It also depends on which Dana 60 housing your going to use
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30 pounds is a ton on a race car, a ton.
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As a side note the Dana is a more efficient axle. The ET difference is small.
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30 lbs-60 lbs right over the wheels where ya need it.
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Your right on that one, I wish I would have went to a 9inch but wanted to stick with all mopar. Big mistake
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30 lbs-60 lbs right over the wheels where ya need it.
Not when its "unsprung" weight !!!
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Same set up I have in my Barracuda, But I still can't change gears at the track. 9 inch all the way
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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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My Dana 60 ended up 15 lbs. lighter than the 8 3/4".
Mark Williams 40 spline gun-drilled axles, aluminum spool, and Aerospace discs in place
of the 11" x 3" drums. The brakes was the big savings.(45 lbs. lighter)
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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.
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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.
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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.
Quote:I have seen many Mopar racers that had Dana 60 in thier race cars change gear ratio at the track in 20 minutesQuote: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.
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 When it comes to costs of spare rear end parts I much rather have a Dana 60 ring and pinion mounted on a spool all set up than have a Nine inch Ford type third member set up and ready to go, $350 to $500.00 for the Dana parts versus $1300.00 + for the nine inch race third member
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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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30 lbs-60 lbs right over the wheels where ya need it.
Not when its "unsprung" weight !!!
Agree 100%.
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30 lbs-60 lbs right over the wheels where ya need it.
Not when its "unsprung" weight !!!
Agree 100%.
Iknow the thread says whats the weight difference! 
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.Quote:
didn't John Friel SS/AA Dart run with a chevy 12 bolt because it was lighter?
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DeFrank & Cohen SS/AA car ran a 12 Bolt. That was in the mid 70s.
