Anything that has discs in, I add the LSD additive too. It can not hurt to add it but won't hurt to either.
The Detroit Locker is actually a violent locking mechanism and absolutely locks up the the left rear tire on a tight left hand turn.
The Pantera LSD acts more like the Tru-trac. I think you can test that it works by putting one rear wheel on the ground and trying to turn the other. You will feel the differential "lock" then.
I know of no other LSD that works like this. It is indeed a "unique" unit.
I'm wondering how many ZF's have been pulled out for a rebuild because they were thought to be broken?
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