I decided to go with the 350 that was in the car when I bought it, and install a new cam and rework the heads. to go with the new cam set up I want. I opened the rear end to see what gears where in it and 3.08 was what I got. Are these good or should I change them. The will be raced occasionally but mostly be on the highway running up and down playing with the car. I am not a gear head but I can turn wrenches with a little instruction>

 

not a performance minded gear ratio, so if you want a little more, you can go to a 3:42, which is a factory ratio. I do believe its a different carrier though, so you will need to get a different carrier or use the special thicker gears to fit what you have.

installing gears requires special setup or the gears will be noise and the life will be dramatically shortened. Its something to have done by a pro unless you know what you are doing.

 

I have a buddy who in the vehicle maintanece shop on the base so I have access to presses and people who know what they are doing. I see alot of people with 3.73 is there much differrence between them and 3.42. and are the 3.08's just garbage?

 

The 3.08 if it should be a 9 bolt rear, which is a 3 series carrier. You can build a 3.45 or a 3.70. The 3.45 will get a little better mileage if that's a concern. You will also have to figure out and change speedometer gears in the tranny.

 

its a 10 bolt rear end

 

There's much in the link below that you may find interesting:

https://www.thirdgen.org/forums/tran...-10-bolts.html

BTW, 3.08 is series II.

JamesC

 

Well i have a 350 with 3.42's and now i barely have a first gear(700r4 trans). LOL

 

Why is that?

 

cause the 700r4 has a very low first gear to begin with (3.06), and tpi makes tons of low end torque anyway. 3.42 is the tpi auto car's 3.73 as far as i am concerned.