ok, please answer asap. I currently have a 10 bolt, 28 spline, 3.08 posi unit in my camaro. there is 2 series and 3 series for these cars. on jegs it says 2 series is for 3.08 and numerically lower gears, and 3 series is for 3.23 and up. so If I want to change my current rear end into 4.10 gears, and keep the same posi carrier, all I need to do is buy a 2 series 4.10 ring and pinion set right? and everything will bolt up to my posi carrier? Please answer asap. I already have the bearings, and the posi unit is mint cond, so all i will need is jegs # 836-49-0009-1 right? I just need to make sure thats the right ring/pinion set for what im trying to do. Also, once this gets all done, if it starts to whine, what is the reason? is it because of bearings not put in right? is it because of gears not calibrated right? what? thanks guys.. please answer asap.. im awake awaiting answers.

Nate

 

ya, you only need the 4.10 ring and pinion setup for a 2 series carrier, it is a thicker ring gear, whinning would mean improper gear pattern setup............

 

thank you.. thats what i needed to know

 

anyone know what RPM i will be running at going 60mph with my TH350 trans and 4.10 gears? can someone tell me really quick.. is there a huge noticable diff between 3.73 and 4.10?

nate

 

Assuming your tire radius is 13"...

3.73...@60mph...2892rpm
4.10...@60mph...3179rpm