Best aftermarket rear diff for a street car????

[5.0LOfFun]

Anyone have an opinion on a good after market diff for a car that is gona be a daily driver on the street. whats the best brand and model out right now?

 

[90mustangGT]

Honestly, the factory traction-loc will do everything you need for the street and then some. They wear out, but are rebuildable. Get the Ford Traction-loc rebuild kit, about $40-50. I asked, and I got a lot of responce and this helped me:

http://forums.stangnet.com/showthread.php?t=497980

 

[87'GTstang]

All out best? Hands down a torsen differential. Smoother than butter, constantly biasing the ratio, and about as reliable as they come - there's nothing to wear out. It's amazing how they work really but work well is what they do.

 

[5.0LOfFun]

i know the factory unit is good but i had 2 other fox bodies one with a aftermarket diff and one with a fresh factory unit. the diffrence was night and day. so anyone have any good brands or models they can recomened?

 

[Daggar]

Honestly, the factory traction-loc will do everything you need for the street and then some. They wear out, but are rebuildable. Get the Ford Traction-loc rebuild kit, about $40-50. I asked, and I got a lot of responce and this helped me:

http://forums.stangnet.com/showthread.php?t=497980

 

[90mustangGT]

As far as traction goes, a factory rebuilt unit with the alternate clutch and plate setting will do very well. Many of the aftermarket unit's arn't really much different than the factory. Maby they use a coil spring instead of a S spring.

Mine is the factory rebuild with an extra clutch running the CPCPCPC setup, I leave identical black marks. Kind of scary if it's wet though.

 

[willys1]

Im getting an Eaton,,its my every day driver Did you mean just the posi unit? If you want a whole rear end,,A 9 inch Currie is the way to go

 

[FiveLtrRiceEatr]

auburn ected all the way

 

[DirtyD916]

^^ ya but its only like $500+.

 

[Highbredcloud]

I concur with zaxel torsen differantial...check out detroit true track as well...if the car is mostly stock don't bother with the traction lock...stock clutch packs will do...

 

[Blk91stang]

Not to steal the thread but will the Detroit True-Trac hold up to launches at the track? I thought I read Bob Cosby uses this and he drives his car like he stole it.. anyone!?

Also heard this diff is great for street cars as well!

 

[QDRHRSE]

I agree about the locker working the best. On a true street car I'd buy an Eaton or an Auburn. The newer Eatons might be a little better because they have mor durable carbon fiber clutches and are rebuildable. It's close. My only problem with the Auburns is that they are throw away units. Performance is about the same. A locker costs twice as much. The torsen I hear is really good for a road car, something thats not making a lot of power, or something that isn't launching hard.....really pricey too.

 

[04sleeper]

Honestly, the factory traction-loc will do everything you need for the street and then some. They wear out, but are rebuildable. Get the Ford Traction-loc rebuild kit, about $40-50. I asked, and I got a lot of responce and this helped me:

http://forums.stangnet.com/showthread.php?t=497980

Great link 90mustangGT!

I will save it for future use.

Thanks.

 

[mustangdaren]

I have been using a Auburn HD for the past 5 years with no problems. Still lights them both up with no peg legging.

 

[BlackDrop50]

31 spline trak-loks can be found at a junkyard, if you want a cheap alternative. It's very strong, and rebuildable. Only thing is you need new axles. That's what I run in my 347 hatchback, leaves 2 black marks and spins both tires pretty much all the time. It also stands up to launching on ET streets pretty well.

If you want a true aftermarket diff, like the others above said, the zexel torsen differential is pretty much one of the better ones. That's why it's in the Cobra R.

 

[Rick 91GT]

Eaton all the way, fully rebuildable carbon fiber clutches.

Mark Williams currently has them on web special $450

www.markwilliams.com 2nd page of the web specials

 

[blown1989saleen]

IMHO the Eaton hands down, it has the rebuild ability of the Trac-Lok yet is way stronger, i run one and love it.

 

[Bob Cosby]

If you're not going to race the car, the stock differential is fine.

For an upgrade, I had (and highly recommend) a Truetrac differential. They redesigned them this summer (uses 3 pinions now instead of 2), and it performed flawlessly in my 99 Cobra Factory Stock car last year (high 1.5 60 ft @ 3340 lbs). It is also very nice on the street.

The Detroit Locker is a VERY strong unit (stronger than the Truetrac, Eaton, or Auburn), and good for a mostly-strip car, but its not super friendly on the street like the Truetrac is.

BTW....I'll be putting a Truetrac in my 04 Cobra in a couple of weeks.

Good luck with whatever you choose.

 

[red ink]

i've transplanted from 4x4 to mustangs so i'll through in my 2 cents! ABR air locker! flip of a switch and you have traction