALL ... but if youz guyz want to call an apple and orange ... Oh-TAY by me.

And to that CrEaTuRe from cAnAdA .... put the pipe down !
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 05:39 AM

Quote:

MOST of you were in your crib and loading-up yurr diapers when I was running a 2.76 gear out on the freeways of Detroit on Thursday nites ...

I know what is short and what is TALL ... but if youz guyz want to call an apple and orange ... Oh-TAY by me.

And to that CrEaTuRe from cAnAdA .... put the pipe down !



Just because you are old,does not mean you are right....
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 05:50 AM

Quote:



Just because you are old,does not mean you are right....



NO ...all it-is is just a way something is described. YOU want to call a gear (that is short numerically) TALL .... fine with me.

But PLEASE don't confuse our nice-neighbors north-of-the-border anymore than they already are ...
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:03 AM

Quote:

Quote:



Just because you are old,does not mean you are right....



NO ...all it-is is just a way something is described. YOU want to call a gear (that is short numerically) TALL .... fine with me.

But PLEASE don't confuse our nice-neighbors north-of-the-border anymore than they already are ...



Its not that I want to call it one way or the other,its the right way to describe it. Tought to me by mechanics,racers,shop teacher,and others. Guess we are all wrong,you are the first person I have ever seen describe them that way.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:21 AM

OK ...let me make it EZ for you ..... Here we have TWO #'s ..... 222 and 444.

WHICH # is more numerically bigger, larger .... aka taller ?

Now if you want to "corrupt" that reasoning to mean the opposite .... lite-up another

I know what you are trying to say ... I have been dealing with this MORE TIMES than just here .... BUT THIS is just like what they do to us in the voting-booth sometimes ... they have us voting YES on a ballot ... if we don't want it to pass.

...
Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:38 AM

Quote:

Doc, I like you and all, but you are in the minority on this one. You are the only one that I have ever heard refer to gears this way.
Short, low, digger, deep gears = 3.91 and numerically higher.
Tall, long, highway, freeway gears = 2.76, 2.93 etc.



Rear axles are named the same way as transmissions. In transmissions, the "Low" gears are the higher numbers 3.09, 2.66, 2.74, 2.45, etc. "High" gears are the lower #'s, as in 1.0, .70, .67, etc.

Same thing for the rear axles - low or short gears are 5.13, 4.56, 4.30, 4.11, etc.
High or tall is 2.45, 2.71, 2.76, 2.94, etc.
Posted By: 1_WILD_RT

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:43 AM

Never argue with a fool - they will drag you down to their level, then beat you with experience.
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:43 AM

Quote:

OK ...let me make it EZ for you ..... Here we have TWO #'s ..... 222 and 444.

WHICH # is more numerically bigger, larger .... aka taller ?

Now if you want to "corrupt" that reasoning to mean the opposite .... lite-up another

I know what you are trying to say ... I have been dealing with this MORE TIMES than just here .... BUT THIS is just like what they do to us in the voting-booth sometimes ... they have us voting YES on a ballot ... if we don't want it to pass.

...



The reason you "deal" with this all the time is because you are wrong. I understand why you think you are right,but you are wrong.
Posted By: WILD BILL

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:45 AM

Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:49 AM

What flavor?
Posted By: WILD BILL

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:52 AM

Quote:

What flavor?



Does it really matter. It's Ice Cream

Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:56 AM

Quote:

Quote:

What flavor?



Does it really matter. It's Ice Cream





Ummm, it might matter.

Attached picture 6825711-ht_schweddy_balls_ice_cream_flavor_ll_110908_wblog.jpg
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:57 AM

I almost went with I like ice cream
Posted By: DoctorDiff

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:58 AM

2.76 ratio: "high" speed gear

4.88 ratio: "low" speed gear

Transmission: "low gear" first gear

Transmission: "high gear" overdrive

Transfer case: "low range, compound low" low speed

Transfer case: "high range" high speed
Posted By: 340SHORTY

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:59 AM

Boy,,, I gotta quit opening that can of worms unless Im going fishing
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 07:17 AM

Quote:

I almost went with I like ice cream



.... and THAT would make you way-more CORRECT than your other statements ... ..
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 07:32 AM

Quote:



The reason you "deal" with this all the time is because you are wrong. I understand why you think you are right,but you are wrong.



