Hi there, we ran the tt01 for the 24 hour race in Jackson NJ. That car is incredibly sturdy!
Anyway, I am no expert and your problem could come from different things but here are some suggestions.
It could be your steering servo that is tired. When a servo gets too old and has been used a lot, it can start acting funny.
It could also be your servo working too much and overheating. If that's the case it should come from your EPA that is not adjusted properly. I mean your EPA (or dual rate) throw might be set further than the actual steering possibility of your car. So when you're steering the servo tries to go way further than possible.
When not moving try to steer all the way and see if the servo is forcing further than the point when the wheels block. Then reduce your EPA or dual rate until the servo stops making noise.
If that doesn't work, try replacing your steering servo maybe? Also check all your wiring to make sure nothing is susceptible to short circuit?
All in all I guess it's always good to start with the obvious, which in your case seems to be the steering servo.
Hope this helps.
Last edited by Joe Kimble; 11-19-2012 at 09:17 PM.