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99 F250 Sd

Discussion in 'Ford Trucks' started by SteveR, May 10, 2007.

  1. SteveR

    SteveR Senior Member
    Messages: 252

    I am having trouble keeping the seals in the back side of the hub assy. When they go once a year the axle bounces up and down. This only happens on the drivers side. Any help figuring this one out would be appreciated.
  2. f250man

    f250man PlowSite Veteran
    Messages: 3,124

    I don't know what causes it but mine have just started to make noises to. Drivers side only. Steve
  3. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    You mean the grease seal?
    The U -joint may be worn and starting to bind chewing up the seal. Hitting a bump unbinds it and the energy released makes the shaft move too much in the seal opening.If you have the Dana 44 they go through u-joints about every 30k when you use the truck to plow. The drivers side is the easy one to change ( u joint ),the shaft should slide right out of the pumpkin once all the stuffs taken off the spindle.
    The right side you have to pull the center section ( pumpkin ) out most times to change the inner u joint. It's a 2 man job to get it out and in.
  4. snowman2025

    snowman2025 Senior Member
    Messages: 152

    also, while you have the shaft out make sure it isn't bent. i had an old dodge that went through seals like they were going otu of style and finally one day when i yanked the shaft out and it rolled across the floor i noticed it was slightly bent.
  5. SteveR

    SteveR Senior Member
    Messages: 252


    No bends or bad u joint. I replaced both the outer seals (again) and going to give it a try.
  6. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    That truck has not been in an accident has it? Where the left part of the axle / frame could have been bent? Or the pivot point is binding? Not chewing up tires? You have both the axle c clip and the hub retainer bale in-place? No clicking when in 4x4 while turning?
    No vibration when in 4x4 at a higher speed?
  7. Ggg6

    Ggg6 Senior Member
    from IL
    Messages: 521

    Since his truck is a 99 SD he does not have a D44, or TTB. His truck has a D50 straight axle. There is a serviceable needle bearing inside the hub bearing assy. This needle bearing supports the outer axle shaft. It does need periodic grease.
  8. jtink2

    jtink2 Junior Member
    Messages: 1

    I had the same problem. on the back side of the hub bearing assembly thear is a needle bearing when it gose out it lets the axle to move and couse the seal to go out. www.ebatmus.com part # b-2110 $6.00.
  9. nevrnf

    nevrnf Senior Member
    Messages: 456

    I just replaced them in my 99 this last week while doing ball joints.