Originally Posted by Chris24
Navigator has 9000 tow capacity in 4 x 2 mode. The trailer weighs 6100 dry. The hitch weight is a beast at 840 lbs. The Navigator also has heavy duty tow package. When the trailer is hooked up the back of the Navigator wheel wells are almost on the tires. Then when you start the car, the back lifts up as the air ride suspension kicks in. I will get it checked out. I think the best advice is to start over. Going on a 65 mile trip tomorrow and a 124 mile trip nect week. Will take it slow. Thank you all for the help. I greatly appreciate it.
Yeah I think tow capacity doesn't matter in this case.
I'm sure your payload sticker is in the 1500-1600 someodd lb range.
Payload is the measure of weight straight down on a vehicle. If the advertised tongue weight is 850, it's likely to be more like 950 in reality, maybe even over 1000. Then of course you deduct the weight of the hitch itself, and you and passengers and other gear... and you start getting close fast.
The smooth ride suspensions just aren't designed to "control" the weight when coupled with weight moving side to side way behind the vehicle. Your hitch point becomes a lever point that is exerted upon in many different directions at once..... think about it for a second.
When the rear of the trailer moves, yaws, jars, or rolls... or some combination usually.... the trailer then exerts all of that weight and energy of the trailer moving plus the tongue weight to a single side of your rear suspension.... it lifts one side and compresses the other in a roll. It pulls side to side in a yaw, and it pushes and pulls up and down in porpoise. With the current state of highways, it's almost unavoidable.
Consider all of the weight of the trailer leaning to one side in a roll, it's literally exerting that weight to the hitch.
When the suspension can't return the trailer, the weight lingers and the rear of the truck starts to track that way.... but of course, the trailers suspension will eventually return the trailer, but when it does, the truck is lagging behind, and the trailer sort of oscillates to the other side to some degree. This oscillation starts the sway, which can increase as the two fight each other for who's in charge.
The job of the suspension is to force the trailer back in line, to resist and return. And this requires a stiff suspension.
Add in a nose high truck, and you got yourself some white knuckles as the steer tires can float, especially when the trailer dips nose down.
I have a hard time believing they let you drive off like this. That's a shame.
I'd even be *slightly* skeptical of 3/4 ton truck with this trailer. I'd feel very comfy in a 1 ton.
Sorry you're having to go through this, it can be a hassle for you.