Poor ride on the E450 platform

[dcooper67]

Is there anything that will help the harsh, jarring ride from the rear of my Phoenix Cruiser on a E450 chassis?

[AndyW]

There are charts, but you'll need to provide front/rear axle weights and then the make/model of your tires first.

[dcooper67]

Thanks for all of the comments, I've come to the conclusion that my tires are over inflated. I carry very little stuff, 250 lbs max, plus my wife and I, not towing and have front - 65 and rear - 80. The coach only has 20k miles on it so I think the springs should be ok, probably could use some new shocks.
What should the tire pressures be with this load?
The coach is 26 ft.
Thanks again!

[tpi]

Oldme wrote:
Have you adjusted the tire pressure to the weight you actually carry?
That most likely will be different than your door sticker.

+1

I wouldn't say the E450 rides like a cloud, but it isn't that bad on normal roads. If it is bad the road is usually pretty beat up-well worse than average. I have a light class C on E450.

Have it weighed (front and rear) and set tire pressure based on weight. Don't blindly set it at 75 PSI, especially front.

[Gooding__R]

My Coachman came from the factory with airbags to take the shock off of the spring suspension. But mine is a diesel so there may be a difference.

[pauldub]

How much load do you have on the rear axle?

[rockhillmanor]

Is your RV new or used?

If you are getting a jaring from the back when you go over a harsh road it's the leaf springs shot. Mine was banging over bumps too.

Leaf springs are metal and metal fatigues. A good frame shop cab measure them for you no charge. To show you.

I replaced my leaf springs and 'added' a leaf. BIG BIG difference.

So many people add air bags etc etc. when it's the leaf springs that need to be replaced. Air bags is just a patch and actually make the ride harder because there is no give in compressed air.

Also lower tire pressure in the front. Keep back at manufacture specs.

After I replaced the leaf springs plus one the whole coach rides like a limo. Wouldn't trade it for anything.

[Oldme]

Have you adjusted the tire pressure to the weight you actually carry?
That most likely will be different than your door sticker.

[mlts22]

Airbags?

[Gooding__R]

My E-450 Coachmen has air bag support on the rear end. This may solve your hard harsh hitting ride. Before a trip we put around 25 lbs of air into the bags and have a soft ride. Hope this helps.