If you want to be a good car mechanic you must not be afraid to rebuild the diffs and the gearboxes.
Its not too tricky, just the shimming when you put the diffs back in the cars is very important. The shims are the thin washers that allow you to mesh correctly the input gear with the Crown transfer gear (thats the white delrin ones) you must make sure they are not too tight or loose and grease correctly with a ring gear type grease.
You must be at one with your car to fully master the efficient and silent running that my stealth FS Has acheived
