+1 for the Amsoil severe gear lube. I switched mine at 56k...like 1,500 miles ago. No problems. I like to think the ride is smoother, but I'm sure I am just trying to convince myself because I paid like 12 bucks a quart for the stuff.

I also use the Amsoil gl4 tranny stuff...I definitely feel the difference there.

 

I see you use Motul oil for rear diff? Any complaints