Originally Posted by
carpetburner
I have ... All it did was destroy the topshaft . The plastic KYOUMW513 gear lasted longer . My best results have been from running the sp idler and the carbon KYOUMW504C gearbox. Also I run my gearbox bone dry otherwise dirt and debri just sticks to everything tearing it up faster. Don't ask me how it gets in their but it does .Still cant believe a kit this expensive has such a week transmission
Take the entire transmission apart and use a toothbrush to clean the dif gear, top shaft gear and any remaining idler gears that you plan to use after shredding one. The plastic bits from a roasted idler can lodge themselves in the grooves of other gears causing the gears to have too tight a mesh in certain spots, this essentially causes a bind and will continue to eat idlers up as they are the weakest gear between the dif and top shaft.
Dirt easily finds its way in a trans case from the out drives which are literally spinning and channeling small bits of dirt in to the trans case. A touch of black grease on a cleanly built trans can assure smooth gear operation in my experience and does not attract the dirt as it's going to be present with or without lubrication.