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help solve axle and other problems for inexperienced mechanic!

Discussion in 'The Garage' started by 86sierra, May 19, 2005.

  1. 86sierra

    86sierra Registered Member

    Oct 31, 2003
    Likes Received:
    I have an 86 Sierra, 4" spring lift, 35" bfg at's and about 170,000 on the truck with stock 10 bolt axles.
    I was driving the truck at least once every week or two, but let it set for 4 weeks, and have had problems since.
    Driving to my fiancee's, truck began stuttering badly, parked it, her dad helped fix and found a rocker arm broken in half at the bolt.

    Here are the problem's now-
    1. oil or grease covering entire driver's side rear axle tube
    2. truck seems to slow rapidly when coasting, like a brake dragging or rear axle binding
    3. severe shimmy/hopping when slowing down to about 35 mph
    4. loud "clunk" when shifting into drive/reverse (has done this for about a year though)

    Sorry if the explanations are vague, but I think there is something wrong with the rear axle and am looking for the cheapest solution right now.
  2. Burt4x4

    Burt4x4 3/4 ton status

    Feb 17, 2000
    Likes Received:
    California (Modesto area)
    Well the 35" tire on 10bolt axels is pushing the limits. So until you start taring into the housing and inspecting its tuff to say. I would remove the diff cover and look for metal pieces. I would try to move the drive shaft at the ujoint if it moved at all upndown side ot side then it's toast...
  3. dyeager535

    dyeager535 1 ton status Premium Member

    Dec 13, 2000
    Likes Received:
    Roy WA
    Check to see that the oil isn't coming out of the axle tube end nearest the wheel.

    Could be related to the rapid slowing if the brake pads are contaminated with the gear oil.

    Only 4 places for a rear axle to leak, (unless it's cracked) tube end, joint of tube to center section, yoke, or diff cover.

    Is it gear oil or engine/tranny oil/fluid?
  4. garlicbreath

    garlicbreath 1/2 ton status

    May 17, 2003
    Likes Received:
    Don't worry about the clunk when you put it in drive, every chevy I have ever owned did this, even with all new U-joints. As for the fluid leak, my suggestion is to pull the wheels and brakes and give everything a good hose down with brake cleaner, drive around a little while and pull everything again. Most of the time you will see where it's leaking. As for the truck "dragging" when you let off, I would jack it up, put jackstands under the rear end, disconnect the driveshaft and see if the wheels are hard to spin. It's prolly a bad axle bearing. Do some investigating on your own, then post back, alot of guys here know what they are talking about and like to help out the newbs.

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