Register to remove these ads

Thumping from rear end

Discussion in '2nd Gen - 2003 - 2006' started by Camd94234, Sep 16, 2013.

  1. Camd94234

    Camd94234 New Member

    Posts:
    3
    Likes Received:
    0
    Joined:
    Sep 16, 2013
    Location:
    Mass
    I recently got my parents 03 expedition and it has a thumping noise from the rear going about 20-30mph and i thought it was tires so i put new tires on it and didnt fix it... My boss who has been working on cars for 30 years and has an ase. And we put it on the lift and he thought it was the rotors because were warped. I turned then and it is still there. Btw we herd nothing that was put of the normal like bearings struts or anything. The car used to sit for months at a time.. Has anybody had this issue? Should i worry about it?
     
  2. ExpeditionAndy

    ExpeditionAndy Supporting Member Supporting Member

    Posts:
    528
    Likes Received:
    67
    Joined:
    Aug 31, 2013
    Location:
    Indiana
    What are the exact conditions to reproduce the problem? What gear are you in, D,1,2,3? Is it in 2WD AWD, 4WDH, 4WDL. Does your truck have RCS etc.
     
  3. Camd94234

    Camd94234 New Member

    Posts:
    3
    Likes Received:
    0
    Joined:
    Sep 16, 2013
    Location:
    Mass
    Doesnt matter what your in awd 2h, i put the car in N shut it off and i could still hear it. I have not tried it in 4wd. What is rcs? And it is just a constant thump thump thump thump around 20-30 mph.
     
  4. toms89

    toms89 technical advisor

    Posts:
    5,171
    Likes Received:
    416
    Joined:
    Mar 13, 2011
    Location:
    MD
    Maybe U-joint bearing seized?! Could be hard to see with visual inspection.

    The best way to tell would be remove driveshaft from the pinion flange and check for freedom of movement both directions. Mark flange and driveshaft so it can be reinstalled in the same position prior to removing.

    I have heard the rear u-joint fails far more often than tranny side u-joint.

    Other than that it leaves damaged ring gear or bad bearings?!

    If it is a U-joint eventually it can fail and the driveshaft is free to exit the vehicle. Not a good thing!!
     
    Last edited: Sep 16, 2013
  5. Camd94234

    Camd94234 New Member

    Posts:
    3
    Likes Received:
    0
    Joined:
    Sep 16, 2013
    Location:
    Mass
    U joints move freely. I pressed on the ebrake today just to see and it shut it up i think i have some rust build up on it or i need to ebrake pads
     

Share This Page