no i have not had any problems with the tranny and i have a center diff and forward only conversion in it but i have not done any other mods to it but lock it in 2nd. i ended up putting 500k oil in the CD and the front tires balloon a little less and with the duct tape inside, the tires only balloon on the outside and the inside stays in. it handles a little better with the stiffer shocks and new oil in the diffs. i finally finished painting the body for it. tell me wat ya think.
and im thinkin about getting a 1/8 buggy roller and putting all the revo's brushless stuff in it then making my revo nitro again.