Question about 1985 Ford F 250

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85 f250 2wd, 6.9D, 4spd, Dana 60 rear

1985 F-250 Noise coming from rear. Sounds like taking two metal spoons and smacking together as fast as you can, and something new came up today, and only in 3rd gear. The rear end vibrates, only in 3rd. Really weird, hope I don't have to put a rear end in it.

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  • Alan Conner
    Alan Conner May 24, 2009

    Ok, I didnt open my rear up, but I did top off the fluid for now, it only took about 3 or 4 oz. The driveshaft has some play in it, if I grab it, I can spin it about an inch and a half both ways. I am going to change the U joints, and maybe get a carrier bearing and see what that improves, if nothing, its gotta be the rear or the tranny. Any more ideas before I dissect?

  • its420_us May 11, 2010

    Have you checked the oil in your rear end?



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You need to inspect the rear end. Put the cover off, drain the fluid, and inspect teeth and bearings. Also identify the state of the fluid (was it good). Also inspect the u-joints and hanger. I would also look at the level and condition of the trany fluid. You may have a problem with 3rd gear but IM not sure yet. Look at the rear wheels too. The vibration may be related to the wheels, lug nuts, or the weights on the wheel/s. Get me as much info as you can. The more you retreive the closer you'll get to the bottom of it.

Posted on May 24, 2009

  • larry blais
    larry blais May 25, 2009

    The rear end has too much play, it will need to be serviced. You can do the rear end first then inspect the trany but you should look at a sample of the trany fluid. If the fluid is clear of chunks of metal, that is a good sign.


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I would get under the truck and grab hold of the drive shaft and turn it side to side, and check the universal joints. Also I would remove the dif. cover and check the gears, will be obvious if there on any problems with that. Plus you can put new gear oil in there, all you need is some red RTV to reseal the dif. cover back up when your done.

If the dif. is bad you can get the internals at any parts store for under our around $100

Posted on May 24, 2009

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Look on the back of the wheels by going under the vehicle. and tell me if you see a light oil. I am sure yours is a sealed pumkin. If not the oil in the pumkin may have leaked out

Posted on May 24, 2009

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