1. Gregg DeGeorge

    Gregg DeGeorge Well-Known Member

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    Hello all ,putting drivetrain in a 70 Roadrunner anyway I have the big block drive shaft it has the large u joint both ends looking for a combo joint my center section probably from a a body has the small yoke it’s a 42 case ,anyone know what u joint I need thought it was 347 that’s not wide enough thanks Gregg
     
  2. 4mulas

    4mulas Well-Known Member

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    I don’t know, but maybe you could consider changing the yoke on the Center section? Then you can keep the integrity of the large u-joint shaft intact..
     
  3. themechanic

    themechanic Oklahoma is OK FBBO Gold Member

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    • R413

      R413 Well-Known Member

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      You probably need a 7260 to a 7290 joint. I’ve heard Dr Diff has them available. He is a great and helpful vendor for us mopar folks!
       
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      • themechanic

        themechanic Oklahoma is OK FBBO Gold Member

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        • Fran Blacker

          Fran Blacker FBBO Gold Member FBBO Gold Member

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        • BSB67

          BSB67 FBBO Gold Member FBBO Gold Member

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          It will be either a 1330/7290 conversion, or a 7260/7290 conversion.

          The 1330/7290 cross is actually the same cross as the 7290/7290. Only the caps are different.
           
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          • Gregg DeGeorge

            Gregg DeGeorge Well-Known Member

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            Thanks for the info I know I bought one these at NAPA wasn’t even two years ago just forgot the number thanks again
             
          • OKDart

            OKDart Well-Known Member

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            I believe the 347 is for the 7260/7290 conversion
             
          • john-9

            john-9 Member

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            7260 small to 7290 large u-joint -- Spicer # 5-527X ---- TRW ( Federal-Mogul ) # 20226 ---- Precision ( Moog ) # 347
            Denny's Driveshafts has what you need.
             
          • Rusty 72

            Rusty 72 Well-Known Member

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            Look up Spicer online. They have charts with sizes ear to ear and all sorts of different combinations.
             
          • Gregg DeGeorge

            Gregg DeGeorge Well-Known Member

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            Ok I bought thev7260;7290;fit drive shaft fine but wasn’t wide enough for my pinion flange it measures 31/4 wide I need 31/2wide diameter of u joint is fine just not wide enough ?.So I must need 1330/7290 ??
             
          • Fran Blacker

            Fran Blacker FBBO Gold Member FBBO Gold Member

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            Cup size on 1330 is 1.0625 and is 3 5/8 wide. The yoke for a 1330 has two small tabs on outside of where cups mount. Note tab where cup mounts. If no tab on yoke pot a pic of yoke measure diameter of u1330 1.JPG cup. u1330 1.JPG
             
          • Gregg DeGeorge

            Gregg DeGeorge Well-Known Member

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            Thanks I bought the wrong joint again maybe third time the charm 1330 seems to be the right width ,the other combo joint cup size was fine but not wide enough illl give it another try
             
          • Fran Blacker

            Fran Blacker FBBO Gold Member FBBO Gold Member

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            1330 7290 and 1350 are the same width it's the cup size that's different.
             
            Last edited: Feb 18, 2020
          • BSB67

            BSB67 FBBO Gold Member FBBO Gold Member

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            Are you SURE that the 7260 cup fit? The 1330 and 7260 cups are different sizes.
             
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