[Ryu James]

hey pt881,

you are fine to use that 2200kv motor on 4s in your buggy. it will be perfect. extremely fast and cool temps. i have had 3 losi 8ights and ran all of them on 2200kv on 5s and even tried 2700kv. the 2200kv on 4s is a great setup.

as for the ratcheting noise in the rear...that is "ok" if there is no binding but there is a way to minimize that sound or eliminate it. those shims you used for your center diff are actually able to be used in the rear diff bulkhead also to adjust the gearing mesh of the rear diff and pinion. you can use shims to adjust the mesh just right to eliminate that noise....and get smoother power transfer. but here is the most simple thing to do to eliminate that noise:

it will require you disassemble the car so you can access the rear bulkhead. once you have the rear bulkhead open take out the diff. then remove the rear cvd from the pinion gear. now, put fresh threadlock on your set screw that holds the cvd onto the pinion gear shaft. from inside the bulkhead push on the pinion gear as hard as you can. while doing this put on the cvd and lock down the set screw with the cvd as close to the bearing and bulkhead as possible. make sure there is absolutely no play in the pinion gear to move inward or outward. now put the rear diff back in and try the engagement. notice it any quieter? this should do the trick almost every time. does this make sense? let us know if you have questions.