Freightliner rear axle airbags higher than the front axle

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Shawn19, Apr 23, 2020.

  1. Shawn19

    Shawn19 Light Load Member

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    Apr 20, 2019
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    2007 freightliner Columbia my rear axle airbags are always higher than the front axle sometimes the rear are fully air up to the base wild the front axle airbags are normal i am just worry about popping one doesn't not matter if I am loaded or empty got a new leveling valve too got it in the shop a wild ago for a different issue they said leveling high an angle was where it should be i drove other freightliner Columbia before even ask my friend who has one seem like all 4 airbags should be the same high on level ground anyone ever had this issue or know how i fix it.
     
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  3. uncleal13

    uncleal13 Road Train Member

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    I've had the levelling valve go bad. It let air into the bags but would not let air out. So as I went down the highway the suspension got higher until the u-joints started to make a noise.
     
  4. AModelCat

    AModelCat Road Train Member

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    Your leveling valve airs up all 4 bags equally.

    Look at your frame. Unless those frame rails are 100% perfectly parallel to the road, the bags on the drive axles will never 100% match in height.
     
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  5. Shawn19

    Shawn19 Light Load Member

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    It a new leveling valve drive ok no noise so far
     
  6. Shawn19

    Shawn19 Light Load Member

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    Not looking for 100% match on all 4 but both rear are over 1 inche in different from the front i seem even Columbia to know something it not normal
     
  7. AModelCat

    AModelCat Road Train Member

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    4 possible answers:


    It came from the factory that way and you never noticed before.

    Ride height is too high.

    Front end is lowered (smaller diameter steer tires installed, sagged/broken front springs, wrong spacers under front springs, wrong replacement springs on the steer axle etc).

    Could possibly be a sagged pair of springs on a drive axle too.


    To start with, I'd be verifying the ride height at the steer axle is correct. I'd even park on a flat and level surface and measure the distance from bottom of frame to the ground at the front and rear of the truck. If frame is very close to level, I'd be looking at drive axle springs (assuming Airliner suspension). If frame is lower at the front of the truck, I'd be checking out the steer axle suspension.
     
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  8. Shawn19

    Shawn19 Light Load Member

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    Amodelcat that a good idea i check the high on the frame an see .
     
  9. spsauerland

    spsauerland Road Train Member

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    West Harrison, In
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    Is bottom of bag tilting? Air Liner is bad about having loose/stretched u-bolts.
     
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  10. Chubby Fly

    Chubby Fly Medium Load Member

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    Love that terrible noise
     
  11. Shawn19

    Shawn19 Light Load Member

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    I also have airbags on my steer axle too
     
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