yes i use diff oil in my mt2. someone asked before in the thread and i replied. you put it inside the actual diff not the outside case. i put a little gasket maker on my diff case but you dont have to. it will not sling out. i believe i used 30,000wt the more you put the more locked it will be the less you put the more slipage you will have. i put about 3/4 to full in the rear and 1/2-3/4 in the front. works great and makes a real diffrence. sorry for posting so late, been busy and have not been reading the thread.