What rear end for road racing?

[andykbob 10]

Hey Guys

I have to rebuild my 9" rear end and I also want to start racing on the road course so I was wondering what is the best kind of set up I should have? Posi-track? limited slip??

 

So I was told its a posi trac but the pucks??are worn out, so only one tire spins.

What can I do? Just replace the pucks?

 

Also, where do I pick up a good rebuild kit?

Edited April 27, 2011 by andykbob
adding more info

[RogerC 136]

I would say a locking setup with a gear ratio to optimize your engine & trans. You should check over on corner-carvers.com, there's much more track knowledge over there.

[69gmachine 15]

The torque sensing differentials are the best as they apply power smoothly. They also don't have clutches to wear out. The Traction Loks work fine, and since you're a beginner, you probably won't stress it too much for a while. Have it rebuilt and later you can upgrade to a torque sensing style. I would avoid the lockers. They come on and off hard and can upset the car.

[6T9rustang 11]

The torque sensing differentials are the best as they apply power smoothly. They also don't have clutches to wear out. The Traction Loks work fine, and since you're a beginner, you probably won't stress it too much for a while. Have it rebuilt and later you can upgrade to a torque sensing style. I would avoid the lockers. They come on and off hard and can upset the car.

 

:thumbup1: Agreed!

[andykbob 10]

so just to be clear, a posi trac is NOT a locker correct??

[6T9rustang 11]

A posi trac is a locker.

[6T9rustang 11]

The name "Posi -Trac" was originally used by GM as the brand name for its original equipment: a positive locking differential. After a time, "posi" became a popular name for limited-slip differentials of any origin.

Edited April 27, 2011 by 6T9rustang

[DRASTiK 22]

posi is not a locker. A locker physically locks both rear axles together and applies 100% power to both simultaneously. A posi, or limited slip, also provides power to both rear axles, but not at 100%. There is more to it, but that's it in a nutshell.

 

As said above, stay away from the full locker and stick with a limited slip for your application. Driving a road course with a locker will cause the rear end to jump around on you when it's locking/unlocking upon corner entry/exit. I've got lockers in my jeep for rock crawling, but I'll be putting a limited slip in the stang for on-road driving/drag racing.

Edited April 27, 2011 by DRASTiK

[EastYorkStang 63]

When I was changing my car to a road racer I installed a Detroit Locker Tru Trac rearend. So far so good going on three years noa nd no problems. Knock on wood....

[fvike 173]

I have a TrueTrac, (torsen diff) and I'm very happy with it's performance, both on the road, drags and road race. Just remember that in needs mineral fluid. There's a whole tread about that on corner-carvers.com.

[DRASTiK 22]

I've also heard good things about the TrueTrac limited slip by Detroit. Both from racers and off-road crawlers.