i just recieved my new mt2 g 3.0, as usual, i diasassemble the vehicle to lock tight screws, set spur gear mesh etc. when i removed the entire rear bulkhead assembly, i noticed that there was alot of slop, and not a smooth motion of the rear ring & pinion. i called hpi, and there gonna send me a shim kit, as i guess some of these need to be shimed properly. just wanted to give some of the mt2 g 3.0 owners a heads up. the fron diff. felt really good, but ill still disassemble it and check it.