Shimming camper to minimize side to side movement

We take our truck with the Hallmark popup off road, not hard core four wheeling but rough steep roads. I screwed some ¾ x 8” boards on the sides to fill the gap between the wheel wells and the issue with the camper shifting around was solved.

Also, to ad to my previous question, do those that use guilds find they rub the finish off your bottom/sides of the TC?

I've had mine shift. 3/4" stall mat and fastguns tightened as per manufacturer. I think it's just gonna vary depending on the bump size and speed you take it at. Don't think I've had it move on pavement. But on forest service or logging roads, anything is possible.

thanks Jim

I don’t know if it is common or not. I know that sometimes mine moves. I think it has more to do with road than anything else if it doesn’t move all of the time.

How common of a problem is this??

I usually have to adjust mine after the first trip but don't recall having to readjust them again.

billtex wrote:
Man, you Guys over think everything. Put the camper in the bed, tie it down and go.

Perzactly!

JimK-NY wrote:
If you do have shifting, I would find out why. Otherwise you will need to frequently adjust the tension and I suppose the camper could eventually shift substantially out of center.

Again, it’s not really been a problem for me or my particular TC with no damage and has been happening for 14 years. I do adjust/check the Fast Guns, but mine have never gotten that tight. Maybe yours tiedowns are also a lot tighter than mine. Or maybe our roads are that much worse in places or maybe we drive dramatically different speeds. My TC doesn’t always move.

For sure, it sounds like your rubber mat is a lot softer than mine if it noticably depreses. Also there are no slats on the bottom of my TC.

jimh425 wrote:

JimK-NY wrote:
If the camper is moving with a mat, I would look for the issue.

Are you saying your camper never moves even a little bit? I’m talking about occasional movement, not moving around every curve on a smooth/straight road.

Also, is your TC a tall 4500+ wet one.

I have a 9.5' Northstar Igloo. With modifications and loaded for travel, it weighs in over 4000#.

I am saying it does not move, at least not under any reasonable sort of driving conditions. I think it would take a camper busting bump that got the camper airborne.

The bed of the truck is not flat but has slats molded into the bed. In addition the bed is sprayed with a rough surfaced liner. The weight pushes down on the 1/2" thick rubber mat and it conforms to the surface. It is not going to slide or move even in the slightest. The base of the camper has 4 1x6 slats that run the entire length of the camper. Again the weight is going to make the mat conform to those shapes. In addition the bottom of the 1x6 slats also has some sections of anti-slip tread tape. I am sure that was gross overkill.

The camper should not shift or move at all. If that happens you will see it immediately. The fastguns on one side of the camper will be loose and the ones on the other side will be excessively tight. You want even and proper spring tension on all of the fastguns. Once I load the camper and drive for a while, I recheck the fastguns. I usually need to give each of them one turn to compensate for the weight compressing the mat. Again that compression assures there will be no movement.

If you do have shifting, I would find out why. Otherwise you will need to frequently adjust the tension and I suppose the camper could eventually shift substantially out of center.

Man, you Guys over think everything. Put the camper in the bed, tie it down and go.