Quote:
Originally Posted by AlibyOK
I am towing my 2619 with my 2011 AWD Toyota Sienna. It has a weight distribution hitch and a P2 brake controller.....
....I found last weekend that the trailer began to tug cyclically at the car as soon as we got onto the section of the highway that was constructed of typical concrete slabs. If I went at 60 mph it was gone, but at 55 mph it was target jarring.....
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First of all. No matter what you do to the TV/TM combination, you will always have a chucking problem on this section of highway at 55 mph. The chucking is a result of the wheel base of the Senna and the distance between the Senna rear axle and the TM axle. So don't drive at 55 mph or get a different tow vehicle. Note that a tow vehicle with a different wheel base will also have this problem but at a different speed.
What can you do with what you have?
Weigh the Senna and 2619 as suggested Mr. Adventure above. The tongue weight of the TM should be 15-17% of the Gross Vehicle Weight of the TM. Adjust by repacking the TM. Also avoid packing heavy in the back of the Senna.
Double check the WDH settings as suggested by Mr. Adventure above.
Make sure the Senna tires (at least the rears) are inflated to the max rating on the tire side wall while towing. Upgrade to LT tires?
Upgrade the rear shocks on the Senna to heavy duty air charged shocks. Your existing shocks may be ok when lightly loaded but can't handle the extra dynamic load while towing.
If the 2619 has 14 inch tires, make sure they are inflated to the max setting on the tire sidewall (50#). 15 inch tires on this size TM should be inflated to at least 55#.