Look folks... this has all been gone over in the 100s of
posts on the original EvoIII thread, concentrated to:

1) "problem" is largely caused by builders cranking down hard
on the gearbox screws, warping the plastic & stripping threads.
Gears go out of mesh, they start binding.

Replace the 3 screws with machine-threads, longer ones are better.
If you only just snug the screws tight, you have no problems.
I have tried 8 different gearboxes (5 cars) and its the surefire solution.

2) various ways have been tried to cure oneway gear stripping,
from shimming the diff to padding the bevels' bearings tight to
the gearcase. Later was the discover that the shaft is 2mm short,
Tamiya issues a new TB02 shaft and Tech has a 3-piece stick.

Gear stripping, although not preferred per se, does not leave your
car stranded mid-race & DNF. Removing & changing the gear is a
2 min job if you can be bothered, otherwise just live with the
clicking & leave till your next rebuild.



I love the EvoIII design, still admire it every time one's on the
bench even though amazingly it is now over a year old.

Tamiya did a great job and it will be a hard act to follow.

Like all, wonder what more EvoIV can offer.