[Street Rod]

I have a 91 Camaro RS with a 10-bolt non-posi rear end. I can get a worm gear and carrier etc. out of a 91 IROC for about $75. but it's 2.83 gear ratio... if I'm going to do the swap, should I look for a better gear ratio like 3.08? This is basically just a street car that I want to give more power and traction.

Another thing is, How much power can a 10 bolt handle? I'm going to be swapping the motor at some point, and have considered going with an LS1 and 4L60E tranny... will the 10 bolt be able to handle 300-350hp? If not, what rear ends should I be looking at? A 9 bolt from an earlier year camaro?

[xntrik]

Originally Posted by Street Rod

I have a 91 Camaro RS with a 10-bolt non-posi rear end. I can get a worm gear and carrier etc. out of a 91 IROC for about $75. but it's 2.83 gear ratio... if I'm going to do the swap, should I look for a better gear ratio like 3.08? This is basically just a street car that I want to give more power and traction.

Another thing is, How much power can a 10 bolt handle? I'm going to be swapping the motor at some point, and have considered going with an LS1 and 4L60E tranny... will the 10 bolt be able to handle 300-350hp? If not, what rear ends should I be looking at? A 9 bolt from an earlier year camaro?

If your Camaro is a V8.....I'd stick a posi in your existing housing. It will take 350 hp without a sweat unless you get really abusive. I'd go for a 3.73 gear since you do have an overdrive transmission. Properly maintained 10 bolts behind an automatic can run 12s without problems.

[Hogg]

The 10 bolts in the 3rd Gen's are 7.5" rears and the 4th Gens are 7.625". IIRC. Both are interchangeable.

A 9 bolt Aussie rearend would be stronger but gear ratios are limited.


Grab that IROC rear esp. if it is a limited slip. You will need BOTH wheels providing traction with an LS1.

peace
Hog

[Street Rod]

I'm almost certain I'm going to get this IROC rear because it's already pulled and they're not the easiest thing to come across. I think it might be 2.93 or 2.73 though, not 2.83... but I would like a 3.73 for the improved acceleration.
EDIT: well I found a 3.73, only this one is around $150... I guess the 3.73 is MUCH more highly sought after...

Also, I'm not sure if mine has 26 spline or 28 spline axles?... I guess I need to find that out before anything... I've read that they used 26 spline exclusively in camaros up till 89, and then went to 28 spline, but that might only be for the Z28 and IROC's that came with posi, I'm think my weakling nonposi rearend might still be the 26 spline??? in which case i would have to get new axles as well... Orrrr, get a 26 spline posi locker and gears from a 82-89 camaro?