Originally Posted by GSM Storm

Well after my son running the Spec-R gear diff in his Mi4-CX in mod for a few race meetings I have found that they are shit, the plastic gears can not hold up to the power that a 4.5 turn motor with boost and turbo can put to the ground, 4 drivers that were running the Spec-R diff on the weekend had them fail.

They either have the slot flog out were the pin sits or they just strip the side gear, 2 x 5min runs and that’s it, I can get a ball diff to do that.

Spec-R need to make some steel gears and fix the slop in cases were the out drives go in, on the Mi4 diff anyway, I checked a Tamiya diff and they did not wobble as much.

Regards
Gary