mrws6speed

I'm looking at putting 4.10 gears in my '02 TransAm. It's an M6 car with 22K miles. The only mods are the air box and a Corsa "Cat Back" system.

There may be the possibility of some future mods like headers and y-pipe. Heads and cam are still up in the air.

Even with these mods, I'm at over 5,000 feet in elevation, so I loose about 80 rwhp.....so it's not like I'm putting a ton of power to the ground.

I want to beef up the rear end a little though. Should I go with an Auburn diff? What gears should I use? Any other suggestions?

Who should I buy from (sponsors)?

I appreciate your help.

EPP

iTrader: (22)

All I would do is install some gears, I wouldn't spend any money on a different posi unit. You could stick a 4 cyl in your car and still break the rear with a pair of sticky tires and a six speed. I have seen brand new Richmond gears completely strip their gears on the first pass on a 7.5 rear, and I have seen off brand gears hold up for a while, so it doesn't appear that a brand name on the gears is going to make any difference. Bob

mrws6speed

Thanks for the input. I guess I should mention that the car is not a race car (although I'll take it out to the strip maybe once every year or two).

The car doesn't/won't have slicks. It has 275's that have better grip than the stock Eagle F1's.

I do like to drop the clutch and roast the tires though.

Anybody else have more opinions on what route I should go?