Shark_Week

in hopes of not setting off a big gear oil debate, would it be ok to use mobil 1 75-90 LS synthetic gear oil. can't seem to find any mobil 1 that is just 75-90 synthetic here locally. not interested in using all the "exotic" stuff.

Rob Edwards

Dunno about the LS variant for use with PSD, but I have Mobil 1 75W90 in the GTS and it's fine.

9x8

I filled my GT PSD box with LS fluid, so far so good.
To my unexperienced view, PSD internals look very similar to that of conventional LSD - the same "wet clutch" design.

mark kibort

just use redline or swepco 75 90. but i dont think its that critical back there. redline does have the NS verson( no slip) for LSD rear ends , which is nice.

Shark_Week

Rob, i have looked around locally and could not find mobil 1 75-90, only the LS variant. i found some valvoline but it was a mix and not straight synthetic.