Shaky towing experience, please advise

Need-A-Vacation wrote:

What was the tire pressure of both the truck and trailer tires??? What tires are on the truck, p-rated car tires, or LT's???

Tires were brand new Michelin LTX/S2 P275/55/R20. Standard (cold) inflation is 35 psi. I had them 35 front, 40 on back on leg A; then I increased them to 40 and 40 for legs B and C. I asked about LT tires when I got these, but they said they didn't have any for that size.

Need-A-Vacation wrote:

Any water in any of the tanks if behind the trailer axles?

Leg A I had maybe 5 gallons total in gray+black tanks which sit behind the rear trailer axle. Leg B I had more, 10+ gallons. On leg C, I drained everything completely in an effort to eliminate that variable.

In all three trips, I had zero water in the fresh tank (which is at the front of the TT).

Need-A-Vacation wrote:

Maybe YOUR trailer needs a little more tongue weight? It can vary between different models and manufactures, up to 15% or so for a stable tow.

If your fresh water tank is in front of the trailer axles, maybe fill it at least 1/2 fill and take a drive to see how it is??? Couple members are very good at figuring the percentage that would be on the tongue if you give them the measurement from tongue to center of the tank, then center of the tank to the center of the trailer axles (middle between front and rear axles).

Thanks, this is the kind of input I was looking for.

PS As for the 180 lb gross weight discrepancy, I was standing outside the vehicle during all three weighs (so I could reach the call button) and I weigh 180lbs! Maybe I was standing slightly on the scale during the first weigh but slightly off the scale on the second one? That might explain it.

My hitch is a Husky Centerline TS with 800-1,200 lb spring bars. This one does have WD + antisway. It was set up at the dealer for an empty trailer (whose dry weight is 5080 per the manufacturer).