I believe I'm going to answer my own question but I would like to hear your input or suggestions. I'm pulling a 5'X8' behind a Ranger. Loaded with a ZTR and pushmower. Trailer is rated at 2500LBs. The ZTR is strapped down. When driving, the trailer rocks the truck back and forth in a fwd and aft movement. Braking the truck is close to normal, not like the load is too heavy. Last year I was pulling about 500lbs less and did'nt notice it, This year is the first year with a ZTR ( Scag Tiger Cub). Is this common? or am I overloaded and undersized?