transbrake with caltracs, help

My wild guesses:

Sounds like the shocks might be set too stiff, or the shocks are dropping the front end too fast, or your front suspension doesn't have enough travel.

Why are you setting the limiter so much lower than the stall?

What is your pinion angle? Have you tried both sets of holes in the Caltracs?

Where do you have the 9000s set?

Tire pressure?