Thank you for letting me know, I'll upload a new link shortly. Would you mind giving the numbers for the center of mass? Thank you.
Not sure if what i changed fixed it, or just folding it and unattaching it worked. Seemed like the attacher joint/angle on tractors was too high. But here is what i used. <component mass="3106" solverIterationCount="10" centerOfMass="1 1.2 1.923"/><component mass="19106" solverIterationCount="10" centerOfMass="1 1.2 -0.467"/>