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Re: 8 3/4 vs Dana 60 weight difference?
[Re: mokid]
#1075001
09/14/11 06:56 PM
09/14/11 06:56 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Same set up I have in my Barracuda, But I still can't change gears at the track. 9 inch all the way
When was the last time you changed gears at the track...
I've got a 8 3/4 in the P-Body and a 9" in the Rampage
and I've NEVER changed gears at the track
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: MR_P_BODY]
#1075002
09/14/11 07:49 PM
09/14/11 07:49 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Same set up I have in my Barracuda, But I still can't change gears at the track. 9 inch all the way
When was the last time you changed gears at the track...
I've got a 8 3/4 in the P-Body and a 9" in the Rampage
and I've NEVER changed gears at the track
Sure would be nice to be able to, if you hurt a rearend on a Fri at a 3 day race.
I know I have more than once in my dragsters.
I have ran 2 different gear sets during TNT.
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: Challenger 1]
#1075003
09/14/11 09:59 PM
09/14/11 09:59 PM
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Joined: Jan 2007
Posts: 1,169
MI
68shifter
super stock
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super stock
Joined: Jan 2007
Posts: 1,169
MI
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 This is a Dana I finished tonight. Everything new except the housing - A body width. Posi, green bearings, 35 spline dr. diff axles, 11" brake setup etc. As pictured with perches and lines but no fluid was - 240lbs Sorry, but no 8-3/4 to compare to. Last year I put Wilwoods on my Dana and lost 45 lbs, so getting under 200 no problem.
68' Barracuda (4 speed)
64' Savoy (4 speed)
65' Satellite (girl tranny)
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: Challenger 1]
#1075005
09/14/11 10:06 PM
09/14/11 10:06 PM
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Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff
master
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master
Joined: Jan 2003
Posts: 8,016
Polson, MT
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"Why would you want to run a heavy dana 60 that have few aftermarket parts made for them with limited gear ratios?"
Heavy??
Few aftermarket parts??
Limited gear ratios??
A NEW Dana 60 weighs about the same, costs less, and is MORE EFFICIENT than a COMPARABLE 9".
Commonly available Dana 60 gear ratios:
3.54, 3.55, 3.73, 3.90, 4.09, 4.10, 4.30, 4.56, 4.88, 5.13, 5.38, 5.86, 6.17, 6.50, 7.17
Commonly available Dana 60 spools:
35 spline
40 spline
Commonly available Dana 60 traction differentials:
30 spline
35 spline
40 spline
As far as I know, there are only 3 35 spline traction differentials available for a 9" and NO 40 spline units.
Unless you are talking about light duty 28 spline street/cirle track gears, few ratios are available for "big pinion" 9" and 9.5" rears.
Dana 60s are very strong street/strip rears. Once again, application is everything.
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: 68shifter]
#1075006
09/14/11 10:09 PM
09/14/11 10:09 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
This is a Dana I finished tonight. Everything new except the housing - A body width. Posi, green bearings, 35 spline dr. diff axles, 11" brake setup etc. As pictured with perches and lines but no fluid was - 240lbs
Sorry, but no 8-3/4 to compare to. Last year I put Wilwoods on my Dana and lost 45 lbs, so getting under 200 no problem.
Do you have a P/N for the Y block/vent... I still
need to put one on my diff
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: MR_P_BODY]
#1075007
09/14/11 10:11 PM
09/14/11 10:11 PM
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Joined: Jan 2007
Posts: 1,169
MI
68shifter
super stock
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super stock
Joined: Jan 2007
Posts: 1,169
MI
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Mr. P
I dont on me. But its for a 76 Powerwagon front axle 4wd. Any advance etc for $18, usually a day to get.
PN - 77171Z from autozones website. They list it as an inner. Should be a Dorman number
Last edited by 68shifter; 09/14/11 10:29 PM.
68' Barracuda (4 speed)
64' Savoy (4 speed)
65' Satellite (girl tranny)
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: 68shifter]
#1075008
09/14/11 10:16 PM
09/14/11 10:16 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Mr. P
I dont on me. But its for a 76 Powerwagon front axle 4wd. Any advance etc for $18, usually a day to get.
Thanks... I'll hit the parts store tomorrow
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: MR_P_BODY]
#1075009
09/14/11 10:23 PM
09/14/11 10:23 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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As I weighed my aluminum center A body 8.75 with a steel spool to a Ford truck Dana housing, bare, unshortened there was a 50 pound difference. No brakes on either one but the Dana housing did still have the full floating ends on it. If I had it to do over again I'd have a Dana in my car. With a pro gear I'd probably never break it and if I have to do major work at a track, I'm taking it home. Breaking something at the track is one thing but I've driven a lot of miles just to red light in the first round so what's the big deal, I can't fix the red light. If it's something simple I'll fix it, if it's major it's not going to be a permanent repair at the track anyway so it's just going home. Might just as well drink a few beers and watch the rest of you for awhile. 
