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Which way to add a tapered block

Discussion in 'The Garage' started by thebird00, Apr 6, 2007.

  1. thebird00

    thebird00 1/2 ton status

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    I know the driveshaft angle thing has been covered alot, but I was helping a bud put a lift on his 93 Dodge which is new front springs and a block in the rear. The block is tapered pretty good. My question is which way should the taper go? With the taper like superlift recommends it (short to the front and tall part to the rear), it puts the differential and driveshaft at zero angle. The angles are about equal between the T case and diff with the block turned around. Just looking for opinions. Thanks
     
  2. jamber2541

    jamber2541 1/2 ton status

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    you have it right, short side forward and tall side to the rear
     
  3. thebird00

    thebird00 1/2 ton status

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    If it isn't a cv driveshaft shouldn't the diff angle be equal to the transcase angle though?
     
  4. DEMON44

    DEMON44 Low-Tech Redneck

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    yes. ideally
     
  5. thebird00

    thebird00 1/2 ton status

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    So would you have the diff pointing down and the angle right or would you have the diff up and the angle at zero? I always thought this would give you vibrations and make the u joints fail cause they were operating at zero angle.
     
  6. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    I think you are measuring the angle incorrectly. In order to have zero angle the pinion has to be pointing straight ahead. Every pinion i've ever seen points up slightly.
     
  7. thebird00

    thebird00 1/2 ton status

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    I'll try to get some pics up with it both ways. When I put my cv shaft in my longbed I was told to move the perches to line the pinion and driveshaft up with 1-2 degrees angle down to allow it to run at zero under throttle. I thought with no cv, the pinion and transcase where supposed to be parallel.
     
  8. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    That is correct. If you're measuring correctly then don't worry about which way the blocks are installed as long as the angles are correct.
     

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