Forum Discussion

goufgators's avatar
goufgators
Explorer
Nov 08, 2015

Please don't give up on me...still need help!

I've posted before regarding steering (wandering) problems on my '04 class A, Ford chassis. I've received good advice and have begun to take action on some of the comments. But, the problem continues! I'll try to summarize below what I've done and ask questions about future action to take:

1. The front end has been aligned by a reputable local dealer. No improvement.
2. Steer Safe add-on installed. No improvement other than more secure feeling in case of blow out.
3. New shocks installed...(this could be a problem)! Added new Monroe shocks...now believe should have changed to Bilsteins...your thoughts?
4. Important point (I think), I had new Goodyear 245/70R/19.5 (H) tires installed a little less than a year ago. Previously, the MH had that size tire but "F" tires. The steering problem became considerably worse with these new "H" tires. Could that different type tire make that much difference in handling?
5. Another important point: The coach was weighed (front and rear). Don't have access to four corner weighing. Based on the weights, the Goodyear chart suggests 80 psi. At that psi, the coach steers beautifully. No wandering! But, as you know, psi increases as you drive due to the tires heating up. When the psi reached about 90 (and it often gets close to 100)...I have a TPM system... then the wandering takes over and with it...white knuckle driving. If I could keep the psi at about 80 I'd not have a problem...but, alas, that's not going to be possible.

There are other 'add-ons' available on the market but need your thoughts about: 1. Davis Tru-trac; 2. Safe-t-plus; rear stabilizer bar. Should I have either or all ? of the above installed?

I don't mind the cost to continue add-ons if it will resolve the problem. Regardless, I've got to have relief or the MH that we otherwise like very much will have to go! I cannot continue the white knuckle, totally unsafe driving conditions.

Many thanks for your continued advice and counsel!

Larry
  • What F53 chassis do you have. My 20.5K F53 also came with the 245x70 r19.5 "F" tires and they were perfectly adequate for the gvwr. I would consider going with "G" tires but never "H" as I believe they would be way too stiff for your chassis. Also you might consider going with a different tire brand as Goodyear has developed a bad reputation with some here on the forum.
  • Gjac's avatar
    Gjac
    Explorer III
    I believe each tire should carry the same weight. For example if your MH weights 18,000 lbs each tire should carry 3000 lbs of that weight. It is easy to suggest a bunch of addons which may help some, but I would weigh it first and see how close you are to equal weight on each tire. Also what is your wheel base compared to your length? You have already spent a lot of money on improvements, checking weights is free. It's possible that your sway bar bushings are worn out or some thing else but I would think that your alignment shop would have found those things. If you post the weights,front end readouts,castor etc, someone familiar with the Ford chassis will help.
  • Most coaches usually do travel better if the front end is loaded close to max axle weight.
    The thrust angle alignment means that the rear end is in proper alignment with the front end, rather than trying to push the coach to the right or left.
    As mentioned, on some coaches they ride better if adjusted to certain RV specs rather than just the basic F-53 Ford specs.
    I have to assume that the tires that you installed are "steer" designed tires or "all position" and not tires that are considered load tires to be used on the rear or on a trailer.
  • John&Joey wrote:
    I had the prior generation of the F53 then yours. The problem was not alignment, but caster. Increasing the caster solved the wandering, but will wear out your tires faster. On the other hand, on most MH's the tires normally rot out before they wear out.

    You may want to ask the alignment shop (and do some research) on the appropriate caster for good steering on your generation of the F53.


    Thanks! I will check on this...
  • DutchmenSport wrote:
    It's just a thought? When you are on the road are your holding tanks (Fresh water, black / gray tanks) full? It's possible the sloshing of the water "could" be causing some of the problem? Just sayin'?? If your traveling with empty tanks, then disregard this idea.


    We do travel 'empty'.
  • rgatijnet1 wrote:
    Was the alignment done with the coach loaded?
    Was the alignment a four wheel thrust angle alignment?
    How close to max front axle weight is your coach?


    Coach was not loaded but, when we travel, we travel relatively light.

    I don't know regarding your second item.

    On the 3rd comment: I don't know but can find out and report back later.

    Thanks!
  • I had the prior generation of the F53 then yours. The problem was not alignment, but caster. Increasing the caster solved the wandering, but will wear out your tires faster. On the other hand, on most MH's the tires normally rot out before they wear out.

    You may want to ask the alignment shop (and do some research) on the appropriate caster for good steering on your generation of the F53.
  • It's just a thought? When you are on the road are your holding tanks (Fresh water, black / gray tanks) full? It's possible the sloshing of the water "could" be causing some of the problem? Just sayin'?? If your traveling with empty tanks, then disregard this idea.
  • Was the alignment done with the coach loaded?
    Was the alignment a four wheel thrust angle alignment?
    How close to max front axle weight is your coach?