What gears?

[xstuntman]

So after doing some research (what i could find) it looks like i can swap my LS2 automatics 2.92 gears by going with an LT carrier and installing a 3.55 set.
Is there anyone making a 3.73 or 3.91 set for the LT automatic carrier?
Really, really want 3.91s.

[Pearlj10]

I don’t believe so. Isn’t Richmond the only company making 3.55s? I’ve seen a lot of complaints that those gears make a lot of noise. I don’t have the LS2 (RS that had 3.27s) but swapped in a 3.91 carriers, axles, and hubs from a 1LE. Absolutely love it and wouldn’t go back. Even with the supercharger that I just added.

[xstuntman]

Ive heard they were noisy but never any updates on if they grew quieter once they wore in.
My goal of running 3.91s might be dying.

[IneedAZ]

I had both 3.73 and 3.91 in my 2012. The 3.91 felt better! Best bet is to try to find a used 1LE rear. Look on LKQonline.com

[BuddyLee]

The 3.91 would be a good match for the 2013 L99 automatic set up?

[havelegs]

Originally Posted by BuddyLee

The 3.91 would be a good match for the 2013 L99 automatic set up?

Ya. Very good.

[BuddyLee]

Originally Posted by havelegs

Ya. Very good.

Thanks, Legs!

[havelegs]

Originally Posted by BuddyLee

Thanks, Legs!

I added them prior to my cam and TC upgrade. Definitely worth the upgrade and you'll notice a difference in the get up and go. With a big cam and high stall TC, it's hard to get traction and launch it.

[Pearlj10]

I’ll also vouch for the 3.91s and put in a plug for the member in florida(?) that’s selling the entire 1LE cradle for a smoking price. Axles, better bushings, better suspension parts all in one! If I was to do it all over again, I’d seriously consider replacing the entire cradle. Much less work that swapping diffs, axles, bushings, etc.

[Pearlj10]

Post for the 1LE cradle for sale:
https://www.camaro5.com/forums/showthread.php?t=587440

[IneedAZ]

Originally Posted by Pearlj10

Post for the 1LE cradle for sale:
https://www.camaro5.com/forums/showthread.php?t=587440

Def the best way to go!! I had at least 4k in rear gear work in my car. I originally had the 3.73s installed and within a week the BMR black bushings they installed had failed from normal driving which shifted the Pinion angle causing a failure. Had it replaced with 3.91 this time and fresh set of BMR black bushings again and yet another failure..bushing fell apart a week later with normal driving. Now moved onto another shop and had them do another 3.91 with a Trutrac...This time lasted year and a half then failed, but wasnt the bushings this time, just wasnt shimmed right. Went to yet another shop, had new gears put in again and less than a year if made a lot of noise. This time couldnt even get axles out, they had to be cut to get rear out of car. Finally had bought a 1LE rear and had dealer install it with stock bushing...No noise, ran good, and lasted til i sold the car.

If you can find a 1le rear that should have the stock 3.91 gears, go that route and save yourself the headaches i went thru.