Hay Jared ... go-make-me a Subway sandwich !

And I did not say I deal with this all-the-time .... GET IT RIGHT ....... Newbie ! ...and I will bet that you are still IN diapers.

And with the names Nirvana & Playboy ? ....oh yeah big-shot wannabe' ...take a wiff ..
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 07:45 AM

Quote:

2.76 ratio: "high" speed gear

4.88 ratio: "low" speed gear





I will accept this ......

A label of low or high SPEED gear ... but don't attach the word RATIO to it ... and THAT is what we are talking about here.

And Jared ...Xtra cheese on mine ..
Posted By: BossRide

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:03 AM

Not to throw a wrench into things, but I've always thought and heard that the difference was in relation to the engine RPMS at a certain speed.... hence a "low" geared 2.76 is only turning a low RPM of say, 2800.. where a "higher", steeper geared 4.11 is in the upper, higher RPM range near the redline...

High geared cars climb the tach faster, low geared cars climb the tach slower... But.. a TALL geared car has the 2.76 because it runs out faster like running with longer legs... mad max-style. A Short geared car runs out of steam quickly, like running with short legs.. 1/8th mile warrior.

so there is an opposite in the terminology... Low and tall and high and short...

But "High Gear" in relation to *gears* like first through fourth comes from old two-speed transmissions, in relation to the speed. Rabbit and Turtle...
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:10 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:16 AM

Quote:



Hahahaha man that is a good joke,I have never heard that one before. Did you just make that up? Whew that is rich,man you must be a genius.

My favorite band is Nirvana,hence the name.I am such a big shot wanna be,you got me,I drive a 4 door slant six dart,and I like grunge bands,whew im such a poser.

I like how you go for the personal attack when someone points out the fact that you are wrong. You claim to be an old man,yet you act like a child.



I thought you were DONE .... Mr wannabe' Playboy ....

And YOU are WRONG based on DD's explanation ....

... and I will have Xtra mayo on my sandwich too !
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:18 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:27 AM

Quote:

I am done trying to convince you. I bet you want extra mayo,sorry I dont swing that way.



You were "done" when you came on this topic .... helleva way for for a newbie to start-out on a site.

Mayo ? ...swing-that-way? .... is that some-sort-of Nirvana "speak" ?
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:33 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:35 AM

And you are NEITHER clever or entertaining ....
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:37 AM

Yet you keep responding.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:43 AM

HERES a response for ya' ...
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:45 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:47 AM

Quote:

HERES a response for ya' ...

Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:48 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:55 AM

Since NOTHING informative, interesting, entertaining or clever is coming from the little-bitty TROLL in diapers from Texazz .....

I am DONE HERE ... to anything else he posts.

But carry-on TROLLster ... your mommy soon might be taking your 'puter privileges away.
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? *DELETED* - 09/14/11 08:58 AM

Post deleted by Nirvana
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 09:01 AM

DAMN ...did someone in here ?
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 09:01 AM

Quote:

Since I never post NOTHING informative, interesting, entertaining or clever .....

I am DONE HERE ... my mom says I have to get off the computer or she wont tuck me in,and change my depends.

But carry-on Master ... you are awesome.




FIxed it for ya
Posted By: Pale_Roader

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 10:41 AM

Quote:

there was a 2.41 built for a 42 housing ...way-back-when.



First i've heard ov this...??? I've read stacks... hundreds and hundreds ov Mopar mags and browsed years ov Moparts, never heard ov that. Anyone else confirm...??? I suppose it'd be easier to find a cheap 426 Hemi than one ov these gearsets though...

As for the rest ov this thread... Here i am thinking 'wow... three pages ov info...' Nope, just that stupid argument again. Rest it.

I guess they exist... the big case 2.76 sure grips... I'd sure like to find one. I was gonna stuff some 2.76 gears into my 3.23 489 case if it came down to it, but that car sold.
Posted By: MoparforLife

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 01:42 PM

Quote:

2.76 ratio: "high" speed gear

4.88 ratio: "low" speed gear

Transmission: "low gear" first gear

Transmission: "high gear" overdrive

Transfer case: "low range, compound low" low speed

Transfer case: "high range" high speed


This is the way I learned it 50+ years ago. It has held true all these years
Posted By: JohnRR

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 01:47 PM

All I see is a lot of this ...

