They work great in a Tamiya trk too! The dual Buehler 12v's & dual coupler have been in my white 6wd greater than 10yrs with never an issue. All four trks use these same motors & coupler, lots of power & long run times on 2700mAh packs.
Here's what the 3:1 gear looks like inside the coupler.
3:1 coupler with 2:1 hilift tcase , both 6wd Globes
4:1 Carson unit, no reduction in coupler, this powerplant is in my kh dump trk
I tried the coupler with 8000rpm 7.2v motors, very noisy
