brown774 Report post Posted March 12, 2018 We have 07 Monaco Diplomat that seems to wonder side to side while at highway speeds. Minor corrections are needed to stay centered. Original shocks, wondering if new ones would help, with this problem? New tires with correct pressure, so that is not a problem. No excessive up and down or rebounding. Share this post Link to post Share on other sites
wildebill308 Report post Posted March 13, 2018 3 hours ago, brown774 said: We have 07 Monaco Diplomat that seems to wonder side to side while at highway speeds. Minor corrections are needed to stay centered. Original shocks, wondering if new ones would help, with this problem? New tires with correct pressure, so that is not a problem. No excessive up and down or rebounding. Have you ever had a all wheel alignment done on the coach when it is loaded for travel? Bill Share this post Link to post Share on other sites
manholt Report post Posted March 13, 2018 Quote Coach wander Check alignment, toe in and caster. Share this post Link to post Share on other sites
wayne77590 Report post Posted March 13, 2018 As an '07 you have some bumpy road miles and things can loosen up. I would take it to a chassis specialist for your chassis and have it checked out. In my previous 2008 MH with a Freightliner chassis and when I had it in for an annual inspection I mentioned the slight wander. When I picked it up the technician said he tightened all the front end bolts. What a difference it made. Eventually I had a Safe-T-Plus installed. Share this post Link to post Share on other sites
manholt Report post Posted March 13, 2018 Wayne. 07 Roadmaster chassis, end off the line for the original in 06! Share this post Link to post Share on other sites
wayne77590 Report post Posted March 13, 2018 Having the front end checked still applies. Roadmaster is a customized Freightliner Motorhome Chassis Share this post Link to post Share on other sites
Padilliac Report post Posted April 24, 2018 I have a 2006 Monaco Diplomat PAQ that I've put 25,000 miles on since I purchased it 4 years ago. Our first trip from California to Iowa involved a lot of white knuckle driving across the windy plains of the mid west. Keeping this coach in its lane, particularly on small country roads, was exhausting to say the least. Trucks passing from the opposite direction were the worst. At the time my coach had new tires but original shocks. I had no free play in the steering. The coach was, for me, undrivable. Each day ended with a cold 6 pack just to settle down. So....... after MUCH reading and pondering the expense I purchased a "ride enhancement kit" from Source Engineering in Eugene, Oregon. It includes sway bars, new shocks and a steering stabilizer. I paid $3470.00 in 2015. A huge investment for me on something that wasn't guaranteed to work. I installed it myself. (Not recommended for the faint of heart). The change in drivability is amazing. These are big boxes and the winds are easily felt in them, but the sway bars really make a difference when its windy. After driving 15,000 miles now I am both relieved and glad I spent the money for this product. Testimonials are always tough, but when I read your post I had to chime in. Source Engineering is easy to contact and perhaps could offer another opinion. It won't be a sales pitch. Like the others though, you should probably start with an alignment. Or you may just have a sloppy steering box. Either way, a wandering coach is a real drag. Good luck to you. Charles Share this post Link to post Share on other sites
duanelin Report post Posted April 25, 2018 If your steering box is tight you should research a Watts Link for the front. Shocks or a alignment will not fix the wandering. There is a lot to see on IRV2. Also on the Monacoers site on Yahoo. I had the same problem with a 2012 Diplomat 43DFT. It goes straight down the road with no wandering. Duane Share this post Link to post Share on other sites
wolfe10 Report post Posted April 25, 2018 Actually, insufficient CASTER will cause a vehicle to track "less well". Setting caster to the higher end of spec will help with straight line tracking and also wheel return to center after a turn. Share this post Link to post Share on other sites
jleamont Report post Posted April 25, 2018 1 hour ago, wolfe10 said: insufficient CASTER will cause a vehicle to track "less well Totally agree! There seems to be a lot of aftermarket stuff hung to correct alignment/tire pressure issues that really need to be looked at first. I have the older chassis before the RR8, basically the same below the floor level. I have none of the complaints operating this coach like I keep reading about. I would assume if anyone would have issues it would be me at 41'2" with no tag. I can only conclude its an alignment, tire pressure issue or worn out component creating the complaints. Have all of that addressed first, then look for aftermarket components to dial it in to your liking's if still not satisfied. Share this post Link to post Share on other sites
dkreuzen Report post Posted April 25, 2018 The wandering you describe is an all too common issue with the original Monaco Roadmaster chassis. If you have a Shepard steering box it should be replaced with a TRW adjustable box, then the addition of a watts link on the front axle and cross bars on the rear. All of these modifications and success stories are on iRV2's Monaco forum. I did it and am very happy with the results. None of the add on steering stabilizers will repair the problem. Share this post Link to post Share on other sites
rayin Report post Posted April 30, 2018 Here's some interesting reading on the subject of MH handling problems and solutions. Several subjects addressed here are in that article. Share this post Link to post Share on other sites
