I've got an 89 Iroc with a 700r. I plan to add a stealthram before long, a set of headers and full exhaust, and maybe later on heads and cam. Mainly just bolt ons for now but I'm just wondering what would be the ideal gear ratio for a TPI L98. Someone has all ready got rid of the 9 bolt and I've got a set of 28 spline axles, a 2002 carrier, and a set of 3.23s, 3.42s, and 3.73s. What do you guys think?

 

3:42, dont touch those 3:73 if you have the -stock tpi-.

 

i agree, i kinda wish i had even gone with 3.23's instead sometimes

 

I have 3:23s....ill have the rear re-done and have a 3:42 gear in it.

 

why?

 

3.42 is the ideal tpi gear to me. I have those in my IROC and I like them. My 91 Corvette had 3.55s, and that car hooked hard and accelerated like a missile.

 

because the pois is [dead] me and my budd swapped my 9 bolt 2:77 out for it out of this iroc-z parts car he had and it [HOWLED] to high heaven!!! Pen seal is/was leaken and its just a high mileage beat on rear end....