Forum Discussion

Son_of_Norway's avatar
Son_of_Norway
Explorer
Mar 30, 2019

P30 Suspension Overhaul

Hello. The front end of my HR is sagging and I can't use my front levelers because they can't fully extend. So I am thinking of some kind of overhaul. I bought some new airbags to install. I also looked at some new coil springs. I find heavy-duty springs for sale that supposedly don't need airbags. But I wonder if they would make the ride too stiff. Maybe I would be better off with OEM-type springs so I could adjust the ride with the airbags. I don't really have any knowledge about this so I would appreciate any advice or experience. Thank you.
Class A
  • moisheh's avatar
    moisheh
    Explorer
    Mar 31, 2019
    The p30 chassis is a bad item.Weak suspension. Bad auto park brake. Parts are getting hard to find and can be pricey. I am a gm guy but not the p30.Do not install air bags. Get the aftermarket coils. It is not inusual to spend $5000 on the front end and handling add ond.

    Moisheh
  • fulltimin's avatar
    fulltimin
    Nomad
    Mar 31, 2019
    I can only speak from my experience. I have a 1983 Chevy P30 based Pace Arrow that is 27 feet long, and uses 16" tires.

    When I bought it, I did not know it had both front and rear air bags. Driving down the interstate, that thing was all over the road when a truck would pass us. Eventually I discovered the rear air bags.

    Putting about 70 lbs of air in them made a big difference, but it still was not great. Eventually I found that it also had front air bags.

    Putting about 40 lbs in them, along with the 70 lbs in the rear, and it was like driving a completely different motor home.

    When trucks passed us, no longer did I have to adjust the steering to keep the coach going straight down the road.

    The only add on equipment are the front and rear air bags, and also the shock type steering stabilizer. I am not sure how much the steering stabilizer helps, as it has been on for a long time, so I probably should replace it.

    Overall, I am happy with the way it handles, and that I can raise and lower the coach by just adjusting the air pressure.

    I haven't found parts to be overly expensive, as I shop around for parts instead of just buying the first one that I find.

    rockauto.com has been great for a lot of parts that I have bought for it.
  • Stim's avatar
    Stim
    Explorer
    Mar 31, 2019
    moisheh wrote:
    The p30 chassis is a bad item.Weak suspension. Bad auto park brake. Parts are getting hard to find and can be pricey. I am a gm guy but not the p30.Do not install air bags. Get the aftermarket coils. It is not inusual to spend $5000 on the front end and handling add ond.

    Moisheh

    WHAT a totally ridiculous statement!
    If you replaced EVERYTHING on the front suspension including the tires and rims it would cost no where near 5 grand!
    Not that you would ever need to!
    I had a 1989 Southwind 30'er and I replaced the worn out air bags and it rode and handled fantastic afterwards!
    With air bags you can adjust for weight in rear overhang. Try that with new springs- no options.
  • olfarmer's avatar
    olfarmer
    Explorer II
    Apr 01, 2019
    I put in the Super Steer front springs and so far, I think it rides better and drives better. I have not had it on a trip yet but just with a couple test drives it seems much better! I did have the front end aligned after I put the new springs in. Weigh the MH and front axle and order what they recommend. It also sets level now. It used to sag in the front even with the air bags at maximum pressure.
  • dougrainer's avatar
    dougrainer
    Nomad
    Apr 01, 2019
    Most People do not realize the front coil spring air bags on the CHEVY P-30 chassis are Chevy installed and are REQUIRED to be functional and aired up to get the front suspension to track and ride correctly. As to heavier aftermarket front Coil springs. That may be a replacement instead of using the Air bags. As someone who has ACTUALLY driven hundreds of P-30 chassis from 1979 to the early 90's, the Chevy factory set up is fantastic. The handling is just like a car. Do NOT confuse the P-30 with the suspension on the Workhorse chassis in handling. Doug
  • wvabeer's avatar
    wvabeer
    Explorer
    Apr 01, 2019
    Son of Norway wrote:
    Hello. The front end of my HR is sagging and I can't use my front levelers because they can't fully extend. So I am thinking of some kind of overhaul. I bought some new airbags to install. I also looked at some new coil springs. I find heavy-duty springs for sale that supposedly don't need airbags. But I wonder if .they would make the ride too stiff. Maybe I would be better off with OEM-type springs so I could adjust the ride with the airbags. I don't really have any knowledge about this so I would appreciate any advice or experience. Thank you.
    I replaced the air bags in my 92 p30 and aired them up, it drove much better. They are a bear to get in there but they will squeeze in. Do what you bought first you may be suprised
  • Gjac's avatar
    Gjac
    Explorer III
    Apr 01, 2019
    I think for 27ft MH's the bag replacement is fine. The OP's MH is much heavier The coil springs do wear out after many miles of driving and you will lose ride height that new bags will not compensate for. I replaced my front left bag(which is not hard to do) and with it fully inflated it would not return the ride height to spec. I eventually had to replace the coil springs with the super steer coils from Henderson. I had about 50k miles on it at the time. It rode much better and gave me the proper ride height. I now have over 120K and the ride height is still good. If have zero ride height now the bags will not give you another 2.5 ins of ride height. Just measure the distance between the bottom of the upper cross member and the lower A arm and you should have between 2 - 3 in gap depending on which P-30 chassis you have. Henderson will give you the exact spec height based on the weight of your front axle and the proper coil to match.
  • MartinH523's avatar
    MartinH523
    Explorer
    Mar 18, 2024

    Seems like everyone has the short RV's.

    I still have my 1988 Fleetwood Pace Arrow, 37ft.

    When looking for parts, I actually have to look up parts for a 1987 P30.   I blew an airbag on the front passenger side.  When it blew, I still had to get home .   At home I noticed that my motorhome was sagging a little at the passenger front.   I looked under the RV and saw that the coil spring was compressed a lot.    I then jacked it up and found that the rubber  jounce bumper between the "A"arms was also broke in half.  So I ordered the new Firestone Airbags for my 37ft Pace Arrow and I also found a new Jounce bumper for it.  So when I went under to replace the Jounce bumper, there was absolutely NO access hole or any kind of space to be able to remove or even see a nut or bolt mounting the stock Jounce bumper to the "A"arm.   So I have no idea how they would have even mounted it?   Would it be ok to drill a hole in the upper "A" arm just above the old mounting on the lower "A" arm?   I was also wondering if I should replace my coil springs?  And if I did, could I just put the airbags inside the coils before installing them?   I was told that I really don't need to replace the coil springs, because they are only sagging because of needing new airbags.   I did notice the excessive wear on the inside tread of the tires when this all happened.   Also, my hydraulic leveling Jack's stopped working when this all happened?

    Anyways, I'm just reaching out for feedback.   On another note, I am actually Disabled and use a wheelchair to get around, but I am doing this work myself!   That's one thing I am really good at, Working on the Ground!!  😂

About Motorhome Group

38,705 PostsLatest Activity: Jan 14, 2025