Originally Posted by H I
What cause gearbox teeth to chip off on mini? I’ve replaced them heaps of times in last few races, I’m talking once every 2-4 meeting. Wasn’t like this before. I’ve checked pinion and diff but no damage at all. Just middle gears and I can’t see any rock or any thing like that inside. I’ve tried –lube gears – no lube –silicon splay all same result. I use gear diff build as per instruction with AW grease inside (not tight at all)
1 - Check universals, make sure grub screw is tight and pin holding shaft to axle is flush. Sometimes it works its way loose and your assembly gets loose but is still in tact. This can cause sudden but subtle stops when in motion and making turns. These abrupt stops can put pressure on all the gears.
2 - Check motor is mounted properly and pinion is tight.
3 - Check screws holding chassis together. They may be in but loose and not holding chassis tightly together
4 -check all bearings.