I think that with torsen diff like Quaife, even when one wheel is completely off the ground, it takes a while before the friction force goes away with in the drivetrain, so it would see sends torque to the other side. Now if the wheel has been lifted up, then yes, no torque transfer (vs the locking the diff with other types of differential)

 

DOH! I was downloading music from Kaaza at the time I posted. My bad!

-scu

 

Torsen differentials, like the Quaife, require some traction on both wheels in order to work properly. If one wheel is in the air, all power will go to the unloaded wheel and the car will go nowhere.

However, if the light wheel has some traction, the Torsen will split the torque so the majority of the torque goes to the wheel with the majority of the grip.

Kaaz diffs are clutch plate diffs that lock under acceleration. The harder you accelerate, the harder they lock. They have friction disks inside that can be arranged to provide 33%, 66% or 100% lockup. Kaaz diffs usually come in a 1.5-way configuration. This means they lock 1/2 has hard under deceleration as they do under acceleration.

Gary
Sheehan Motor Racing
www.teamSMR.com

 

What does installation of a front LSD run? It's in the deepest part of the tranny so I've heard up to $1k...

For ~$1k for a Suretrac I'd almost be tempted to spring for an STi 6MT with LSD built-in at that point.

 

Also keep in mid that the Torsen type is heavier than the clutch type. There is a way to "fool" the torsen by quickly applying the brakes. Fine for off roading, not so good for racing.

 

Wes,

For a first time job, I'd say give yourself 8-12 hours. You'll most likely want to poke around in there, clean stuff out, see how everything comes apart and goes back together, etc.

The hardest part is setting the backlash between the ring gear and pinion gear. It requires a special paste you apply on the ring gear so you can see the contact pattern. You'll need to assemble the 2 halves of the tranny, set the backlash, cycle the input shaft through several revolutions, then disassemble to check the pattern. If you got the pattern right, your ready to seal the tranny up with MIPG (Make In Place Gasket) and bolt it up. If the pattern is not right, you've got to try again.

It's all in the manual, and a first timer can do it. It just takes time.

There is one special tool you will need. It is used to turn the threaded bearing cups to adjust lash. I took an oil filter socket and used a grinder to cut notches in it so it would engage with the cup. Works great!

Or, we might be able to be talked into doing it for you...

Gary
Sheehan Motor Racing
www.teamSMR.com