Originally Posted by richie_s999
I've gotten to know quite a few people running chump, most common failure is motor at about 8hr mark on m20 motors, and are now running 3 core rads to help avoid engine failure. trans and diff failures are usually do to abuse by the drivers but do happen. A lot of teams have a set of diffs through the gear range depending on the track too.
I don't think you are allowed to change the rear end ratio in chump?