Shortshifter TRD - Issues

[totta Crolla]

The OEM lever has quite a lot of play and the ratio is lower.
Combine less play with faster change speeds and it will show up issues further down the line. Every T50 I have looked inside has had worn shift forks and when this happens the gearchange gets 'clunky' because the shift collar goes slightly crooked as it slides across the gear.
The 'clunkyness' get masked by the slop and slower ratio in the OEM shifter.
I'm not saying that this is the actual case for you but it is worth considering.