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Stuck With a Lift Kit Problem????

Discussion in 'The Garage' started by looloozu, Oct 30, 2006.

  1. looloozu

    looloozu Registered Member

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    Ok so i got a 4" lift kit. for my 81 blazer/ Kit(new leafs,shocks, stearing arm and rear shakle flips) Got the kit installed and seems to be fine BUT!!! when i drive down the road the truck shakes ALOT. I didnt have the problem before the kit. I took the front shaft out and im waiting for the new one. So the front shaft ant maken it shake. I tryed with the wheels locked and unlocked no change. The rear shaft seems to be fine and i have 2degs from tcase to rear axle. so i think im fine there. the local tire shop said my tires and aligment are ok. i have no movement in the rear axle from side to side and new u joints all around. But i still have a funny shake. and its a big shake. so much i dont drive it. it only shakes when i give it the gas. no matter the speed 10,20,30 and i let off the gas and she smooths right out. anyone have any ideas?????
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    are all the leaf spring bolts tight? how about ubolts? did you retorque them after putting a few miles on it?
    does it feel like its coming from the front or the rear?
     
  3. looloozu

    looloozu Registered Member

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    yea i checked all the ujoints and the leafs everything is nice and tight. and i cant tell from witch end its so bad the whole truck shakes. the only thing i can explain is its like all the lugs are loose on the wheels are flopping around. thats what it feels like. but it only shakes when i give it the gas.
     
  4. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Did you also add larger tires with the lift? Larger tires add more stress in the steering. Could be balljoints, tres or busted wheel bearings.
     
  5. looloozu

    looloozu Registered Member

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    no same tires. 31" no other changes other then taken the front shaft out and correcting the angle in the rear drive line.
     
  6. stockk5

    stockk5 1/2 ton status Premium Member

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    i vote rear ujoint! your rear ujoint is def. the sound i think.. makes a loud deep humm while the whole truck shakes when on the gas but stops when off the gas and coasting?
     
  7. MattK

    MattK 1/2 ton status

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    my vote was gonna be ujoint as well. they are cheap and easy enough replace...might as well eliminate the simple stuff while taking care of some maintenance.
     
  8. ssped

    ssped 1/2 ton status GMOTM Winner

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    If Ujoint is good point the rear pinion up 2 degrees and see if it gets better. I really had to dial mine in to get rid of the vibs and I am only running a rear shackle flip no rear lift on top of that.
     
  9. goldwing2000

    goldwing2000 Guest

    +1 vote for pinion angle

    It should be within 1° of the t-case output angle.
     
  10. JEBSR

    JEBSR 1/2 ton status

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    Make that 2. If thats not it, it sounds like your getting axle wrap while accelerating. My front did that until I fixed the pinion angle. And yes it only did it when I got into the gas.
     

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