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U-Joint Life?

Discussion in 'Transmissions & Transfer Cases' started by Stic-o, May 21, 2007.

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  1. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    How long should the average u-joint last? I have a clunk in my drivetrain, and It really feels like a u-joint, but I know they have less then 10k on them. They were new when I had a new rear driveshaft made after the SAS. Not sure what else it could be...replased so much, that I'm not sure where to start. The only thing that has a lot of ware, would be the t-case.

    :confused: Any ideas anyone?
     
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  3. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    No one knows?:confused:
     
  4. ExplorerDMB

    ExplorerDMB Moderator/Technician Moderator Emeritus

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    I've seen u-joints last 150K plus....but I've seen some destroy in couple thousand miles. It is all depending on how much angle and torture they go through. 10K is def young. Are you greasing the joints up after you install them? they come pre-lubed, but def not enough! Spicers are great to use.

    -Drew
     
  5. BrooklynBay

    BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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  6. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    I'm pretty sure they are Spicers. They were already installed on the driveshaft when I bought the shaft.

    I guess I could remove the rear shaft and try driving in 4wd, with only the front axle working. That would tell me a little more, if it's in front or behind the t-case:rolleyes:
     
  7. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    So now I am wondering if it is the U-joint. It acually feel like the pinion is rocking up and down. When ever I apply torque. On the way to work I go up and over a hill in traffic, and every time I stop you can feel it reset it self.:mad:
     
  8. 410Fortune

    410Fortune MUD SEASON 2.0 Staff Member Moderator

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    check the pinion bearing/yoke on your 8.8
    When they go they GO so it may feel loose just by getting under there and grabbing it
     
  9. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    I hope that's not what it is..It only has about 10k on it..:( and It's going to be a real pita to tare the whole axle apart this time:mad:
     
  10. 410Fortune

    410Fortune MUD SEASON 2.0 Staff Member Moderator

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    the pinion seal and bearing can be replaced without taking the 8.8 apart I BELIEVE

    could it be your slip yoke?
     
  11. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    You sure about that? I know the crush sleve can be replased with out removining the pinion, but I don't think the seal can, but I could be wrong:rolleyes:

    slip yoke on the driveshaft it self? :scratch: Hmmm I know it has a zerk fitting for greeasing, but again, only 10k on it.
     
  12. 410Fortune

    410Fortune MUD SEASON 2.0 Staff Member Moderator

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    get under the truck and do a shake down test thats the best place to start
     
  13. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    Well I tried shaking the driveshft before, and that sucker didn't even budge. I was also thinking of getting Stic-cam down there to investigate.:D
     
  14. 410Fortune

    410Fortune MUD SEASON 2.0 Staff Member Moderator

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    hell yeah thats a great idea
     
  15. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    Actually, it just popped in my head what it could be. (insert smilely with lightbulb here)

    I replased the Trans mount not to long ago, and I wonder if it's not tight all the way. That would for sure do this! :eek:
     
  16. DeRocha

    DeRocha NEX Vice President Elite Explorer Moderator Emeritus

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    Sorry just saw your thread... I would look into lubricating the drive shaft slip joint...
     
  17. Rick

    Rick Pumpkin Pilot Staff Member Admin Elite Explorer

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    Also check the nut on the transfercase flange. I've seen that come loose before.
     
  18. cgriffin_5139

    cgriffin_5139 B

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    Oh what about the motor mount Stic did ya get that changed?
     
  19. 410Fortune

    410Fortune MUD SEASON 2.0 Staff Member Moderator

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    I have had issues with the Ford trans mounts before, I LOVE a steel bolt into threaded aluminum = SUCKS

    Plus the nice sandwhich with the exhaust hanger is always good

    Dont get me started on the glue a piece of rubber to a piece of metal = sturdy mount idea either....
     
  20. Stic-o

    Stic-o Elite Movie Star Elite Explorer

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    Yeah I took the hanger out. It didn't fit with the last trans mount I bought for some reason:confused: I think I'm on my 3rd trans mount.

    as for the motor mounts...nope still have not replased them, I've had them for about 2 years though.:D
     
  21. cgriffin_5139

    cgriffin_5139 B

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    Ok could the bad motor mount have broken the Trans mount, form the excess movement?
     

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