I replaced the traction control module. Fixed :)

Probably, but usually would show an error

1. I have the manual.
2. Brakes release and engage properly
3. forward motion from joystick works properly
4. reverse motion for right drive motor work properly
5. reverse motion for left motor works, but it is at full speed so I automatically turn left in reverse.
6. Once I go in reverse, the left wheel seems stuck in reverse. It will stop when I disengage the joystick but if I try to go forward again the left tire still spins full speed in reverse. Once I power cycle I can again move forward with no issues.

https://acrobat.adobe.com/id/urn:aaid:sc:VA6C2:e5aca48c-e085-41b9-b1c7-f293344a9799
Download service manual, I would verify joystick output to reverse first and verify brakes releasing