|
Re: Will a 8 3/4 Live?
[Re: Quicktree]
#1548258
12/16/13 07:42 PM
12/16/13 07:42 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Quote:
I don't want to hurt fealings or step on toes but with his set-up IT WILL BREAK!
Any diff can break with enough abuse.
I speak from experience 3800lbs 69 Roadrunner with a 10" slick, 5 speed, Cal-Tracs, around 650lbs/ft torque. I have broke axles, bent things on a Dana 60. The 8 3/4 would have destoyed it self long, long ago. 
 I wouldn't recommend an 8-3/4 to anyone but everybody knows that. 
WHAT have I said ALL along Tony... WEIGHT kills them...
if you own a TANK dont use it with slicks... plenty
of big HP cars run them but they are light
|
|
|
Re: Will a 8 3/4 Live?
[Re: Biginchmopar]
#1548259
12/16/13 07:47 PM
12/16/13 07:47 PM
|
Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
|
master
Joined: Nov 2004
Posts: 6,890
North Alabama
|
Quote:
I don't want to hurt fealings or step on toes but with his set-up IT WILL BREAK!
Any diff can break with enough abuse.
I speak from experience 3800lbs 69 Roadrunner with a 10" slick, 5 speed, Cal-Tracs, around 650lbs/ft torque. I have broke axles, bent things on a Dana 60. The 8 3/4 would have destoyed it self long, long ago.
^^^^^^^^^^^^^This^^^^^^^^^its gonna break, just a matter of time and the original poster KNOWS this, or he wouldn't have even started the thread. Personally I think investing money in anything for an 8.75, other than a daily driver is a waste of money. Back braces, billet caps and all that other stuff do NOT address the inherit flaw. The cases FLEX, period, end of story
Monte
|
|
|
Re: Will a 8 3/4 Live?
[Re: clonestocker]
#1548260
12/16/13 08:46 PM
12/16/13 08:46 PM
|
Joined: Sep 2012
Posts: 1,563
Janesville, WI
SpareParts
pro stock
|
pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
|
Quote:
Talk to me about the 8.8 Ford. I have one out of an Explorer for the other Duster.
I haven't personally put one in an A body but I have one friend who'll be doing it soon and another friend who's got one in a 3600lb 4th gen Trans Am. Stick shift nitrous launches and into the 10's at about 130mph and the little 8.8 keeps purring. It seems like it would be a simple swap and I think they have a pretty thick axle tube. It's becoming very popular so a little research should get you a wealth of knowledge
|
|
|
Re: Will a 8 3/4 Live?
[Re: SpareParts]
#1548261
12/16/13 08:57 PM
12/16/13 08:57 PM
|
Joined: Jan 2003
Posts: 75,017
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,017
U.S.S.A.
|
Quote:
Ford 8.8 it's cheap simple and strong. It's also a light weight setup compared to the D60
8.8 is strong AFTER you throw strong parts at it.
I have a friend that raced a smallblock ford mustang in a stock class and I have rebuilt that rear twice. Now he has a 2012 mustang v6 with a ford motorsport 8.8 , car has run a best of 12.81 @107 and we pulled the rear a few weeks for me to go thru that one also.
|
|
|
Re: Will a 8 3/4 Live?
[Re: clonestocker]
#1548263
12/16/13 11:15 PM
12/16/13 11:15 PM
|
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar
master
|
master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
|
Quote:
Talk to me about the 8.8 Ford. I have one out of an Explorer for the other Duster.
GregsDart did a thread on his....as I recall , it was pretty easy to do.
|
|
|
Re: Will a 8 3/4 Live?
[Re: JohnRR]
#1548264
12/16/13 11:25 PM
12/16/13 11:25 PM
|
Joined: Sep 2012
Posts: 1,563
Janesville, WI
SpareParts
pro stock
|
pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
|
Quote:
Quote:
Ford 8.8 it's cheap simple and strong. It's also a light weight setup compared to the D60
8.8 is strong AFTER you throw strong parts at it.
I have a friend that raced a smallblock ford mustang in a stock class and I have rebuilt that rear twice. Now he has a 2012 mustang v6 with a ford motorsport 8.8 , car has run a best of 12.81 @107 and we pulled the rear a few weeks for me to go thru that one also.
Idk how you are having that bad of luck. All we did was a Detroit locker, Richmond 3.73 gear and Moser axles because it has GM ends and brakes. We're moving a Kenworth compared to a mustang lol
|
|
|
Re: Will a 8 3/4 Live?
[Re: SpareParts]
#1548265
12/17/13 12:59 AM
12/17/13 12:59 AM
|
Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
|
master
Joined: Nov 2004
Posts: 6,890
North Alabama
|
A rear like an 8.8 or Dana will always be stronger than most "chunk" type rears, because of the beef around the pinion. Ford got it right on the 9" with the extra support bearing on the big end of the pinion. With a nodular case and pinion support, the 9" is virtually bullet proof and is the reason it is the choice of 95% of racers. Olds rears are also very strong because of sheer mass, but parts are tough to find. A Dana is obviously strong, but not many racers these days want to put a "truck" rear in their race car.
