I have a 91 Camaro RS and the rear end is stock. I was going to keep the 3.08 gears and bought a 4th Gen Camaro carrier. However, I changed my mind and now want 3.42. I was wondering if this ring and pinion would fit the carrier and the rear end. By the way, the car has a 28 splines.

http://m.summitracing.com/parts/sum-741014/overview/

 

What gears were on the 4th gen differential? If it's a 2 series then it will work. If it's a 3 series then it won't work.

 

4th gen carriers are (like third gens) 2-series if 2.73 or 3.08.
And they're 3-series if 3.23 or 3.42.

Summit shows " Carrier Series: 2 " on those 3.42 gears. So, the gears you linked are a 3-series ratio but thicker to work with a 2-series carrier. So they will work with a carrier from a 2.73 4th gen, for example.

Old post with a good pic of 2 vs 3 series: https://www.thirdgen.org/forums/tran...i-carrier.html

Your stock 28 spline axles will work with a 4th gen carrier.

 

Why does it say 27 spline count instead of 28?

 

27 is the pinion gear spline count

 

Correct, 27 splines on the pinion shaft, not the axles.

 

Would you go with the thicker gears? Or with a spacer?

 

DO NOT use a spacer. They create HUGE problems. If you have a 2 series differential then use the thick gear, or get a 3 series for the standard gear.

 

That's what I thought! Thanks for all the advice!