*** You are ignoring this user ***

makes the thread a little confusing though ....
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 02:17 PM

Quote:

All I see is a lot of this ...

*** You are ignoring this user ***

makes the thread a little confusing though ....



Thank you,I didnt know you can ignore people here,just did. Sorry to the OP for the clutter.
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 03:48 PM

Deleted by the HKMTBC

MikeR
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:05 PM

Deleted by the HKMTBC
Posted By: mopar_man

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 04:31 PM

Not one of you guys explained the "gear" thing correct !!!

My take on it but

Ratio is comparing one number to another .

So if you have 4.11 gears .....they are low gears but high ratio (relatively speaking)
If you have 2.76s , you have high gears and low ratio.
Why????
Because when you say you have 4.11 gears it means 4;11 to 1
or for every time your axle turns once your drive shaft turns 4:11 times........
If you have 2:76s .... axle turns once and drive shaft turns 2:76 times

Conclusion : Low gears = high ratio
High gears = low ratio

Posted By: DPelletier

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:43 PM

Quote:

Not one of you guys explained the "gear" thing correct !!!

My take on it but

Ratio is comparing one number to another .

So if you have 4.11 gears .....they are low gears but high ratio (relatively speaking)
If you have 2.76s , you have high gears and low ratio.
Why????
Because when you say you have 4.11 gears it means 4;11 to 1
or for every time your axle turns once your drive shaft turns 4:11 times........
If you have 2:76s .... axle turns once and drive shaft turns 2:76 times

Conclusion : Low gears = high ratio
High gears = low ratio






The ratio thing just confuses people. All you need to know;

2.41's = high gears = tall gears.

3.91's = low gears = short gears

Dave
Posted By: DPelletier

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 06:44 PM

Quote:

All I see is a lot of this ...

*** You are ignoring this user ***

makes the thread a little confusing though ....



...don't you hate it when that happens!!


Dave
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 07:01 PM

Quote:




The ratio thing just confuses people. All you need to know;

2.41's = high gears = tall gears.

3.91's = low gears = short gears

Dave



Ahhh DP .... now WE should take your word on this ? ... and on your second post ADMITTING confusion ..... and you being from B C ?

Being Confused ! ....

I to DD's terminology .... a 2.76 gear is a HIGH SPEED gear.

Now ...BACK IN yurr closet !
Posted By: DPelletier

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 07:39 PM

Quote:

Ahhh DP .... now WE should take your word on this ? ...



Absolutely.



Dave
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:00 PM

Deleted by the HKMTBC
Posted By: Sixgun

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:04 PM

I personally have 2 '489 carriers out of big cars (Cs)2.76 sure grip.Never seen a 2.41, but my ex GFs
LeBaron had 2.20s in the 8&1/4.

P.S A-12, Nice Pic.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 08:15 PM

I have never actually seen a 2.41 gear me-self. I saw one at an auction or sale listing some years back ... I think it was when Petty was selling out all of his Mopar stuff.
Posted By: jcc

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 09:15 PM

Quote:

I have never actually seen a 2.41 gear me-self. I saw one at an auction or sale listing some years back ... I think it was when Petty was selling out all of his Mopar stuff.



If I saw one, I likely would buy it, and a 3.08 to boot.

Maybe slightly interesting, how many note that only odd tooth counts are used on gears and why?
Posted By: patrick

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 09:41 PM

Quote:

Hay shorty ... a 2.41 is short ... and a 3.91 is tall.

YOU should know the diff ..



only to you....to the rest of the universe, a 2.41:1 rear gear is a TALL (numerically low) gear, 4.10 is a SHORT (numerically high) gear...

look at it this way...LOW gear in a 727 is 2.45:1, while HIGH gear is 1:1

could get taller than 3.91's with SG's....I have an OEM chunk with a 3.55/SG in a 742 case....had an OEM 3.55/SG 489 case before it...most SG's with tall gears (2.94 and 2.76 mainly) most likely came in C bodies.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 10:03 PM

Quote:




If I saw one, I likely would buy it, and a 3.08 to boot.






