overtightening the gear case would also lead to gear stripping.....
is he racing in stock class or mod? if it's stock, won't find much trouble wif it.....
bad crashes would also strip gear.....
we definitely need help... any1 tried write to tamiya??? perhaps we could get enlightened from them???? just a tot...
Originally posted by Evo_Uk
i was reading some other site and a guy was the only one with an evo3 and he talked about stripping the oneway gears and thought he done a problem somewhere.
Later on he said hefound the problem was he was tightening the too much so it was actually "warping the gear", so he loosened it a tweek and used some thread lock to sort it out and now its fine , done loads of races without needing to change it for ages 
I wonder if that would wrk, i would love to try it but my car is in bits ( getting ready for my local winter series ) , if someone else could try it and verify it that would be cool
thanks