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: Guitar Jones]
#1075010
09/14/11 10:37 PM
09/14/11 10:37 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
As I weighed my aluminum center A body 8.75 with a steel spool to a Ford truck Dana housing, bare, unshortened there was a 50 pound difference. No brakes on either one but the Dana housing did still have the full floating ends on it. If I had it to do over again I'd have a Dana in my car. With a pro gear I'd probably never break it and if I have to do major work at a track, I'm taking it home. Breaking something at the track is one thing but I've driven a lot of miles just to red light in the first round so what's the big deal, I can't fix the red light. If it's something simple I'll fix it, if it's major it's not going to be a permanent repair at the track anyway so it's just going home. Might just as well drink a few beers and watch the rest of you for awhile.
I have a alum center 8 3/4 with back brace, steel
spool,narrowed and disc brakes.... I never did weigh
it but its alot light than the dana I narrowed for
a buddies car... basically the same set up
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: DoctorDiff]
#1075012
09/15/11 09:29 AM
09/15/11 09:29 AM
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Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
Moparmal
master
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master
Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
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Quote:
Heavy??
Few aftermarket parts??
Limited gear ratios??
A NEW Dana 60 weighs about the same, costs less, and is MORE EFFICIENT than a COMPARABLE 9".
Commonly available Dana 60 gear ratios:
3.54, 3.55, 3.73, 3.90, 4.09, 4.10, 4.30, 4.56, 4.88, 5.13, 5.38, 5.86, 6.17, 6.50, 7.17
Commonly available Dana 60 spools:
35 spline
40 spline
Commonly available Dana 60 traction differentials:
30 spline
35 spline
40 spline
As far as I know, there are only 3 35 spline traction differentials available for a 9" and NO 40 spline units.
Unless you are talking about light duty 28 spline street/cirle track gears, few ratios are available for "big pinion" 9" and 9.5" rears.
Dana 60s are very strong street/strip rears. Once again, application is everything.
The Dr is 'in'. 
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: 340B5]
#1075014
09/15/11 03:27 PM
09/15/11 03:27 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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i've broken an 8 3/4. i've broken a 9". i put a dana in, and it runs EXACTLY the same et. exactly. mr dana laughs at my attempts to hurt him. i recommend the dana. get close on your gear ratio, and fine tune using tire diameter (how you should be doing it anyway).
for what is the good life if not doing things thoughtfully?
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: WheelsUp73]
#1075015
09/15/11 05:30 PM
09/15/11 05:30 PM
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Joined: Jun 2006
Posts: 834
Beavercreek, Ohio
OA5599
OP
super stock
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OP
super stock
Joined: Jun 2006
Posts: 834
Beavercreek, Ohio
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Quote:
Quote:
Quote:
30 lbs-60 lbs right over the wheels where ya need it.
Not when its "unsprung" weight !!!
Agree 100%.
You lost me. It's primarily a street car that sees track 3 or 4 times a year. Also, I understand why some of you recommend a 9", but the Dana is bought and paid for. 35 spline with power lock and a 4.10. No desire to gear swap...just bought it so I would get more sleep the night before raceday. Thanks for all of the responses. We will weigh both and post numbers when it comes time to do the swap.
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: OA5599]
#1075016
09/15/11 06:22 PM
09/15/11 06:22 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
super stock
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super stock
Joined: Mar 2009
Posts: 1,058
bigfork mn
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For a A body why not just run the 8 3/4? I have a 8 3/4 in my B body seems to work good! 35 spline axles, spool, m/w cap and back braced.  Iknow the thread says whats the weight difference! 
Last edited by dragram440; 09/15/11 06:23 PM.
67' charger 499 RB
10.57 at 127
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: dragram440]
#1075017
09/15/11 07:40 PM
09/15/11 07:40 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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and the debate goes on, 8 3/4 is a very strong carrier, if set up right. a dana does weigh more thats a fact , but the hp it gains far outwieghs that issue, i have run both, and have realy picked up et by going with a dana, gear for gear change. i cant say nothin for 9" i figure they belong to ford, so i leave them there
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Re: 8 3/4 vs Dana 60 weight difference?
[Re: dennismopar73]
#1075018
09/15/11 08:37 PM
09/15/11 08:37 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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I've heard of Mopar Stock racers do the comparison, compensated for the weight so the car maintained the same total weight, and the car ran the same! The ring & pinion relationship in the housing is more efficient in a Dana 60. Personally, I think the "unsprung weight" issue has been overblown in drag racing involving most cars. While I'm sure it's a factor, the "action" of that weight is minimal during a drag strip run when compared to a circle track or road course car where suspension movement is constant as well as constantly variable. But the faster you go on a drag strip, the more important it does become as small surface imperfections have to be compensated for quickly - i.e.: Pro Stock, Funny Car, Top Fuel, etc. The unsprung weight of wheels and tires is a different situation and more important. That weight is not only unsprung, but it is rotating weight with a lot of it a good distance from the center of rotation, similar to the rotation of a crankshaft and its counterweights.
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They had set the spool up with the ring and pinion set up for that housing and had it done in as quick as I could change the third member in my 8 3/4 
Planning and prepartion is everything when it comes to racing and changing parts at the track 