So wood I ....

And to patrick .... ONLY to me ...and Double D ...
Posted By: Chi_Town_Runner

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/14/11 11:27 PM



Quote:

Maybe slightly interesting, how many note that only odd tooth counts are used on gears and why?




Not always odd count for both:

3:23
42 teeth ring
13 teeth pinion

4:57
32 teeth ring
7 teeth pinion

4:86
34 teeth ring
7 teeth pinion

As was explained to me once by an engineer:

The reason for having ratios that are in the decimals is that with each revolution a single tooth on the pinion will not contact the same tooth on the ring with every revolution.

The pinion tooth advances one tooth per revolution so that it will contact each tooth on the ring gear through numerous revolutions.

Hope I explained that correctly.

Frank
Posted By: Kern Dog

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 04:00 AM

Quote:

Never argue with a fool - they will drag you down to their level, then beat you with experience.



GREAT! I love it!
Another favorite: "I'd agree with you, but then we'd BOTH be wrong!"
Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 04:43 AM

Quote:



Quote:

Maybe slightly interesting, how many note that only odd tooth counts are used on gears and why?




Not always odd count for both:

3:23
42 teeth ring
13 teeth pinion

4:57
32 teeth ring
7 teeth pinion

4:86
34 teeth ring
7 teeth pinion

As was explained to me once by an engineer:

The reason for having ratios that are in the decimals is that with each revolution a single tooth on the pinion will not contact the same tooth on the ring with every revolution.

The pinion tooth advances one tooth per revolution so that it will contact each tooth on the ring gear through numerous revolutions.

Hope I explained that correctly.

Frank



Find another engineer.

There are repeating and non repeating patterns, not to mention the one tooth theory is wrong. I'm going to use Ford 9" ratios, since they are the most common.

A 3.00 is a common pickup gear and has a 13/39 tooth count. Each pinion tooth hits the same 3 teeth on the ring and is a repeating pattern. A 3.50 ratio has 10/35 and each pinion tooth hits the same 7 teeth during 2 rev's and is (semi) repeating.

As to the "one tooth" theory. A 3.08 ratio has 13/40 teeth and each pinion tooth is one tooth off, so after 3 pinion rev's it has went 39 teeth and is one tooth off the 40th tooth. A 3.23 ratio is 13/42 - again, after 3 rev's has went 39 teeth, but it is 3 teeth away. A 3.55 has 11/39 so 3 turns, 33 teeth, 6 off. Follow?
Posted By: HotRodDave

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 04:45 AM

A high gear is for high speed plain and simple and a low gear is for low speed. Doc needs to lay off the crack pipe.

I supose you start your transmission out in high gear and work your way to low gear when your really goin fast
Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 05:20 AM

Quote:

A high gear is for high speed plain and simple and a low gear is for low speed. Doc needs to lay off the crack pipe.

I supose you start your transmission out in high gear and work your way to low gear when your really goin fast



If he keeps that stuff up, "Doc Fiberglass" will get demoted to "Nurse Plastic"...
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 06:34 AM

... you s ... lay off the ....

The transmission inner gearing is way diff than the final drive rear-end ratio.

PLUS the resident Xpert here (Doc Diff) labels this whole deal as a 2.76 being a low-ratio BUT IS a high-speed gear. I will accept that ... but you just keep "hitting the pipe".

Well you can HITit by yurrself.
Posted By: Pale_Roader

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 09:52 AM

Quote:

All I see is a lot of this ...

*** You are ignoring this user ***

makes the thread a little confusing though ....



Hah! I guess that means you dont have me on that list then. Can you 'ignore' the original posters ov threads? That might get confusing. I dont use that feature, so i dont know how it works.

So yes, i guess i am looking for a 489 or 742 2.76 geared sure grip pig. That 68 Charger in Hotrod years back went 190mph on that pig with a '505HP' 440, so i guess it'll work for what i need. I'd still prefer something higher (numerically lower, for the topically-challenged), but i'm sure the 2.76's will bad hard enough on clutches as it is.

I now return you to your bickering. And for when this finally gets resolved i will say this: long rods make more power....

