5
1.
2.
3.
VERY IMPORTANT
DETAIL
ALIGN FLAT SPOTS
ALIGN FLAT
SPOTS
CUT OFF
FACTORY PRE-ASSEMBLED
DIFFERENTIAL BREAK-IN AND ADJUSTMENT:
The ball differentials in the M18 PRO comes pre-built from the factory, but you must still
perform a proper break-in on them in order to have them perform properly and give long
life. The key is to gradually tighten the diff to break it in properly and obtain the correct
tightness. DO NOT overtighten the diff initially or damage will result.
When initially tightening the diff, the screw should be tightened enough so that diff cannot be rotated
while holding both
When breaking in the diff, the balls create a groove in the diff rings; this is normal and essential for proper
operation. If you overtighten the diff initially, the balls will mar the surface of the rings (and damage the parts)
instead of creating a proper groove in the rings.
Adjusting the differentials is easy to do. Tighten the diff until you feel some resistance; you do not need to make large adjustments - 1/16 or 1/8 of a
turn will make a noticeable change in diff tightness.
Reassemble the car, run it for a few minutes, and then tighten each diff a little bit. Repeat this several times to break in the diff and set the correct
tightness.
930020
B 2.4
930407
BB 4x7x2.5
907270
2.5x20
960025
N M2.5
930025
BA 2.5x0.8
930812
BB 8x12x3.5
