I'm having problems with the RPMs on the Rear wheels and Rear Differential on the DPMP Pessima that I'm fixing. The RPM goes from -100rpm to +100 while not moving at all. Here is a quick video of what is happening: The Drivetrain components are exactly the same as on the AWD Covet which works just fine... I have a suspecion that it might have to do it using the stock pessima suspension JBeam... If this is the problem, could you assist me in fixing it? Thanks!