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how to raise left rear of AV8

Discussion in 'The Hokey Ass Message Board' started by BillyBobsSpeedShop, May 5, 2013.

  1. BillyBobsSpeedShop
    Joined: Jan 6, 2008
    Posts: 522

    BillyBobsSpeedShop
    Member

    I am having a clearance issue on my driver side rear tire and fender. I am running a 40 ford rear with a model A coupe rear spring and it is setup as spring behind. My tire is rubbing the lip of the fender and I am unsure how to raise just the driver side rear? I did put a 1 inch spacer to raise the back of the car up allready and it helps but not enough. I do have tube shocks in the back that i am running similiar to a 48 ford rear shock setup. When i put a level on the bottom side of my car it shows the car to be unlevel and shows the driver side to be lower than the passenger side. You can also see the isnt to level. I am running a new solid frame also. Its as if the driver side needs to be jacked up 1.5-2 inches. I am just unsure how todo so ?
     
  2. Rickybop
    Joined: May 23, 2008
    Posts: 7,305

    Rickybop
    Member
    from Michigan

    I'm not sure about the fix, but I'd suggest that you first determine where the problem is...front or back suspension...or a combination of both. If one corner is too high, it can cause the opposite corner to be too low.

    Put a jack under the exact center of the rear, and check level at front. Maybe using a piece of small tubing or a big bolt as the resting point. Put a jack under the center of the front, and check level at rear.

    I suspect that the the rear spring has uneven spring pressure left to right and needs to be rearched or replaced, or the mount was welded on unevenly. A spring mount that's out of level by only 1/8" can cause an inch or two difference at the end of the axle.

    Guys...can the spring be shimmed at the mount to compensate?
     
  3. Buzzard II
    Joined: Aug 27, 2009
    Posts: 354

    Buzzard II
    Member

    Do you have a body shop with a frame alignment machine nearby? 1.5-2 inches is a lot to be out! Was the floor replaced, and if so, is it in straight and plumb? Good luck! Bob
     
  4. Rickybop
    Joined: May 23, 2008
    Posts: 7,305

    Rickybop
    Member
    from Michigan

    And I'm wondering if some of the leaves can be reversed left/right to even out spring pressure.
     

  5. Has your rear spring eye bolt slipped from the center???center hole in crossmember?
     
  6. Rickybop
    Joined: May 23, 2008
    Posts: 7,305

    Rickybop
    Member
    from Michigan

    Ya gotta determine the cause. Could be a tweaked frame, body mounts, etc. Initially, I'd look under the car from the side and visually line up the bottom of both frame rails to check for parallel. But the problem may be at the ends of the frame...which would be harder to determine without some careful measuring. Do a bunch of measuring, and track down the cause...then you'll know what needs to be done.

    Good luck.
     
  7. BillyBobsSpeedShop
    Joined: Jan 6, 2008
    Posts: 522

    BillyBobsSpeedShop
    Member

    The frame is new and straight. The spring mounts are the original ones that are on the 40 ford banjo. I did put parts of a new floor in it and have shimmed the body. When ever i jack the body up and away from the rear the spring stretches out and when i lower the car back down i have the clearance around the tire but when i drive down the road the car settles back down to where it was. I did feel up on top of the rear crossmember and the spring is centered. Also i have my gas tank and battery in the trunk like the tardel coupe and my gas tank is on the driver.side and i am 270 6'5 so when i have a full tank and me driving there is no clearance.
     
  8. Dale Fairfax
    Joined: Jan 10, 2006
    Posts: 2,585

    Dale Fairfax
    Member Emeritus

    Try a wedge shaped shim between the spring and crossmember on the left side. Kinda sounds like YOU are the problem: 270#
     
  9. Loose sum weight !!!!!!!!!!!!! Problem solved
     
  10. swissmike
    Joined: Oct 22, 2003
    Posts: 1,297

    swissmike
    Member

    Make sure the two U bolts holding the spring to the crossmember are evenly tightened. Are any springs broken, maybe on one side? Trace the profile of the spring on a piece of cardboard, maybe it will show where the problem is.
     
  11. DICK SPADARO
    Joined: Jun 6, 2005
    Posts: 1,887

    DICK SPADARO
    Member Emeritus

    Before you go cutting, bending or breaking anything check the Ubolts, with you car on a level floor place jack stands at equal height under all corners of the car at equal points. Then loosen the Ubolts of the cross springs up so they are completely loose. Now level the car body front and rear. With the body level and the spring bolts indexed in the crossmember holes begin to tighten the Ubolts evenly 2 rounds at a time in a crisscross pattern first at the front and then the rear. Do not tighten one side of the Ubolt faster than the other side or this will rock the chassis on the spring and give your car a lean to the tighter side. After you have tightended the Ubolt place the car on the ground and check for level.
     
  12. gearheadbill
    Joined: Oct 11, 2002
    Posts: 1,313

    gearheadbill
    Member

    Great advice
     
  13. pasadenahotrod
    Joined: Feb 13, 2007
    Posts: 11,776

    pasadenahotrod
    Member
    from Texas

    Mr. Spadaro to the rescue once again with a simple procedure.
    You must always remember that ANY used springs (leaves or coils) will be "worn" more on the driver's side than the left because there is ALWAYS a driver in place while the wear is taking place on the road.
     
  14. chaddilac
    Joined: Mar 21, 2006
    Posts: 13,880

    chaddilac
    Member

    that worked on my T coupe... it was a little low on one side. Not now!!:)
     
  15. Vergil
    Joined: Dec 10, 2005
    Posts: 785

    Vergil
    Member

    If the above suggestions didn't solve it, flip the spring and see if the problem moves to the other side, if it did a new spring is next ... just went through this

    Vergil
     
  16. BillyBobsSpeedShop
    Joined: Jan 6, 2008
    Posts: 522

    BillyBobsSpeedShop
    Member

    I ended up purchasing a new spring and it seemed to help but after driving the spring settled and the fender is rubbing the tire again when driving and hitting bumps. I got to looking today and it looks like my left wheel and tire is sitting a little further out past the fender than the passenger fender? Is this normal?
     

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