hi everyone i have a 04 257B 3400 hrs great machine, today I was moving some mud around in the yard and noticed that the machine was pulling to one side like a car would if the wheel alingment was off. So I continued to use the machine and then i noticed it was harder to turn left and i could feel the joystick pulsate, the motor would really have to work to turn the machine left which was really weird and has never done that before so i took the track off to check the wheels or if anything was broken looked fine. while I had the track off I turned the machine on and placed the joystick all the way to the top left corner so just the right side of the track would spin and it wouldnt move at idle, it would only move if i had it at half throttle. Usaully it would spin freely at idle. So heres the question whats wrong with it and would I need a new motor (or whatever you call that thing) on the the right side?? Any ideas will be a great help thx