Hi there--I pull a 12' Coleman. With the old TV (Honda Odyssey) it pulled well, but jerked a bit (forward and backward, not side to side) when the road surface was bumpy (e.g., slab concrete). Now we have a Chev Traverse which is rated for more towing capacity, but the jerking is more pronounced over bumps. Both TVs pulled smoothly on smooth pavement. Any suggestions what I should check? Thanks in advance.