3906 diff

[redshift]

Some diehard Maxxers just won't admit flaws lol. Chris I have at least 3 pinions that are in worse shape than those, same thing, angular contact is just off, plain and simple. And the rear edge of the teeth is razor sharp, fronts are more or less untouched.

That, combined with excessive pinion 'rock' from undersized bearings that are also too close together. Shimming will not fix this, you have to consider at least the pinions as expendable. My spurs actuallly have never shown wear, they are significantly harder than the pinion. Which of course makes them somewhat brittle, I've seen more than one spur chunk itself. Just strange that ONLY my pinion gets whooped.

I have tried shimming, and it only makes the gear contact crunchier, that's both with spool, and diff. The RRP ring/pinion were supposed to be better, but they still cant overcome the rock issue. One of these RC co's needs to make a physically larger diff to tolerate the stress, or at the least a little longer pinion shaft for better bearing spacing.