RCKNIGHT- The diffs on all of Xrays touring cars are externally adjustable, just stick your 1.5mm hex wrench into the hole in the long outdrive and turn the opposite wheel....easy as pie.... also as thecar sets it only takes 5-6screws to get either diff in your hand... and it doesn't upset the suspension setting either like on the TC# cars... because the suspension is bolted to the bulkheads the entire side of the car you choose comes off as one assembly.... agian more design genius....