WaveTrac Differential?

[full quack]

Wow, can't believe I forgot to post after I installed the Guard clutch pack into my ZF diff.

Works like a charm, hooks better at the exit of corners, the rear end no longer get twitchy coming hard into a corner apex while downshifting & on the brakes.

A marked improvement over the stock internals.

Thank you Monty & Guard.

Mark

[gsxrken]

What's involved in servicing or swapping the diff on a 930 box? Does it require removal of the transmission, or is there a way to tackle it in place?

[Jim2]

Originally Posted by gsxrken

What's involved in servicing or swapping the diff on a 930 box? Does it require removal of the transmission, or is there a way to tackle it in place?

Good question. I bought a used quaif that I'll install this summer. Wondering if it's possible to do so without having to reset the pinion.
As long as crown to side bearing is accounted for along with preload I don't see why not, but I'm not an expert, just a hack.

[full quack]

The actual removal & reinstallation of the diff. can be done with the engine & trans in the car.

However, since the new diff carrier and new carrier bearings will undoubtedly be slightly different in size from what you have in there now. You will need to at least check the ring & pinion gear engagement tolerances.

I cannot see how any needed adjustment there, can be done with everything in the car. Pretty sure this can only be done correctly with the trans sitting on a bench. Ring and pinion adjustment is accomplished by adding or subtracting shims between the carrier body and the carrier bearings inner races. You bolt it all togehter, measure what you have, calculate what is needed to obtain the correct running toleraces, take everything apart, install the corresponding shims that you calculated are needed. then reassemble.

I changed out new carrier bearings only, many miles ago when I rebuilt me tranny. I checked the running tolerances, and got lucky and they where within factory range. Others may not get this lucky, and I seriously doubt, anybody would get this lucky with a completely new carrier housing.

My .02 worth.

Mark

[Matt Monson]

Hello,

Mark is right. To reset the ring gear backlash and bearing preload with the installation of a different differential requires that the gearbox we on a stand and not in the car. Some people take their chances and put the two differentials on a flat surface, measure the bearing locations on each, guesstimate the shim thicknesses and just go for it. If you screw it up, it's only going to cost you a new ring and pinion...

[drmatera]

Juan, I think Kevin here at KMW has a used G50 posi unit if you just want a replacement