which differental do i want?

[blkstangman88]

Auburn, eaton, or a detroit? im going with 31 spline and 4:10's, just wondering what one would be a better pick for drag/street?

 

[JBeezy53]

I like the auburn limited-slip. You want a limited-slip not a locker, right? I mean will this car will see plenty of street time?

 

[blkstangman88]

yes this car will c street more then drag. but since im installing gears i might as well do the whole thing.

 

[JBeezy53]

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.

 

[blackcloud50]

Eaton

 

[srothfuss]

The Auburn Gear type LSD would also get my vote. But you really should call the folks at auburn and talk to them to see for yourself.

Auburn Gear

Applications Page

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)

 

[blkstangman88]

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.

 

[blackcloud50]

zexel torsen also has nice gear driven differentials

 

[srothfuss]

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.

 

[autoartist]

Sorry for my ignorance, but what is the difference b/t
limited-slip and a locker? What is a locker?

In reference to a post up top.

Thx

 

[srothfuss]

Limited Slip allows both tires to spin when straight line acceleration is needed while still being able to "open" up around corners.

A locker, simply locks both of the driven wheels together all the time. (Think of an old 4x4 in 4 low on conctrete)

 

[blkstangman88]

but my problem is i dont want to install gears and have to rebuild the clutch pack after how ever many miles, i just want the geared diff.....lol

 

[$uperstang]

With the simple bolt on stuff you have I would not waste my money on a rear diff. Just upgrade to a 31 spline out of an F-150 and that will be fine.

 

[blkstangman88]

this is for my 97 cobra, no one ever responds in the svt forum, but the axles should be the same right?

 

[rd]

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.

 

[2000xp8]

Go 31 spline.

I have the auburn and have been beating on it for i'd say 8 years or so.
But seems not everyone gets that much time.

An eaton is stronger and rebuildable.
But is quite a bit more money.

 

[blkstangman88]

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?

 

[blkstangman88]

Or the Eaton p/n 362-19588-010 limited slip, those are what ive narrowed my choises down to.

 

[blackcloud50]

FWIW....
I street drive primarily. Have 3:73 gears with 500 rwhp and I went with 31 spline Eaton.

 

[2002BLGT]

auburns sucks...3 of my friends broke theirs last year ...I would get a ford trak loc or an eaton ......