Originally Posted by Shqizy

Hi guys,

This tread seems to be almost dead, I still want to post my newest mod to tb-03 Diff :
I fitted new 12-3/32 Ball Diff gear of TRF502x !

upper tb-03 gear , lower TRF502x gear



finished Diff:


It feels really smooth and moreover now it can stand 13.5 with boost!

You need:
Tamiya 51438 TRF592x Ball Differential Gear Diff
12pc 3/32 or 2.4mm Diff Balls

--> file about 0.5 mm off of the end of the shaft from shorter diff joint



--> don't use the 0.5mm shim between the 850 bearings

have fun!