btw, found this on the rc-car setup website.
on the front shock tower .. see how the collar is positioned the right way? the little sleeve is facing downwards?
see how it is on the rear?
the collar seems to be inverted, the sleeve is facing upwards. i have a similar problem, but only the other way around (i.e. on the front shock bodies instead of the rear).
perhaps i got my shock collars mixed up.
but i wasn't aware the shock collars were for specific shocks and not interchangeable
