Coast Resorts Open Roads Forum: Class C Motorhomes: wandering front
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tpi

Southern CA.

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Posted: 06/03/14 10:34am Link  |  Quote  |  Print  |  Notify Moderator

Take the caster talk to heart. Also set your front tire pressure using the tire weight chart. Mine is far more skittish and likely to wander when the front tires are set at 65 PSI, vs. the correct weight setting of 45-50 PSI on my light class C. After being weighed I was surprised how low the front tires needed to be set.

I found the Roadmaster sway bars to be beneficial in firming up the handling. It feels more tightly connected to the road. I haven't changed the stock shocks but I suspect well chosen aftermarket shocks would also help tighten up the handling. In addition to the wander, I didn't like the general sloppiness of the handling dynamics.

* This post was edited 06/03/14 10:41am by tpi *





ron.dittmer

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Posted: 06/03/14 10:51am Link  |  Quote  |  Print  |  Notify Moderator

I didn't read through the replies, but will share that our 2007 E350 had the same wandering front end. We got a wheel alignment done while the rig was loaded up as if on a trip, including the fresh water and fuel tank being full, waste tanks empty, and all gear etc. inside. I even placed some exercise weights just behind the driver and passenger seats to simulate people sitting in the rig. With the load simulated as would be so on trips, the wheel alignment will be adjusted to the true in-use condition.

Adding heavy duty shocks, front & rear stabilizer bars, steering stabilizer, and rear trac bar, all helped to achieve a great handling rig. It went from a drunken sailor to a tight SUV feel. Getting it all done at once at a specialty truck suspension shop wasn't cheap, but oh so worth that $3900. Since 2007, we all here have learned of lower cost suppliers for the same upgrades, and Do-It-Yourself means to achieve the same goals at half the cost.


2007 Phoenix Cruiser model 2350, with 2006 Jeep Liberty in-tow


Hank85713

Tucson, Az

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Posted: 06/04/14 10:51pm Link  |  Quote  |  Print  |  Notify Moderator

Right now am in Killeen Tx. The winds really had an effect on the rig, any gust and it felt like I had a rear blowout or something! Yes we are towing a Hyundai Elantra about 2700 lbs, No I have not had the thing on scales. Was thinking of pulling into state roadside but all have been full. I read where they will weigh the rig but not sure what state it was in? Anyone know how true this is?

Will be heading est in a vcouple of days, have no idea of a place to go now that we are out on road, so guess will have to work iot oput till I get home.

Mich F

Plantation, Fl

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Posted: 06/05/14 06:29am Link  |  Quote  |  Print  |  Notify Moderator

I suggest you stop at a CAT Scale. Adjusting your tire pressure weights to what the load and inflation tables suggests (maybe 5psi above for a cushion) might make a big difference in the ride.


2014 Itasca Spirit 31K

j-d

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Posted: 06/05/14 08:12am Link  |  Quote  |  Print  |  Notify Moderator

What Mitch said! If you fuel a "travel center" (used to be called Truck Stop) it'll have a CAT scale. I went inside first, but apparently all it takes is to pull up to the front axle line and push the button on the bottom side of a little raised canopy that's near your driver side door. Go inside and pay what in my case was $10. They'll give you a weight slip with three numbers on it: Steer, Drive, Trailer. For us: Front Axle, Rear Axle, Total Toad.
If it IS tire pressures or load distribution that you can do something about, we would like to help you NOW, so your experience is better for the rest of this trip.
I think truckers might say the conditions you described in your last post were knocking them around some, too. Gusty enough and you'll feel it in a Corvette.
You say you're towing. I'm not asking what the equipment brands are. I'm assuming you have a Coach-Mounted Towbar and a commercially-made baseplate. Also that all the bolts are tight, hitch pins all in place etc etc. What I'd like to know is: Are you using a Drop (or Lift) adapter between Coach and Towbar? If you are, and the wobble from Coach Frame to Towbar is even half an inch, the Toad can start trying to knock the Coach off track from behind. I didn't dream up or even ask for that observation. I was talking to Eric Davis of EricsRV in Sequim WA, another of the RV handling issues expert and he offered it. There are motion limiters from both BlueOx (which I prefer in this case) and RoadMaster that clamp down on the drawbar to lock the twist out of it.


If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB

Hank85713

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Posted: 06/05/14 11:38am Link  |  Quote  |  Print  |  Notify Moderator

I have a falcon 6000lb all terrain tow bar, roadmaster hookups. All are secure. The towed goes straight, no observed wobble from it. No noticeable slop in any connections.

I will try to get into a 'travel center'/truck stop when I get going again.

Thanks to all who have responded.

j-d

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Posted: 06/05/14 12:05pm Link  |  Quote  |  Print  |  Notify Moderator

Looking forward to your weight numbers. Which 2012 Aspect Model do you have?

Hank85713

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Posted: 06/05/14 02:20pm Link  |  Quote  |  Print  |  Notify Moderator

its the 29 I think it is

j-d

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Posted: 06/05/14 05:55pm Link  |  Quote  |  Print  |  Notify Moderator

Aspect 28T which is 29'7" with 200" wheelbase...? That's a little over 55% of length in wheelbase, which should mean it isn't be too "front light." Brochure shows a "rear trunk." If there's room for big, heavy items back there by the bumper, that weight could be affecting distribution.

Hank85713

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Posted: 06/06/14 08:40am Link  |  Quote  |  Print  |  Notify Moderator

Jd I dont think so. Not carrying much back there. I noticed this same issue when we 1st bought the rig and it was empty.

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