3906 diff

[Rnemhrd]

There are about 5 problems with those diffs besides the gear mesh. If you are going to keep using traxxas diffs get the 3905 diffs. They are a little better, and can be found new on ebay fairly cheap. Otherwise get 1/8 scale diffs and forget about it.

hi all...took some more pics with my digital camera. this time its the front diff as rear diff is back on truck. seeing as you need a good camera to take close up shots these may be a bit weired looking cause they where took through an engineers eye glass to add to the magnification.

basically the smooth shinny surface is the contact point. these gears are the original 7 year old front diff (3906) so no chance of your diff ever wearing in, just wearing out.
the previous post pics where rear diff (3905) which does not mesh or wear better. both these diffs have been modded to take m3 c/sunk screws.









see how the contact on the bigger ring gear is such a small area on the tips of the teeth that the corners are chipping off, these chips just go around in the diff and just add to the murder going on in the casing, i think 8th scale diffs and hybrid bulks are on my next shopping list from monster,
i trust the teeth are cut correctly on these larger 8th scale gears??
thanks all...