in europe every single motul gear oil that is 75w 90 is gl-5. The manual says we need gl-4.
I use amsoil mtg which is gl4 and i am very happy with it. I did use motul 90pa in my t-case and rear diff but they are not fully synthetic.

 

Motul makes some great stuff...Just changed over to that in rear diff and tranny. I even use it on my race quads.

 

Got motul in my shep built, no problems here!

 

motul makes amazing trans fluids, many many rally teams use them and ds1 is one of the only places that can get it I believe.

 

I have been using Motul Gear 300 in my 5-spd. for about 40,000 miles now. No problems so far.