Moser 10 bolt girdle
 

I bought a Moser 10 bolt girdle for my 01 WS6 and so far I've been happy with it. I've been to the track a few times since I put it on and been a little harder on the rear end and still no gear noise (yet). I want to change the gear oil and have since lent the allen wrenches out that fit the fill and drain plugs, only for them to never be returned. Does anyone know what size allen wrenches the fill and drain plugs are on the Moser Girdles (7105)? I tried doing a search, but if there is a thread on here about it I missed it, and the Moser website doesn't call out the size.

I believe TA Performance makes those covers for Moser. The TA Perf 10 bolt cover I have uses 3/8 and 1/4 allen wrenches for the plugs. FYI don't use the top plug in the cover for setting the full level, it's too high and you'll overfill the rear. Use the fill plug in the side of the housing for the level, plus it's easier to fill the rear from that plug too.

Great, and thanks for the tip. I probably would have went for the one in the cover. Is the plug in the housing a 3/8" allen too then?

the housing plug is typically 3/8" square,a 3/8 ratchet with extension.

Ah, yes, you're right.