Push and Suck

Dodge guy, I'm thinking he has an enclosed car hauler not an open one like used by the commercial guys. It would not be any different than a travel trailer.
Barney

Is he using a WD hitch? And/or using sway control? You will almost always get the push/pull from semis. I get very little with my setup. If I have the trailer loaded properly it does not get any push/pull. If not I get some.

If his numbers are correct then he is too light on the tongue. With an 8900lb TT he should have 1200lbs on the tongue. Your Car hauler is different, they have no sail area so you can go lighter on the tongue, usually 10% is plenty for those types of trailers and boats.

mike243 wrote:
Snip...I run 2 sway bars and don't think 1 of the high dollar hitches can stop it or you couldn't steer the truck but having never used 1 i'm not sure on that

Note: Moderator edit because of stupid mistake I made! :o

Yep, One of those "high dollar hitches" (think Hensley) will stop it and the truck steers great! :)

Sorry about the mistake on your post above. I hit "edit" instead of "quote" when trying to make this post.
Barney

I found a barely used Equalizer 4 point 10k on ebay that stopped it for me. I had no sway before and very little push pull so it was an easy fix. Perception might be part of it. For some, it might feel like he's all over the road while the next guy feels a little trailer wag.

Try adjusting the tongue weight. Usually more is better (don't overload it). Move some things on the trailer forward. Sometimes just a little will do it.

Try putting tire pressures at max, both truck and trailer.

What kind of hitch does he have?

I don't think it can be helped,my camper is 28' and no sway but still get the same affect from some trucks,its due to the large area and the longer the worse it is.some of the newer tractor/trailers never move my rig but older will shift it at times,I can guess which 1 gets better mileage ,I run 2 sway bars and don't think 1 of the high dollar hitches can stop it or you couldn't steer the truck but having never used 1 i'm not sure on that

Note: Moderator edit because of stupid mistake I made! :o