Phantom Grip LSD kits: Anybody with direct experience??

Sounds too good to be true.....

How well do they work? What is the durability? How expensive/difficult are they to install?

My install would be on a RWD autocross car. Any other notes/comments are appreciated.

Rog

I have no direct experience but adding springs to put pressure/bind on the spyders gears sounds hokey at best. I would not expect more than 15% bias with this approach.

They have been around for a long while though so maybe there is some usefulness?

The name is very apt. The grip, like a phantom, is never there. Hence, "Phantom Grip."

They live up to their name as the grip can be sometimes "Phantom" in nature.

They do work okay and are much better than nothing.

They seem to need to warm up a little to work really well, but overheat them and they will stop working, just like a brake rotor or a clutch.

They can wear out the diff carrier with the extra side load.

Some installations require the differential to be re-shimmed.

Cannot be easily removed once installed.

No direct experience, but I've followed threads that have asked the same question.

General concensus is that they are better than an open-diff and are relatively cheap compared to the name-brand units. Another very common observation is that the name "Phantom" is appropriate when the "other guys'" diffs are used as a baseline for performance.

Other than that, I got nuthin.

Do a google search on GRM's domain for phantom grip. There's been threads on here where people had their diff turned to E36 M3 from them. "Too good to be true" seems to be about the consensus from what I've read. Note that I have no direct experience. For the amount of work involved, I'd put the extra few hundred in and do it right.

No direct experience.

Hearsay from those who have them generally is that they work, but only faintly. Some (VW folk?) said it did cause wear on their differentials.

Tales of horror only seem to come as hearsay from those who do not have them.