High-geared [6-speed] Transmission mod for T680 & W900 mod

Hi.
This is a High-geared 6-speed Transmission mod. It accelerate very smoothly.
The most suitable transmission for H-shifter or sequential.

–==specs==–
Forward:6 gears
Reverse:3 gears
Retarder:6 steps

This mod raise your tracking experience.
Enjoy ;)!!