who in MA is A4 Bolt-on
Question for you guys.
I want to put 3.73's in, would it be worth it using the stock rear or should I just wait for when I replace the whole thing probably with a 12 bolt? My goals for the car are heads/cam maybe with a small shot.
I want to put 3.73's in, would it be worth it using the stock rear or should I just wait for when I replace the whole thing probably with a 12 bolt? My goals for the car are heads/cam maybe with a small shot.
Lots of guys will disagree, but I say put the 3.73's in the 10 bolt if your rear doesn't have a lot of mileage and a ton of passes. Step up and buy GENUINE GM gears from a GM parts supplier and have a reputable gear installer put them in along w/a solid crush collar. You have a Torsen? T/A cover and studbolt kit? Moser HD C-clip axles are considerably stronger than the stockers....3 channel rear, or a TCS car? Install w/GM 3.73's and solid collar (parts and labor) shouldn't be more than 600-650 dollars. You know what a 12 bolt costs....even if you do the install yourself...and the Moser 12 bolts aren't much better than the stock 10 bolts... If you had a M6, I'd say step up for a 12 bolt, or 9" soon as you can, but the A4's will live w/10 bolts if you keep them inspected and freshen them up every season.... 
WJ
WJ
Originally Posted by WJ SOM SS
Lots of guys will disagree, but I say put the 3.73's in the 10 bolt if your rear doesn't have a lot of mileage and a ton of passes. Step up and buy GENUINE GM gears from a GM parts supplier and have a reputable gear installer put them in along w/a solid crush collar. You have a Torsen? T/A cover and studbolt kit? Moser HD C-clip axles are considerably stronger than the stockers....3 channel rear, or a TCS car? Install w/GM 3.73's and solid collar (parts and labor) shouldn't be more than 600-650 dollars. You know what a 12 bolt costs....even if you do the install yourself...and the Moser 12 bolts aren't much better than the stock 10 bolts... If you had a M6, I'd say step up for a 12 bolt, or 9" soon as you can, but the A4's will live w/10 bolts if you keep them inspected and freshen them up every season.... WJ
WJ
Originally Posted by WJ SOM SS
Lots of guys will disagree, but I say put the 3.73's in the 10 bolt if your rear doesn't have a lot of mileage and a ton of passes. Step up and buy GENUINE GM gears from a GM parts supplier and have a reputable gear installer put them in along w/a solid crush collar. You have a Torsen? T/A cover and studbolt kit? Moser HD C-clip axles are considerably stronger than the stockers....3 channel rear, or a TCS car? Install w/GM 3.73's and solid collar (parts and labor) shouldn't be more than 600-650 dollars. You know what a 12 bolt costs....even if you do the install yourself...and the Moser 12 bolts aren't much better than the stock 10 bolts... If you had a M6, I'd say step up for a 12 bolt, or 9" soon as you can, but the A4's will live w/10 bolts if you keep them inspected and freshen them up every season....
Originally Posted by ace68
WJ didn't you say I would be fine with my stock rear and 4/10's?
So what is It?
So what is It?
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Originally Posted by davered00ss
LS1Derful is running 4.10's in a stock 10 bolt A4 @ 400+rwhp. 11's.
Originally Posted by davered00ss
I thought it was an auto, 
My bad, but yes the red one. I talked to him about it on a street night @ NED. Thought it was an auto. 4.10's M6 makes more sense than A4.
My bad, but yes the red one. I talked to him about it on a street night @ NED. Thought it was an auto. 4.10's M6 makes more sense than A4.
TECH Fanatic
Joined: Nov 2001
Posts: 1,684
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From: Yarmouth, MA
Originally Posted by WJ SOM SS
I believe it's the tune, mostly and the rest is little things, like tire pressure, airbag pressure, the rear springs, the control arm re-loca brackets I'm using and the fact that the '01-'02 cars are normally just a little quicker than the '98-'00 F cars. I am still running stock shocks, BTW. The 8.5" ET Drags probably are good for 3 tenths over my old 275x17" Nittos. They are narrow, but boy, do they work w/my converter. The most expensive combo isn't always the best, IMO. BTW, I ran 12.82, 107's, 1.89 sixties w/stock converter, 17" Nitto's, and Predator tune. The Vig converter, the 8.5" ET Drags, and Slowhawk's magic gave me all the low 12.3 timeslips and the respectable 60' times...My 109+ mph doesn't reallly impress me, though. Best wishes. WJ.
Originally Posted by davered00ss
I thought it was an auto, My bad, but yes the red one. I talked to him about it on a street night @ NED. Thought it was an auto. 4.10's M6 makes more sense than A4.
My bad, but yes the red one. I talked to him about it on a street night @ NED. Thought it was an auto. 4.10's M6 makes more sense than A4.
