This procedure has been very successful
B-FAST R/C PERFORMANCE
Differential Break-In Procedure
1)Clean all parts and work area
2)Follow owners manual for assembly instructions
3)Lightly Coat Diff Balls with Pro Diff lube, thoroughly lube Thrust Bearing with Pro thrust bearing lube.
4)Snug diff screw just until gear will not turn while out drives are held.
5)Assemble transmission per manual
6)With assembled transmission in car and car on a stand, hold one rear tire while lightly applying the throttle for about 20 seconds (about 1/4 throttle, No tire swell). Repeat while holding opposite tire.
7)Tighten diff screw about 1/16 of a turn and repeat step 6
8)Repeat step 7 two more times.
9)Slowly loosen diff screw a little at a time so rear tire turns with little or no resistance while holding the opposite tire.
10)Slowly re-tighten diff screw a little at a time until resistance is felt while turning one tire and holding the opposite.
Drive car and adjust diff to suit your driving style.
Do Not let the Diff Slip at anytime!!
To adjust the diff.
Looking at your CR from the rear
Place the long arm of a 1/16" or .050" Allen (hex) wrench thru the left outdrive slot and engage the slot in the diff screw head. You might have to turn the right rear wheel while applying slight pressure towards the transmission with the Allen wrench to get the wrench into the screw head.
Turn the right wheel righty tighty or lefty loosey.
Check your slipper pads, if they are not installed correctly your spur will wave