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2WD TH400 ... 1350 u-joint?

Discussion in 'The Garage' started by dremu, Mar 12, 2006.

  1. dremu

    dremu Officious Thread Derailer Premium Member

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    I measured it and looks awful close, but it's a PITA to tear the dang thing apart repeatedly.

    Anyboy know, off-hand, if my C30's TH400 yoke is a 1350 U-joint?

    Trying to determine bolt pattern for a driveshaft brake.

    -- A
     
  2. tarussell

    tarussell 1/2 ton status

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    Most every one that I have seen has been . If it has a carrier bearing drive shaft set up sometimes the middle joint is a 1310 on auto equiped trucks but the front and very back joint should be a 1350.

    Tom
     
  3. dremu

    dremu Officious Thread Derailer Premium Member

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    It is a two-piece shaft ... thus my lack of desire to drop it.

    Odd that they'd use a 1310 in the middle; does it see less force, or is it designed as a fuse? =))

    -- A
     
  4. tarussell

    tarussell 1/2 ton status

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    I have no earthly idea why GM did this .
    I would assume that all joints see equal torque assuming the angles are in spec.
    I am not saying that all applications are this way but I have seen way more than the average grease monkey and that rule applies almost everytime without fail.
    Maybe it is because that joint see's very little to no change in angle durring operation and therefore does not need the over build factor that a manual tranny does due to shock loads.

    Tom
     
  5. 79k20350

    79k20350 3/4 ton status

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    hmm then why would the one on the tranny be 1350 too? thats sees no angle change either. man did gm do some weird things
     
  6. tarussell

    tarussell 1/2 ton status

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    I dunno ........:confused:

    Tom
     
  7. R72K5

    R72K5 Banned

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    yeh Gm was odd, just look at the late 70's 3/4 tons that had the different size u joints in the driveline

    common stuff

    good luck
     

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