Vibration problem solved!

Discussion in 'Got gears?' started by Gary Crossman, Aug 28, 2012.

  1. Gary Crossman

    Gary Crossman Detmusc70

    Just wanted to let everybody know that I finally got the vibration issue solved. Thanks Larry for your advice. Its been awhile but I developed a pretty bad vibration at around 60 mph and higher after Installing a Gear Vendors OD and ended up with a 5 degree negitive tranny angle. after asking Larry what he did I ended up really modifying the tunnel. I never knew how much steel could stretch. I was able to get the tranny angle back to the stock 3 degrees. Vibration problem solved.

    Thanks Larry and everyone

    Gary
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Glad you got it done!:TU:
     
  3. sailbrd

    sailbrd Well-Known Member

    Gary, could you add a little more detail? I have had the same vibration with 200-4r.
     
  4. Gary Crossman

    Gary Crossman Detmusc70

    Doug,

    I always seem to learn everything the hard way, but a little hard work never hurt anyone right? What I found out was you can not really have anymore than a 3 degree difference in your u-joint angles. I ended up with a 5 degree diff. in the tranny u-joint and had about 1 in the rear. I bought the adjustable upper control arms to adjust the rear angle closer to the front because they should be close to cancel each other out. That did not work. So I knew what I had to do and that was to hammer the living **** out of the tunnel to get the tranny up. I ended up getting the tranny up and ended up with a 3 degree angle, the driveshaft is at an 1 1/2 degree angle and the rear right now is at a 2 degree angle. I am going to tweek the rear with the adjustable arms to match closer with the front u-joint angle. hope this helps. The first things to check are the u-joints and driveshaft for any issues though.

    Gary
     
  5. sailbrd

    sailbrd Well-Known Member

    With the 200-4r I have no problem with room so do not have to beat anything. I have new trans, converter, driveshaft, and adjustable upper control arms.

    So your experience is that neither u joint can have more than 5* irrespective of pinion angle? It looks like you have 1* of pinion angle. You really do not want to have less than that. Have to break down and get a good angle finder and recheck all my angles. Thanks for sharing this info.
     
  6. Gary Crossman

    Gary Crossman Detmusc70

    Just make sure you check all the angles with the weight of the car on all the wheels. I jacked the car up then placed 8x8x16 blocks under the wheels.

    Gary
     

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