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What u-joints do i need?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by smp, Jan 25, 2001.

  1. smp

    smp 1/2 ton status

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    Well i did the one ton axle swap and wanted to know if any one knows some sizes and/or part numbers for the u-joints it was a dana 44 front and 12 bolt rear to a dana 60 front and a 14 bolt rear.
    Thanks for your help



    <A target="_blank" HREF=http://WWW.SMP.COLORADOK5.COM>http://WWW.SMP.COLORADOK5.COM</A>
     
  2. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    driveshaft u-joints? In the front the u-joint stays the same at 1310, in the rear you will need a combo, 1310 on one side and 1350 on the other. Give Englewood Driveshaft a call at 303-781-0554 and they will hook ya up, now get busy.

    Steve
    [​IMG]
    Mall-Running poseur 4x4 with curb-feelers
     
  3. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I was considering doing this swap, I have a corp 10 bolt front and a FF 14 bolt in rear ('80 K20), and wanted a D60 up front and 1 ton shafts. The rear shaft uses bigger u-joints near T-case end for a 1-ton than 3/4-ton, both use same joint (I think 1350) near rear pinion. I checked the part numbers (for u-joints) on a 1-ton front shaft (connecting to D60) and the part numbers (for u-joints) on 3/4-ton shaft (connecting to corp 10 bolt) and they are different. The 1-ton shaft uses the same u-joint in it's CV joint that the 3/4-ton uses by the front pinion (I think 1330 or 1310), but it uses a different joint (I think 1350) at the pinion, and the 3/4-ton uses an entirely different joint in it's CV joint. The reason I am not sure on the sizes is because these were X-referenced from NAPA numbers (not to say they are the best source, but they have never failed when giving me the parts I need for the application). I do know for sure that they were different part numbers between the 10 bolt front 3/4 ton shaft (same as D44) and the D60 1-ton front shaft.
    For what it's worth..........maybe nothing, but I didn't want you to buy a bunch of joints and then have to go back and exchange them (I could be wrong though). If anybody can correct me and even give me the proper spicer joint numbers (that's what I would use) for the conversion it would be appreciated. Also is there a pinion flange that bolts to the corp 10 bolt to bolt up a stock 1-ton shaft?
     
  4. ken

    ken 1/2 ton status

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    A front Dana 60 uses the same ujoint as a dana 44 or 10 bolt. I have converted two Suburbans to one tons by using Dana 60 fronts and the stock driveshafts (one was a 1/2 ton and the other a 3/4 ton) bolt RIGHT UP to the Dana 60. Therefore, the Dana 60 at the pinion uses 1310 series joints, just like the 1/2 tonners. Also, the 1310 has the most angularity potential than a 1350 series, so consider that.

    ken
     
  5. smp

    smp 1/2 ton status

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    I thought the front looked the same but thought i would check thanks for the info guys.



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  6. TX Mudder

    TX Mudder 1/2 ton status

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    I thought d60's had 1350 yokes???
    I always figured that I'd upgrade my tcase yoke to 1350 when i put on a d60, and buy a custom 1350 driveshaft. No? Just keep it 1310?
    -- Mike
     
  7. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Like I said I have never done the swap myself, but if you go to a parts store and look up the difference in u-joints for a 3/4 ton and a 1 ton they will list different sizes (at least that was the difference in 1980 which is the year of my truck and the year I used when inquiring). I did not try using other years so I may be wrong or maybe we both are right (it may just depend on years). jesse jaynes [forwhlr@saber.net] (530-872-5725) is a driveline specialist at High Angle Driveline and may be able to settle this debate (if anyone lives in the 530 area code and could call or e-mail it would be appreciated if they find out if there are differences between 3/4 and 1 tons and/or D44 and D60 driveshafts, please let us know either way). It seems that a 1350 has less angularity, but a huge increase in strength, and would seem like a logical choice on a non-lifted big block equipped stocker.
     
  8. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    [​IMG] I checked into it further and you guys were correct. The part numbers are different for a 1 ton and 3/4 ton u-joint, but the yoke on a D44/Corp10bolt and a D60 are set up for the 1310 joint. All can be altered by High Angle Driveline to accept a beefier custom shaft with a 1350 joint or for really tall trucks a 1410 joint. So to answer the original post (as other people already correctly did), yes you can bolt the driveshaft up without alterations in the front, and get a conversion joint 1350/1310 joint for the rear near the pinion.
     

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