Originally Posted by
kmas
is the gear diff or ball diff better, I noticed you cant get metal out drives on the ball diff, does everyone run gear diffs/front and rear?
Nope. I have the gear diff in the rear and the ball diff in the front. To get good rear grip you need to run the rear diff loose and in order to get the ball diff like that it's very close to slipping. Once it slips it starts to get crunchy feeling real quick. I use light coat of grease on the inside gears and a shorten spring. Clipped the spring so it just holds the 2 inside gears apart but no pressure on them like the stock setup. Only problem is the metal outdrives notch pretty fast. Pretty much on par for HPI's soft drive cups.
In the front I have the ball diff medium tightness.