put the ball diff in the front and the locked one in the rear this will work better. also wat tyres are u using ? i drifted a stock tt-01 with a 540. so im thinking it must be your tyres. if they are tamiya drift tyres u realy need a motor about a 15t double for them other wise get sum abs pipe tyres cheap and most effective far suppiror to pvc pipe and a 10th of the price of yokomo's.