I use the Redline MTL as well, with no failures ever. Those who are particularly hard on transaxles, however, might benefit from Redline's MT-90, for example, which has more "cushion" in exchange for slightly more friction.
Oh, I've used the Redline MTL with open, Quaife, locked, and VWMS diffs without a problem, although SRS does recommend something thicker (perhaps even non-synthetic) for the VWMS clutch-type LSD. I tried the MT-90 for a short time, but didn't like the feel as much.
[This message has been edited by Eric Parham (edited April 08, 2004).]