HAHAHAHAHAHAHAHAHAHAHA (groan... i've been here too long...)
Posted By: mopar_man

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:39 AM

Quote:

It's the difference between "drive" and "driven" regardless of the mode of power.......the pinion gear ring is the "driven" gear not the "drive" gear......hence the term "overdrive" (over, above, taller, higher.....)


MikeR



Everything from the flexplate or flywheel back is "driven"
However , we don't use the term in its correct meaning .
we could say the tranny is driven by the crankshaft
the "driveshaft is driven by the tranny
the diff is driven by the driveshaft but it would just complicate things more for the newer crowd that is just learning the mechanics of our automobiles.
Posted By: Aero426

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 03:12 PM

Quote:


Anyone know the ratios they used in super speedway Mopar NASCAR's back in the day?

Teams had racks of 8 3/4 center sections with different gears ready to go. There were many choices. In the area of 2.76 or 2.94 for Daytona and Talladega. We just switched my car from 3.23 to a 4.75 to make it easier to move around at low speeds because the tire diameter is so large. The 4.75 gear set installed was used in a different car on mile dirt like Springfield and DuQuoin.

Posted By: MoparforLife

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 03:51 PM

Not a big trick as the sure grips are interchangeable with all the cases as long as you use the proper side bearings. Buy a sure grip unit and bolt it in. There is always some in the classifieds or several other places.
Posted By: 70Cuda383

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 06:45 PM

Haven't you guys learned to not argue with the Doc? he's not always right, but he'll never admit he was wrong. yes, we all know that EVERYONE EXCEPT the doc, calls a 2.76 gear a "tall gear" and a 3.91 gear a "short gear"

he'll refuse to admit that, and will argue to the death that he's right.


Often times, it's best to let his comments go and ignore them.

I'm actually kind of surprised he hasn't told us about how perfect his car is and will run 12s and get 20 MPG with a 2.76 rear gear and a t-quad, and that the rest of us are all doing something wrong because we can't duplicate what he's doing.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 10:08 PM

Quote:



but he'll never admit he was wrong.

I'm actually kind of surprised he hasn't told us about how perfect his car is and will run 12s and get 20 MPG with a 2.76 rear gear and a t-quad, and that the rest of us are all doing something wrong because we can't duplicate what he's doing.



I am "WRONG" ? .... for calling a gear-ratio that is low numerically a "short gear" ? No ...I will not admit that I am "wrong". But I am BIG ENOUGH to admit I uNderstand the reasoning behind the opposite point-of-view or opinion. But then others here can not offer me the same consideration...

You allege that I have never admitted when I was wrong? ... there have been several instances over-the-years where I have mis-spoke or didn't have my facts right OR had all my ducks in-a-row ...and have admitted same.

And as far as my car ? ... so I like an odd-ball combos. WHO else here specifically sets-out to put-together a SHORT GEAR combo that runs half-way decent. And as far as someone DUPLICATING these efforts? ... I would hope that if anyone here tried ... that they could do-it with no-effort. The motor that was in the car then was a blow-by special.

And Tom ...I never claimed 20 mpg. I said that I would like to eventually put-together a combo that would run 11.99 and get 20 mpg.

Now will you admit when YOU are wrong?
Posted By: stumpy

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:00 PM

Doc F on this one maybe you should open your eyes and realize that you are on a one way street going the wrong way.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:10 PM

Quote:

Doc F on this one maybe you should open your eyes and realize that you are on a one way street going the wrong way.



Well stumpy ...when Doc Diff refers to a 2.76 gear as a HIGH SPEED gear and does not refer to it as you do ... and HE is the resident Xpert here on moparts ....WHO is going the wrong-way on that "street" ..? ....

....
Posted By: stumpy

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:15 PM

It may be a high speed gear but it's not a short gear. Resident expert, I don't think so, but nice try.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:25 PM

Quote:

It may be a high speed gear but it's not a short gear. Resident expert, I don't think so, but nice try.



...then an apple is a watermelon ?

