Prostar bouncing/shaking when empty

[Waterloo]

(12-05-2020 )GhostHauling Wrote:  Thank you guys I appreciate the advice, I’m going to get new steers and shocks since it’s winter and my steers are at about 7 on the tread but I’ll give an update if that solves it, ride height is interesting I’ll have to check. What should the ride height be ? I pull a 48’ flatbed? Btw so I’ve been finding so many different answers for tire PSI and I’ve been running 110 cold in steers and 90psi cold in drives and trailer ( I religiously check all tire psi) my drives say max cold 120 my steers say the same some trailer tires say 120 others 105. I had a trailer tire at 60 PSI and aired it up to 105 psi and it blew out an hour later. So trying to find the magic number has been an interest but after airing up my steers to 115 cold and then Dead heading the shaking seemed to almost entirely go away.

If you air it up that high, and it rides better, I bet you have a tire issue, like a separated belt or the tire is out of round. I just went through this with my ProStar, the steering wheel was like a jackhammer over 63 mph, a new set of tires cured it.

I run my steer tires at 110, drives at 100. She now rides like a Cadillac with all new drives and now steer tires. I went with the Michelins up front, Dayton D610D Smart Way in the rear. Fuel mileage is getting better.