I don't think you can go wrong with either the auburn or eaton limited-slip. Since the car will be street driven there is no need to get a "locker" diff.
The part I like most about Auburn is you have a choice of 28T or 31T. I went with 28T so I could retain my stock axles (I don't drag race so I shouldn't ever break them)
I like the idea of the auburn gear type differentals, but my question would then have to be, are they noisy like ive heard the detroits being?
and also should i spend the extra money on the pro series over the standard gear type diffs? jegs has the pro for $435 and the standard for $383.
Not very noisy in my car... But with the top down on and the exhaust roaring, is anything really noisy in my car? I can't even hear the radio.
I went with the standard unit but I do not plan for any racing. Just lots of hard corners and the occasional blast from 0 to the speed limit as fast as possible.
I'd go with the 31 spline Ford Traction lock. They are easily rebuilt, and even my 15 year old 7.5 SVO unit still spins both drag radials nicely. I'm going with that in the next upgrade of the 8.8 have for the car, until I get to the spool.
I think Auburn has a good replacement program with theirs, if you ever wear it out.
The Powertrax units look like a good drop in upgrade for these also. I was thinking of one for my F150.
I think im going to go with the Auburn Pro series, p/n M-4204-P31, with ford racing 4:10's, what do u all think of that, think it will stand up to my 97 cobra power and my lead foot?