Best Limited-Slip Differential

JimC said:

Try car-part.com and put your location in for the search. You can also try newtakeoff.com.

The stock gear on the 2005-10 was 3.31. A 3.55 was optional but I don't think that it was available on the 4.0

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I am pretty sure stock 8.8s can be found with 3.06, 3.31, and 3.55 (my car had 3.55 stock). However I have seen them for sale with 3.73, 4.10, 4.30, and 4.56 already installed.

its not any every day find, but they can be found. especially since people swap to either a 9 inch or a pre built 8.8 often.

Though over your budget, I think this is your best option for an LSD. TruTrac is not an LSD differential. I use the bigger version in my 8.8 at the track and on the street and it performs wonderfully.

http://www.jegs.com/i/Auburn+Gear/109/542048/10002/-1

^^ For that price, plus the install kit, plus the labor to get it set right... you're better off buying a used 8.8

cbass said:

^^ For that price, plus the install kit, plus the labor to get it set right... you're better off buying a used 8.8

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Indeed. Way better off getting a used 8.8. Hell, even an old worn out one can be refreshened for like $150 total. Grab an old one for $400, rebuild the clutches for $100, swap pinion flange ($25), replace pinion nut with motive seal kit ($30), and be on your way.