Anf you are saying that Doc Diff is not the res-Xpert here ?
Posted By: MoparforLife

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:37 PM

High, tall, long legged all mean the lower/smaller numerical number where I came from.
Where a low, short, deep gear = higher/larger numerical number
4.56 is a low,or deep gear
2.94 = high, tall gear.
Posted By: stumpy

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:39 PM

I was refering to your interpretation of what he said. Yes I agree he is the resident expert. Of course Doc you are right and every other car guy in the world is wrong. Go to sleep tonight feeling good that you have changed the minds of thousands of other people to your way of naming the way rear end gears are refered to. But don't expect the change to happen overnight. It may takes decades to get evryone in line.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:41 PM

Ok M4L .....

So ...to you ...and apple IS a watermelon ?

And GO to Dennys and order a short-stack of pancakes.
Posted By: 70Cuda383

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:46 PM

I think you're the only one who understands the "reverse logic" on how a low number ratio is "short"

I understand what you're saying, high, low, tall, short, big, small...2 is less than 3, therefore 2 is shorter than 3. therefore a 2.x gear ratio is shorter than a 3.x gear ratio.

but...you're the only one who sees it that way


and you're right, I made up the 20mpg claim, because I couldn't remember what you were actually getting, but I remember that it was high teens with a carb that nobody likes and a TALL gear ratio in the 2.x range.

as for your odd and different combo...nothing wrong there. I think that's why most of us like Mopars....they're different and not boring.


(that's why I'm here. At the Academy, Camaros were everywhere, classics and late model. same with Mustangs, same with Corvettes. they were boring. if I got one of those, I would be "just another lemming following the crowd" no thanks! )
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/15/11 11:56 PM

Quote:

I think you're the only one who understands the "reverse logic" on how a low number ratio is "short"






MY warped logic ?

Oh-tay then ... if you are 72 inches in length ...and your wife is 60 inches .... using YOUR logic ....

she is TALLER than you ...
Posted By: stumpy

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 12:44 AM

Come on Doc you know that height has nothing to do with gear ratios. You are the one comparing apples and watermelons. But we all know if some one said the sky was blue you'd come back with something else.
Posted By: 70Cuda383

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 01:27 AM

Quote:

Quote:

I think you're the only one who understands the "reverse logic" on how a low number ratio is "short"






MY warped logic ?

Oh-tay then ... if you are 72 inches in length ...and your wife is 60 inches .... using YOUR logic ....

she is TALLER than you ...






Like I said doc. I understand what you're saying, and your twisted logic. Larger number means taller number. But my point was that you're the only person I know who thinks that way when it comes to gear ratios.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:16 AM

Youz think whatchoowanna .....

TRYin' to clue you guys in ....is like beating a dead ky3-jelly-horse ..
Posted By: Nirvana

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:23 AM

Its no use guys
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:29 AM

Ahhh geese ....did someone in here AGAIN ? ...
Posted By: Pacnorthcuda

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:32 AM

Good God Doc! This is still going on?
Give it up--you're wrong on this one.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:34 AM

Damn PACman ...I have given up ....I just want someone to "open a WINDOW" around here and get some fresh (and truthful) "air" in here ...
Posted By: Anonymous

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:36 AM

.

Attached picture 6828302-facepalm2.jpg
Posted By: Twostick

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 04:14 AM

Quote:

.





Kevin
Posted By: DrCharles

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 04:31 AM

Quote:

Good God Doc! This is still going on?
Give it up--you're wrong on this one.



He's just trolling you... never engage in a battle of wits with the unarmed. I've had enough of his "facts". Another one for the blocked list. <plonk> That'll make this thread about 75% "shorter" so I can read through it "faster"
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 04:38 AM

Deleted by the HKMTBC

Attached picture 6828528-ThreadDirection.jpg
Posted By: Evil Spirit

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 04:41 AM

Quote:

.



And he had hair when this post started...

Attached picture 6828533-Picard.jpg
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 04:53 AM

Quote:

Quote:

Good God Doc! This is still going on?
Give it up--you're wrong on this one.



He's just trolling you... never engage in a battle of wits with the unarmed. I've had enough of his "facts". Another one for the blocked list. <plonk> That'll make this thread about 75% "shorter" so I can read through it "faster"



DrCharles .. the people-mechanic ... I hope that you "work" on people better than the skills you display here on your automotive knowledge.

Wits ? ...and the "battle" of ? ...I would like-that with you ...BRING IT.

And you have a BLOCKED LIST ? ..... so that is what your Mommy told you to do ? .... shows-me what a candy-azz you are !

