I might have an issue I never thought of though. I run a 2 speed, I won't be able to use the motor brakes as the one way in the trans will just allow the trans to free wheel anyway. Anyway around this? I know I could switch to a single speed, but is there any other mods to keep the two speed?
You are right, most 2 speeds use a one-way bearing, which makes using the motor for brakes or reverse impossible. You'll need to lock it in a single gear, or use a center diff setup, or some other mechanism (like the old style emaxx transmission where there was a shift fork to manually shift).