Building a differential for the mini starts with a TA03 Ball differential. The diff. parts should be assembled as per the Hop-up instructions. The only deviation from this should be in your choice of greases. Don't be afraid to experiment with different greases to tune your car. Softer grease should help the car turn better on a tight course, while thicker grease should help the car "bite" more off the corners. For the M03L at the Tamiya America Test Track, I use Tamiya's Anti-wear Grease, this provides a lot of lock-up for the differential. Tighten the differential until it stops, but do not apply excessive force. Make sure the diff. spins smoothly. A set of lightweight diff. balls will improve your chances of achieving smoothness. A differential that is set too loose will not only make the car slow and difficult to drive, but eventually will come apart. Large Mortgage Loan car breakdown insurance