And just a note for you keyboard-commandos.... I come-after NO ONE here. JUST LIKE what happened here ....this Dr ... throws a cream-pie at me ... and he gets TWO right-back at him.
Posted By: rave_12000

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 05:06 AM

i pulled an 8 3/4 2.76 sure grip out of a 69 sport satellite back in the day. i am not sure if i am correct, but i always expected that the higher (or taller...hee, hee) geared stock third member would likely produce a less strained or "abused" sure grip carrier...and the carrier might be a better candidate to throw in a rebuilder third member without actually rebuilding the carrier.
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 05:17 AM

Quote:

i pulled an 8 3/4 2.76 sure grip out of a 69 sport satellite back in the day. i am not sure if i am correct, but i always expected that the higher (or taller...hee, hee) geared stock third member would likely produce a less strained or "abused" sure grip carrier...and the carrier might be a better candidate to throw in a rebuilder third member without actually rebuilding the carrier.



Did I hear Bigger ? ... aka TALLER ? ... ...

...so I am NOT alone ...
Posted By: JohnRR

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 05:34 AM

Quote:

Good God Doc! This is still going on?
Give it up--you're wrong on this one.



no kidding , all the protologist of fibberglASS is doing is padding his post count ... you guys are on hook line and sinker ...
Posted By: dOrk !

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 05:38 AM

Oh Mr Sunshine ....

If there is ANYone here that is guilty of padding his post-count ...IT IS you ..

And did you finally grow-a-pair enuff to stop blocking me ? ...
Posted By: Pale_Roader

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 10:39 AM

Quote:

I've had enough of his "facts". Another one for the blocked list. <plonk> That'll make this thread about 75% "shorter" so I can read through it "faster"



Oh [Edited by Moparts - Family Friendly Site - Keep it clean]... now that is funny.

As for the rest ov you longtallshortlow bastards... I hope you're happy. You've ruined my beautiful thread.
Posted By: patrick

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 12:54 PM

While I should not feed the troll,
DocF, I do not think it means what you say it means....

here's DocDiff's reply:

Quote:

2.76 ratio: "high" speed gear

4.88 ratio: "low" speed gear

Transmission: "low gear" first gear

Transmission: "high gear" overdrive

Transfer case: "low range, compound low" low speed

Transfer case: "high range" high speed



where in here does he call a 2.76 a "short gear" and a 4.xx a "tall gear"?

tall/high gears = NUMERICALLY smaller
short/low gears = NUMERICALLY bigger

what's confusing you is the proper way to think of it is the inverse of the stated ratio, as the important way to look at it is "X" input creates "Y" output

a 2.76 gear means 2.76 turns of the driveshaft turns the wheel once. a 4.88 gear means 4.88 turns of the driveshaft turns the tire once, so to compare, you need to normalize the input.

with 4.88's 1 turn of the driveshaft turns the tire .205 times


with 2.76's 1 turn of the driveshaft turns the tire .362 times

.362 > .205, and therefore the 2.76 (SMALLER NUMERICALLY) is "taller" or "higher"

in 15 years as a degreed mechanical engineer, you are the ONLY person I've ever heard consider a 2.76:1 gear as a "low" or "short" gear, and a 4.10 as a "high" or "tall" gear.
Posted By: A12

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 01:37 PM

Quote:

As for the rest ov you longtallshortlow bastards... I hope you're happy. You've ruined my beautiful thread.





There you go, this b@st@rd did his part to try to restore the "beauty" of this thread which should have been answered in maybe three or four replies IMO but that might be a tall tale.

MikeR

Posted By: Pale_Roader

Re: How rare is a 8 3/4" 2.76 sure grip? - 09/16/11 02:00 PM

Quote:

Quote:

As for the rest ov you longtallshortlow bastards... I hope you're happy. You've ruined my beautiful thread.





There you go, this [Email]b@st@rd[/Email] did his part to try to restore the "beauty" of this thread which should have been answered in maybe three or four replies IMO but that might be a tall tale.

MikeR





Hahahahahaha. Aww... they're pretty...

Oh wait, do you mean a tall tale or a short tale now...??? I'm confused... does DocF get tall when he's angry...???
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