is there a crown in the 8 ft box on 16 gmc

[diver57]

Hi thought I read somewhere that there is a crown in an 8 ft box on the new chev;s and Gmc
Reason I am asking is because my new northern-lite seems to really bob up and down
when driving.
Anyone help me with this, whats the solution.
Thanks

[CAJW]

My 2013 LWB bed crown measured 3/16" with a 6' level, if that helps you.

[MORSNOW]

diver57 wrote:
any idea how much the crown would be .
I think i will try the cut away idea
thanks

Get a 4' level or longer and lay it on the floor of your box and you'll see how much of a crown there is. I was surprised at how much it was on my 6-1/2' box even though I couldn't see it just by looking at it. I didn't measure it but I'm sure it's a good 1/4".

[diver57]

any idea how much the crown would be .
I think i will try the cut away idea
thanks

[SoCalDesertRid1]

Bob B wrote:
Use the tractor supply horse mat and cut away the center and just leave around the perimeter.......That's what I just did to mine.

Now that right there, sounds like a great idea. 🙂

[Bob__B]

Use the tractor supply horse mat and cut away the center and just leave around the perimeter.......That's what I just did to mine.

[Vinsil]

Jim&Carolyn wrote:

geoboy wrote:

Is your truck a DRW?

No, but the camper is suppose to be made for a 3/4 ton short bed truck and I don't think you can even buy a DRW for a short bed truck.

Ram builds one.

DRW is not the issue.

[SoCalDesertRid1]

I think the only camper manufacturer that recommends use of the cabover struts is Lance. Other brands may not be constructed such that you want the cabover section to be part of the truck suspension...

[diver57]

what about the shocks the use see attached to the bottom of cab over and then to the hood do you think that would work

[GeoBoy]

Jim&Carolyn wrote:

geoboy wrote:

Is your truck a DRW?

No, but the camper is suppose to be made for a 3/4 ton short bed truck and I don't think you can even buy a DRW for a short bed truck.

The AF 811 is a heavy camper, maybe adding 19.5 tires and a sway bar may help your porpoising problem. Is the camper center of gravity at or in front of the rear axle?

[Jim_Carolyn]

geoboy wrote:

Is your truck a DRW?

No, but the camper is suppose to be made for a 3/4 ton short bed truck and I don't think you can even buy a DRW for a short bed truck.

[free_radical]

Wondering if it would be possible to put some kind of support,, 2x4 or such,
on the sides of the truck bed to have your TC sit,rest directly on this..

My camper sits just like that bolted to the sides of the box,not even touching the bed bottom and doesnt move at all..

[GeoBoy]

Jim&Carolyn wrote:
I've been over this issue of the crowned bed and the porpoising effect and fighting it for the past year.

I've got all that stuff on my truck, air bags, stableloads, new bilstein shocks, front timbrens, rubber pad, and pads to level the bed.

Maybe it's better, but I still have problems on rough roads - especially concrete. I've decided that the camper is just too heavy for the truck - and it's a 1 ton truck.

Is your truck a DRW?

[SoCalDesertRid1]

That is very strange.

Possibly if one were to put some 1/4-1/2" spacers under the front and rear bed mounts, and leave the middle bed mounts unspaced, this longitudinal bow could be taken out of the bed floor...

[diver57]

I already have a rubber mat in the box.