Then your Slipper isn't doing it's job. Has nothing to do with the Idler. You basket guys are locking up your Pads. I get the original idea that we couldn't get anywhere near tight, but a slipper has to slip to do it's job. Loosen your slipper and save the spur gear. Your Tranny has nothing to do with it. If you go with a plastic idler as you sit now? You'll blow idlers instead of Spurs. Which do you want to tear down and replace?

A 32p correctly meshed Slipper slipping (manual: 2 feet on high traction suggested) Truck; will not destroy spurs, idlers, diffs, belts, etc. (of course, other than different variable issues such as pinning the slipper causing excess power on the plastic parts that were not designed for it.) I'm not talking down on anyone, or attempting not to. But we're locking these rigs up. Having the slipper tightened up is fine, but it must still slip for landings, punch control, and etc. That's RC 101 to 'not' lock that tuning option. (unless for a very specific purpose.) Plastic, metal, Unobtainium, it doesn't matter. When a Basket is installed (or get your slipper to work without one like me), you still have to have it slip. Otherwise, Idlers, diffs, Spurs go pop. Something has to give.