3rd gen rear end

[justlearning]

ok i have a 91 rs and am about to install a positraction rear end out of a third gen. iroc does anyone know what the gears r set at for this rear end???

[Genopsyde]

3.23 or 3.43 i'm pretty sure

[Genopsyde]

3.42 i mean

[1992RS]

I'm pretty sure the Iroc still had the same rears as the rest of us, 2.73 for auto or 3.08 for manual.

[DaMoNe6969]

Your best bet would be to count.. Iroc's used a few different gear ratios

[DaMoNe6969]

Or if you gave me the axle id number I could tell you waht the gears were

[1992RS]

or you could take a micrometer to the pinion gear and devide 7.5 by what you get..but that's a little redundant. LOL

[DaMoNe6969]

Cant say as Ive heard that one before..
Makes me wanna go pull my diff cover off!

[1992RS]

well that's how they get the ratio

[DaMoNe6969]

interesting.. But no more redundant than counting the teeth on the ring and pinion gears..lol It might even be easier

[1992RS]

Or you can take 7.5 and devide it by what you think the ratio might be and the answer will be how big the pinion gear is. 2.73=2.74" 3.08=2.435 3.23=2.322 3.43=2.19 and so on and so forth...LOl redundant..