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1983 14SF yoke/ujoint size?

Discussion in 'The Garage' started by kennyw, Sep 17, 2003.

  1. kennyw

    kennyw N9PHW Premium Member

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    I am replacing a 14FF with a 14SF (my truck originally had a 12 bolt, '79 K10) and found the 348 Napa Ujoint I have in my driveline already doesnt fit. The U-joint appears to be the right width but needs smaller caps. Does anyone have any idea what size the yoke on a 1983 K20 14SF would be?
     
  2. MilpitasK5

    MilpitasK5 1/2 ton status

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    did you try the 447 Napa?
     
  3. heavy4x4

    heavy4x4 1/2 ton status

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    That won't do it...that's got the same 1350 joint as the napa 348.

    Kenny, I thought most 14 bolt SF had 1350 yokes like the FF...guess not. I would venture to say that it has a 1330. So, you'll need a 1310 (driveshaft for 12 bolt) crossed with a 1330 (yoke on the SF). I'm not sure on the napa number for that, however...sorry.
     
  4. kennyw

    kennyw N9PHW Premium Member

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    Thanks for the help... I am going to try the 1310 to 1330 joint out and I guess I can take it back if it doesnt work.

    Anyone know a place I can find dimensions on Std U joint sizes?
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    1330 has 1310 size caps and is as wide as a 1350, so therefore, if your 1350 caps are too big but it's the right width, you want a 1330 joint.

    My 14 bolt SF has a 1350 on it though, always has. I even replaced it a few years back and it was a 1350 before that and the new one I got from GM was a 1350.
     
  6. kennyw

    kennyw N9PHW Premium Member

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    Thanks, looks like the 1310-1330 conversion u joint ....

    **EDIT**

    1310-1330 wasn't the right one... Caps were too small. Found the right joint at NAPA though, part # 372.

    Some notes:
    1310 u joint - 1.0625 dia cap
    1330 u joint - 1.0625 dia cap x 3.625 wide
    1350 u joint - 1.1875 dia cap x 3.625 wide

    I found I needed a 1.125 dia cap x 3.625 wide. Now I just need the correct straps to go with it.
     
  7. MilpitasK5

    MilpitasK5 1/2 ton status

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    /forums/images/graemlins/thumb.gif
     
  8. COCHEV

    COCHEV 1/2 ton status

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    Kenny, what you up to swappin all your parts around? why are you taking that FF out? though you lined up a front end for that? are you still selling it?
     
  9. kennyw

    kennyw N9PHW Premium Member

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    My truck currently has a 1/2 ton front axle with 3.73 gears and had a 2WD 3/4 ton 14FF with 3.73 gears. The axles I found were a 3/4 ton front with 4.10's and a 3/4 ton 14SF with 4.10 and possi. For what I do I would have rather had the D60 rear axle with 4.10's, power lock and FF hubs but seems I traded that off when I found a cheap 14FF with 3.73's that matched my front axle...

    So I had to decide if I wanted to stick with 3.73's or step up to 4.10's. The SF axle has the capacity I need for 33" tires with better ground clearance and less weight. When I build my other trail rig I will be going straight to 1 ton dually axles (D60 front/D70 rear).
     
  10. COCHEV

    COCHEV 1/2 ton status

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    Aaaaah, i see....i think. /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/rotfl.gif

    so you finaly have a matching 4.10 set with a SF. thats cool. /forums/images/graemlins/thumb.gif don't think you'll have problems with that SF and 33s.

    i toor down that 60 today a bit. the bearings looked good and spindles look good for a 66 axle. it needs new seals and i will do new brakes and wheel cyl. while i'm there.

    Sooo, to sort of get back on topic /forums/images/graemlins/grin.gif do you have any idea what size u joints that rear 60 uses?
     

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