We went out to play with the trucks this morning and after bringing the LST back after the first set of lipos, I noticed that the rear diff felt notchy when turning the wheels by hand. And all of a sudden, it locked.
I took the diff out again opened it, cleaned every part and the problem was a single tooth broken from one of the Losi output gears. The severed tooth was floating around in the oil and locked the diff. The Thunder Tiger spider gears are fine so I replaced the Losi output gear and put everything back together I'm out of diff parts and diff lube.
