Hello guys,

I have 2018 f150 with tow package. In last few times when I towed our TT (about 8,500 lbs), I experienced a weird issue.
I'm starting to drive from 0, when I move my foot from brake to accelerator, I feel a slight jerky movement. So far I wasn't able to find what is common (slope/weather/etc.) behavior to this issue.
It happened almost every time on my first trip, but barely happened on second one. I don't experience this issue without the trailer.

Any idea what it could be?

BTW, I always use tow haul mode when towing.

Thank you.

 

Its the trailer most likely. I would have someone look at the brakes and wiring.

Or your tongue weight was off

 

My trailer where the ball sits in has an adjustment to tighten the clamp to the ball. I dont know what you have.
It may be need ball adjustment?
Mine is a 1973 boat trailer, so new ones may be different?
See if you have an adjustment on yours.

 

Good point, but I did the inspection of the trailer last month. Actually I had this issue when I towed the trailer to the inspection and on the way back. Any chance there is a delay in releasing the trailer brakes?

 

Have you had it serviced? I do my trailers every year or 2 when getting inspected. Brakes and bearings. Check everything over.

Problem is trailer service places aren’t usually the best mechanics. But you may find a good one. The dealer sucks and over charge me but mine usually require repairs that require welding and parts they have.

If you are going to do all that and if you have time, balance and rotate your tires every year or 2.

 

Your hitch may have a little play in the receiver at the pin. And when you take your foot off the break the truck moves forward taking up that play. See if you can move the hitch back and forth with nothing attached.

 

Yes, I inspected the brakes and serviced the bearings a few months ago. All was looking fine...

 

Thanks, I will try. Towing this trailer (with the same truck) for last two years, never had this issue.
I thought it might be related to hill start assist, but I'm not sure...

 

sounds like the hill assist- i get that on mine. is it pronounced or subtle?

 

On any road you chose, lift off the brake, pause let the car roll hopefully forward a few inches, then accelerate....Do you feel it? I'm guessing you will as its not happening to the truck on its own.

But if the brakes are sticking on or not retracting.....thats going to take digging in to each wheel on each axle.