The Ford is the best choice.........in about 1,2,3......all the "haters" will be here telling you how expensive a Ford is. Bull excrement, that is a fallacy, as the ones who claim it costs so much are WRONG.
Monte
|
|
|
Re: Will a 8 3/4 Live?
[Re: Monte_Smith]
#1548266
12/17/13 02:16 AM
12/17/13 02:16 AM
|
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
|
master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
|
Didn't read all the arguing, but to the OP: A body weight will be much easier on it than B body weight would: Plus. Manual trans will be much harder on it than a 727 would: Minus. He has it and would have to start from scratch with a 9" or Dana: Plus. Personally, I'd beef it up and go with it. I run an 8-3/4" in my heavy Satellite, but I HAVE broken 2 sure-grip units and a gearset. I finally went to a Detroit locker, and had the 8.75 housing backbraced. Added a set of Dr.Diff axles..... I feel pretty safe about it right now. My car weighs about 3750 with me in it, and 60's in 1.6 with ET Street radials.\ 
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
|
|
|
Re: Will a 8 3/4 Live?
[Re: StealthWedge67]
#1548269
12/17/13 04:45 AM
12/17/13 04:45 AM
|
Joined: Sep 2013
Posts: 168
Moparts
SSDart
member
|
member
Joined: Sep 2013
Posts: 168
Moparts
|
Quote:
Quote:
Does not matter about the weight........
Wrong.... moving weight kills rear ends. period.
What I am saying is..... it does not matter how light the car is.. it's a stick car....... it WILL break the 8 3/4.......
|
|
|
Re: Will a 8 3/4 Live?
[Re: Monte_Smith]
#1548271
12/17/13 05:26 AM
12/17/13 05:26 AM
|
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar
master
|
master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
|
Quote:
The Ford is the best choice.........in about 1,2,3......all the "haters" will be here telling you how expensive a Ford is. Bull excrement, that is a fallacy, as the ones who claim it costs so much are WRONG.
Monte
I agree.......I can do a 9" that will support pretty decent power cheaper than any other. The 3.25" bore aftermarket case's are cheap , the spool, gear and bearings are about the same and it will be stronger than an 8 3/4 ....... you have more options as far as housings and ends.
I went with the 8 3/4 because I had one too , but if ( the magic word ) I had it to do over again , I would have gone with ladder bars and a 9 " from the start.
The difference would be " I think it will work " vs. " I know it will work ".
I still think S/S springs and an 8 3/4 will work with my deal , but if it doesn't , I know what will.
|
|
|
Re: Will a 8 3/4 Live?
[Re: tubtar]
#1548272
12/17/13 11:51 AM
12/17/13 11:51 AM
|
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff
master
|
master
Joined: Jan 2003
Posts: 8,016
Polson, MT
|
A new Dana 60 works great in torquey, leaf spring equipped cars. It is strong, relatively light, efficient and inexpensive.
I can provide a new, bolt-in Dana 60 with 35 spline spool, 1350 yoke, and chr-mo race axles for $1795.
|
|
|
Re: Will a 8 3/4 Live?
[Re: Quicktree]
#1548275
12/17/13 03:17 PM
12/17/13 03:17 PM
|
Joined: Apr 2003
Posts: 1,627
anywhere@ anytime
actionange
top fuel
|
top fuel
Joined: Apr 2003
Posts: 1,627
anywhere@ anytime
|
Quote:
Quote:
I don't want to hurt fealings or step on toes but with his set-up IT WILL BREAK!
Any diff can break with enough abuse.
I speak from experience 3800lbs 69 Roadrunner with a 10" slick, 5 speed, Cal-Tracs, around 650lbs/ft torque. I have broke axles, bent things on a Dana 60. The 8 3/4 would have destoyed it self long, long ago.
I wouldn't recommend an 8-3/4 to anyone but everybody knows that.
This has been discussed by you and I before Quicktree. I'm still using one in my 67 Belvedere running low 10s. It weighs at least 3750 lbs race ready. Leaving at approx. 2000 rpm. 1.42 60 ft so I'm not beating it at the hit.
Using Mark Williams axles, spool and Richmond gears.
Like the Everready Bunny...still going.
Happy Holidays!
|
|
|
Re: Will a 8 3/4 Live?
[Re: clonestocker]
#1548276
12/17/13 03:24 PM
12/17/13 03:24 PM
|
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
My son's making changes to his 67 Dart. He will eventually be going to a Gen3 Hemi w/Mods. This is a street car. He will be running Cal Tracs, TKO 600 5 spd and will use a 27 x10.5 ET Street tire. He was told to put a Back Brace on it and it will use a clutch posi. Opinions please. thx matt
I don't see a Gen III hemi making rear-end breaking torque unless it's boosted. 67 Darts are pretty light. Just back brace it and let it rip, I would upgrade the axles.
|
|
|
|
|
You can buy brand new Strange S60's now which is even sweeter.... 
