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Still have the vibration

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by wayne, Nov 8, 2001.

  1. wayne

    wayne 3/4 ton status

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    Ok, it is not as bad but it is still there. I have dropped the case 1 1/2"s took 2 degrees out of the pinion but it still looks a little off. I will have to buy an angle finder to make sure though. I am going to get the tires rebalanced at a truck shop since mine have the weight on the wheel and see if that helps any. Reason for the tires is when I let off or put it in neutral it still vibrates. New trans mount is in too. I have an idea on what I may have screwed up on with the angle and that is I think the 1 ton trucks have the pinion turned up more then a half ton and when I welded the purchs back on I added about 2 degrees more angle and think I should have left it where it was.[​IMG] I think with that and my rear blocks (which I will ditch soon for a flip [​IMG]) actually put the pinion up to much. I will check all that and if it is still vibrating then I will have the driveshaft balanced.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  2. Boss

    Boss 1/2 ton status Author

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    Just get the angles to match and you should be golden. Naked eye won't tell you if they match....you definately need an angle finder....they're really cheap. I got mine for like $6.
    Boss

    Pic of my truck Before N' After
    <a target="_blank" href=http://coloradok5.com/gallery/BeforeNAfter>http://coloradok5.com/gallery/BeforeNAfter</a>
     
  3. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Wayne I'm not sure if I understood your post correctly, but if you are worried about the lift blocks angling your pinion up too much, from what I have heard the flip does it even more. With the flip, you may actually have to angle it down. Again this is if I understood your post correctly and what others have said about the flip.
    Just wanted to point that out if it was/is a consideration.
    Others who have done the flip should be able to tell you for sure.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  4. ftn96

    ftn96 1/2 ton status

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    It is near impossible to see 5 degrees or less with the naked eye. the angle finders ROCK!

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  5. MudFrog

    MudFrog 1/2 ton status

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    So how exactly do you find the angle with the angle finder? What do you measure?

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  6. Boss

    Boss 1/2 ton status Author

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  7. ftn96

    ftn96 1/2 ton status

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    Yeah, like Boss said you place the finder on the driveshaft and right that number down then take the driveshaft out. Then place the finder on the flat surface that the u-joint straps bolt into on the yokes. Then subtract the rear angle from the driveshaft angle you wrote down before. This would be the rear working angle. Then you do the same at the T-case. Subtract the T-case angle from the driveshaft angle this gives you the T-case working angle. Then compare the 2 working angles. They should be within 2 degrees of one another.
    Just remember, when you change the angle at one end of the driveshaft it changes the angle at the other and of the shaft as well. Not of equal amounts, but it does change it too. So keep that in mind when you playing with the angles.


    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     

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