My truck viabrates and shakes in high speeds (70km/h +) when i am in 4×4?

I drive a 4×4 gmc sierra 2500 HD its not the lube or a tire rotation i lifted the truck off the ground next step?

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8 Responses to My truck viabrates and shakes in high speeds (70km/h +) when i am in 4×4?

  1. bandit_60 May 27, 2010 at 12:00 am #

    your not suppose to drive fast in 4 wheel drive.

  2. erikf15038 May 27, 2010 at 12:00 am #

    I would check the suspension make sure you have everything properly installed and all the bolts torqued to spec.

  3. garylee May 27, 2010 at 12:00 am #

    Driveshafts or CVJs

  4. jayt May 27, 2010 at 12:00 am #

    your not suppose to drive those in 4×4 over 50mph. check the fluid in the transfer case, rotate the tires.

  5. Dave K May 27, 2010 at 12:00 am #

    If you’re able to go over 70+ in 4×4 then you shouldn’t have it engaged.

  6. mdgor1 May 27, 2010 at 12:00 am #

    it sounds like a universal joint on the front drive-shaft. check for play in the joints and if there is some deal with it right away. i had a front shaft come off once and it is like having a catapult under you and it also broke the housing on the transfer case. fairly inexpensive to repair but very expensive if not looked after right away.
    the youtube page with video instructions.
    http://www.youtube.com/results?search_query=how+to+replace+universal+joints&search_type=&aq=0m&oq=replace+universal+joint

  7. COLONEL CORN May 27, 2010 at 12:00 am #

    Look up "drive-shaft phase", if someone before you has had the front drive shaft off, the phasing of the drive shaft may be incorrect. Phase is the relation of the u-joints adjacent to each other on the same drive-shaft. Check it out, it will cause what you’re describing. As for the advice that you shouldn’t be in 4wd over 70km/hr. I call Bull—-. That’s why there is a high and low range. You shouldn’t be on dry pavement in 4wd that’s all. Obviously low is great for crawling around in the bush or pulling a stump out of the ground and high is for driving around highway speed. Almost all 4×4 techs would tell you to use 4×4 for a bit at least once a month just to keep all the moving parts from crudding up or rusting from lack of use. Also see if the driveshaft is straight or maybe is dented, or missing a weight. As someone else stated, check the u-joints, cv-joints/axles, good luck

  8. Bob Loblaw May 27, 2010 at 12:00 am #

    why are you going that fast in 4×4.?its your tires or tie rods that need looking into.