I just got some new RV tires for our Monaco Dynasty, Goodyear G670s I think they are, and had them aligned by Purcells's Tire Truck place in Phoenix. The alignment wasn't that bad when I went in, but when leaving, the rig was pulling sharply to the right. I called them and they suspected I had "radial pull" since the alignment was right on.They said to come back and they would switch the front tires and see if that wasn't better. It wasn't much. The rig still pulled to the right. I know some roads have a crown on them for drainage, but even long stretches of flat freeway, it would produce the movement to the right. They said come back in and we'll check the alignment, which I did. (80 mile drive from our home).They found the alignment was off and redid the entire job, still pulling to the right when I left. They were now talking of swapping the rear duals to the front and I gave up. I told them nothing seems to be working. Last time Spectrac did it, in Mesa, and did a super job. Is radial pull that big an issue or could their calibrations be off? Thanks for your thoughts!!

They didn't align rig correctly. Get spec for your chassis and find another shop. Send bill to Purcell's!

Radial pull can occur but it's not very common. If it was a radial pull it should have changed to the other direction when they swapped the two front tires side to side. You said you put new tires on. Did you notice the pull between the tire shop and the alignment shop?

Did they do a 4 wheel Thrust Angle alignment? I would bet the rear end is not sitting square in the chassis causing it to push to the left causing the coach to go to the right. Otherwise known as "dog tracking".

Could be the right front brake dragging.

I last had readial pull about 35 years ago. I don't think it's very common.

Front Tire alignment failure | Good Sam Community

Durb
Explorer
Apr 01, 2020
I bought my truck used; the previous owner had new tires installed and a front end alignment. The truck needed constant correction to keep from steering right. I took it in to Les Schwab and had it aligned again to factory specs, same problem, no change. Took it back, the alignment specialist knew what he was doing and made some corrections on his own. Truck tracks straight as an arrow and has done so for seven years. Tire wear is normal. He told me what he did but I can't remember the details.

My guess there is an alignment specialist somewhere that can make your rig right.
CapriRacer
Explorer II
Apr 01, 2020
Except they swapped tires left to right. That should have reversed the direction of the pull if it was tires. The pull didn't change, so the problem lies somewhere else.

I'm going for draggy brake.
allbrandauto
Explorer
Apr 01, 2020
so the real question is was it pulling before tires were put on.If it wasn't then the tires are the problem. in my shop I have put new tires on and have seen the same problem. had to put tires in a different position to make car happy
wolfe10
Explorer
Apr 01, 2020
On the Monaco 8 outboard air bag suspension, you have a solid front axle.

So, no CAMBER adjustment (short of bending the axle).

Caster is set by solid shims and is unlikely to change.

So a front end alignment is basically checking RIDE HEIGHT and TOE as well as verifying no worn parts. Lots of bushings that locate the "H" frame in that suspension.
hypoxia
Explorer
Apr 01, 2020
Executive wrote:
Spectrac is the best in the country. I have mine checked each year we return to Mesa. It's worth the drive to have them check it out. I bought my tires from Redburn.....Dennis

I used to say that about Spectrac until I brought it to them in September for a thrust alignment & they didn't see the broken welds. We fixed that in my shop last week.

I cured my "Radial Pull" this week. It pulled left so I swapped the steers then it pulled right. Swapped them again & it pulled left. Took it to Redburn & had them break down two drive tires and put them on the steers. Problem solved.
Executive45
Explorer III
Apr 01, 2020
Spectrac is the best in the country. I have mine checked each year we return to Mesa. It's worth the drive to have them check it out. I bought my tires from Redburn.....Dennis
doxiemom11
Explorer II
Apr 01, 2020
Is there a steering stabalizer on the front? Is that aligned right? We had a stabalizer installed and it pulled badly to the right, took 3 times for the shop to get it adjust correctly so it didn't pull.
ScottG
Nomad
Apr 01, 2020
I last had readial pull about 35 years ago. I don't think it's very common.
ArchHoagland
Explorer
Apr 01, 2020
Could be the right front brake dragging.
lryrob9301
Explorer
Apr 01, 2020
Did they do a 4 wheel Thrust Angle alignment? I would bet the rear end is not sitting square in the chassis causing it to push to the left causing the coach to go to the right. Otherwise known as "dog tracking".