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Pulling Hard Left in 4x4

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by Robert Gaba, Feb 18, 2013.

  1. Robert Gaba

    Robert Gaba New Member

    Hey guys, Im really hoping to find some help here as I am at a complete loss. I've got an 05 Z71 Sierra that humms quites loudly and pulls hard to the left the second that 4 wheel drive engages and then any and all hints to the problem disappear the second it's returned to 2wd. I've replaced both hubs, rotors, and pads(Before problem) and then today I replaced both CV's(Problem related) which had no affect on the condition.
    Thank you for your time,
    -Rob

    EDIT: Someone told me it could be the transfer case chain, but that makes no sense in my logic.
    Last edited: Feb 18, 2013
  2. MrShorty

    MrShorty Moderator Staff Member 1000 Posts

    I have sometimes seen this kind of behavior when there is excess "tension" in the drivetrain. Are all 4 tires matched, or are the fronts a different make/model from the rear? Even tires that are the same size can have enough size difference from manufacturer to manufacturer to create tension that can show up as a pulling to one side.
  3. Robert Gaba

    Robert Gaba New Member


    You know what? The Spare is actually on the right front, same brand and model (Bridgestone Duelers but the others are Revos, the spare wasn't) but I do believe the load range and speed rating was different on the spare. Ill try swaping them around to see if the problem transfers to the other side tomorrow morning.
    Thank you!
    -Rob
  4. Pikey

    Pikey Moderator Staff Member ROTM Winner 1000 Posts

    According to my ring and pinion guy, The bearing on the drivers side of the front diff are known to go bad at about 100,000 miles. He said that this is the most common repair he sees. Take it by a gear shop, they should check it out for free. Most the time transfercase chains just become noisy, a Bad one will not cause pulling..ever...
  5. j cat

    j cat Active Member 1000 Posts

    with the operation of 4wd all tires must be the same size and wear. when this is NOT then the drive train will fail .

    with a spare unworn tire on the passenger side and worn tire on the driver side it would do a pull to the left.
  6. Morpheus

    Morpheus New Member

    I have this same issue with my 2000 GMC Sierra Z-71. I have replaced the front differential, both CV axles, the driver side wheel hub, and all of my tires are the same size. Wheels are not bent, breaks are relatively new etc. I haven't found any real answers searching the web for almost 6 months. It will pull to the left in 4wd, even in snow or mud, and then as soon as you take it back to 2wd it pulls straight instantly. Any answers on this issue?
  7. j cat

    j cat Active Member 1000 Posts

    swap the front tires left to right right to left.
  8. Morpheus

    Morpheus New Member

    I rotate my tires regularly. I rotated them this past Friday actually. I just got out in some deep snow and had it in 4wd longer than I ever have just driving around and pulling people out of drifts. When I would get to pavement I took it out of 4wd since you don't want to run it on pavement and my left front side started howling loudly. It never has done that before so I may dig into the hub again and see if it's just a bad hub I purchased. I was going to see if anyone had any other ideas though like the inner CV joint or if it's possible that the rack on it could be bad and not keeping the wheels straight when they are pulling forward. I just don't want to waste a bunch of money on crap on cv shafts etc. I like cutting to the chase. :great:
  9. j cat

    j cat Active Member 1000 Posts

    I have alot of experience with these hubs. the hub seal rusts out . now the bearings are exposed. remove the wheel sensor and the grease should be blue. if the grease its brown is gone. what I did to it to by some time , was to pump grease into the sensor hole . until it starts to back up or fall out the back seal side. this should give you some time to get new and replace. my hub was bad but not with noise I ran it for a month and it did not get worse.

    check both sides because they usually go at around the same time.

    the only thing left of the seal on my hub was the rubber. all the metal rusted away. years ago they used stainless not soft rustable steel.
  10. Morpheus

    Morpheus New Member

    Thanks j cat, I'll pull that sensor out and see what's up. I'll let yall know what I find out when this whole puzzle is solved.

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