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Driveline Hum with VIDEO!!

Discussion in 'Ford Trucks' started by cold_and_tired, Sep 14, 2011.

  1. cold_and_tired

    cold_and_tired PlowSite.com Addict
    Messages: 1,246

    Ever since I bought the truck (May 05 with 42,000 on it) it has had a very slight driveline hum. It has stayed about the same until a few weeks ago.

    The hum is so annoying and loud that the truck is almost undriveable.

    It's loudest between 58 & 62 mph although it starts around 30. It only hums when I am on the throttle either accelerating or maintaining speed. I have tried it with the transfer case in 4wd with no change.

    The u-joint closest to the rear differential was replaced about two years ago, the center bearing was replaced about a year ago and the rear end was rebuilt a few months ago. Other than that, the rest of the driveline still has factory parts. Replacing these parts has never caused the hum to go away completely.

    I'm not getting any weird vibrations or anything when the hum is occurring. The hum sounds like it's coming from directly beneath the cab.

    Here is the video I took of the sound: 2002 Ford F-350 SRW Powerstroke Driveline Hum - YouTube

    Let me know what you guys think. I really don't want to throw money at it blindly.

    Thanks
     
  2. grandview

    grandview PlowSite Fanatic
    Messages: 14,609

  3. cold_and_tired

    cold_and_tired PlowSite.com Addict
    Messages: 1,246

    **UPDATE**

    I took it by the shop that did the rear end rebuild to have them take a look at it. They did a test drive and put it on the lift. The shop owner said the coast side of the gears was worn extremely bad.

    The good news is that I am getting a new rear end, the bad news is that I am without my truck for the week.

    The shop owner said that this is only the second rear end to come back and that the shop has done over 400 of them. I believe him too. He has been in business for over 30 years. I'm just glad he's standing behind the work.
     
  4. grandview

    grandview PlowSite Fanatic
    Messages: 14,609

    good to hear ,you and Kim K both have a new rear end!
     
  5. cold_and_tired

    cold_and_tired PlowSite.com Addict
    Messages: 1,246

    I think hers is more worn out than mine and probably due for a rebuild.
     
  6. cold_and_tired

    cold_and_tired PlowSite.com Addict
    Messages: 1,246

    Just picked the truck up from the shop. The hum is gone! Let's hope it stays that way for another couple hundred thousand miles.