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Old 07-15-2013, 03:49 PM   #1
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Roo Porpoising

I bought a 2008 Roo 23SS from Camping World last month. Moved up from a popup to the hybrid which meant moving up to a WD hitch setup as well. Camping World setup the hitch and connected the truck for me.

After fixing a slight sway issue I noticed how much my 08 Titan was porpoising while driving on the interstate. It made me feel uncomfortable to say the least.

I read up on how to setup and verify the WD hitch so this past weekend I decided to check mine. Here's what I did, feedback welcome!

Leveled the Roo, 16 inches ground to frame, front and rear.
Measured the trailer coupler height - 20.5 inches.
Measured the height of the hitch ball - 24 inches.
Measured ground to upper part of wheel wells - 34.75 rear, 34.25 front.

Everything I read said the hitch ball should be within an inch of the 20.5 inch coupler height. So I lowered mine to 22. (closest I could get with current setup).

Reattached camper, set WD bars on 6th chain lug.
Bars are near level with ground.
Truck rear well height 34. Front 34.75.

Does that sound properly setup? I haven't had the change to drive it, wil do so tonight.
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Old 07-15-2013, 03:59 PM   #2
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I got sort of confused reading all the measurement you have posted there... Is the trailer sitting level when hooked with the w/d hitch and all the weight on the truck?
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Old 07-15-2013, 03:59 PM   #3
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What are you wheel well measurements on the truck without the trailer hooked up?
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Old 07-15-2013, 04:14 PM   #4
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What are you wheel well measurements on the truck without the trailer hooked up?
From the OP's post;
"Measured ground to upper part of wheel wells - 34.75 rear, 34.25 front"
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Old 07-15-2013, 04:19 PM   #5
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Originally Posted by avolnek View Post
I got sort of confused reading all the measurement you have posted there... Is the trailer sitting level when hooked with the w/d hitch and all the weight on the truck?
From what I can gather, the ball height of the truck unloaded was 22 inches, then the truck dropped .75 inch with the camper on, for a final height of 21.25 inches.
His Roo coupler height was 20.5 inches when the camper was level.
So it would seem that with the camper hooked up, it would be .75 inch high in the front.
Could he just have very weak shocks on the truck, or maybe he is running too low a pressure or has P-rated tires on his truck?
Curious.
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Old 07-15-2013, 04:24 PM   #6
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I don't believe tire pressure would create a lot of proposing... It can produce some but I don't feel it would be the issue. I would agree that the springs may be a bit on the weak side.

It's possible you need to let it squat a little more to allow it to sit on the over load springs or install air bags/timbren springs... I highly recommend air bags, as I have had them on a number of trucks and really help the ride of bumper pulls as well as help with stability of the rig...
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Old 07-15-2013, 04:34 PM   #7
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Trailer and truck apart....
Leveled the Roo, 16 inches ground to frame, front and rear.
Measured the trailer coupler height - 20.5 inches.
Measured the height of the (TV) hitch ball - 24 inches.
Measured ground to upper part of wheel wells on TV - 34.75 rear, 34.25 front.


TV and TT attached to each other:
(Attached camper, set WD bars on 6th chain lug.)
Bars are near level with ground.
Truck rear height now 34. Front 34.75.

Did not measure height of coupler and hitch ball when the TT is attached to the TV.

I hope that clears things up.
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Old 07-15-2013, 04:36 PM   #8
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Quote:
Originally Posted by avolnek View Post
I got sort of confused reading all the measurement you have posted there... Is the trailer sitting level when hooked with the w/d hitch and all the weight on the truck?
Looks it but I need to measure. Is the object to return the TT to the original height?
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Old 07-15-2013, 04:40 PM   #9
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Just installed new Bilsteins 2 months ago.

I'm not opposed to air bags, Santa can get them for me.

My biggest question is that Camping World had my hitch setup at 24 inches. I lowered it to 22 inches. Did I gain or loose anything? Does it make a bit of difference? I am under the impression it should have.


Quote:
Originally Posted by avolnek View Post
I don't believe tire pressure would create a lot of proposing... It can produce some but I don't feel it would be the issue. I would agree that the springs may be a bit on the weak side.

It's possible you need to let it squat a little more to allow it to sit on the over load springs or install air bags/timbren springs... I highly recommend air bags, as I have had them on a number of trucks and really help the ride of bumper pulls as well as help with stability of the rig...
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Old 07-15-2013, 04:41 PM   #10
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Quote:
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Looks it but I need to measure. Is the object to return the TT to the original height?

NO! It is supposed to evenly distribute the weight amongst the truck's axles as well as the campers axles! You do want the truck to squat some to accept the load. You are really looking for the leaf springs to engage the overloads to get your most stability. If it sags too much before engaging the over loads air bags another style of helper would be the way to go....

Sounds like you may be trying to get too much weight distribution... I'd back off a link or two and see how it sits... You shouldn't need much with your rig combo.
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