8.75 binds

Did you guys catch that? It only binds with weight on it.
Brakes or sidewalls or tires with different rolling diameters.Or the fronts.Or in the trans(doubtful)
Make sure your sidewalls arent rubbing, and that your tires are matched and aired up the same.Check for up and down, radial play of your axles by grabbing the wheel and lifting/dropping.
As an aside, what are your front wheels and brakes doing?