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driveshaft question with 14bff swap?

Discussion in 'The Garage' started by MJB774X, Mar 4, 2003.

  1. MJB774X

    MJB774X 1/2 ton status

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    tomorrow I'm going to install my 14bff,also I'm going to do a doit yourself shackle flip, I also made my own zero rates which will move the axle back 1" from the original location. My question is am I going to have to shorten my drive shaft do to the longer housing? will I have to put a different yoke with a different u-joint on the end? or will the 1/2 ton u-joint fit in the 14bff yoke? /forums/images/graemlins/usaflag.gif
     
  2. ZonkRat

    ZonkRat 1/2 ton status

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    I assume you're going for 5-6in lift with zero's and flip so shaft will prob be OK.Longer pinion on 14B should equal extra length of lift.You prob can get a conversion joint to work,but,the small end of the joint will wear faster than normal.1330 to 1350 is #447{pretty sure},don't know what 1310 to 1350 is. /forums/images/graemlins/thumb.gif
     
  3. MJB774X

    MJB774X 1/2 ton status

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    so the joints are a different size then?
     
  4. ZonkRat

    ZonkRat 1/2 ton status

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    All the 14Bs I've seen run 1ton 1350 series joints.It's the same cross size as 1330 with larger dia. /forums/images/graemlins/thumb.gif
     
  5. K5Dan

    K5Dan 1/2 ton status

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    yes they are different.you can get it at napa .
     
  6. MJB774X

    MJB774X 1/2 ton status

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    so you can put the cups from the 1350 on the 1330 cross? keeping the 1330 cups on the driveshaft yoke and using the 1350 cups on the 14 bolt yoke? or do I have to get a different yoke welded on the driveshaft? I'm not to clear on what you meen
     
  7. ZonkRat

    ZonkRat 1/2 ton status

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    Nope.The OD of the bearing surface is larger too.Have to run #447 conversion joint. /forums/images/graemlins/thumb.gif
     
  8. MJB774X

    MJB774X 1/2 ton status

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    is that a napa part #?
     
  9. Swanson52

    Swanson52 1/2 ton status

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    [ QUOTE ]
    Longer pinion on 14B should equal extra length of lift

    [/ QUOTE ]

    Wes disproves this theory here . Look at the second post.
     
  10. ZonkRat

    ZonkRat 1/2 ton status

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    The ones I use are Precison by Federal Mogul #447. /forums/images/graemlins/thumb.gifMy mistake on pinion length.I just know that mine worked OK with about the same setup.SWB truck may make a difference.Sorry. /forums/images/graemlins/thumb.gif
     

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