Universal steering couplers

Suspension, Steering and Chassis

  1. Belvedere66

    Belvedere66 Well-Known Member

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    Hey all, I have a 72 Demon with stock power steering box and stock column. My factory style coupler hits my headers and some had ground it down to a point where it's unsafe. I have a new stock coupler but it won't clear headers. I'd rather not fight with getting them off to beat the pipe in so I was wanting to find an easy replacement that would be a bit more streamlined and clear the header pipe. I don't want to spend an arm and a leg on a flaming river coupler. I'd like to be around $100 or less total cost with the least amount of modification as possible.

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  2. Johnny Mac

    Johnny Mac www.blueprintengines.com FABO Vendor

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  3. rklein383

    rklein383 Well-Known Member

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    • Belvedere66

      Belvedere66 Well-Known Member

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      I've seen the term DD used before. What exactly is a double d shaft?
       
    • Johnny Mac

      Johnny Mac www.blueprintengines.com FABO Vendor

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      download.jpeg.jpg
      It's a round shaft that has flats put on both sides. So it can't rotate inside a coupler.
       
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      • Belvedere66

        Belvedere66 Well-Known Member

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      • thesiren74

        thesiren74 Well-Known Member

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        I used a coupler from speedway motors and welded/ pinned it.
         
      • RustyRatRod

        RustyRatRod Weenie idiot loser. FABO Gold Member

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        Into a female hole of the same shape. Usually retained with a set screw and sometimes even welded in place.
         
      • thesiren74

        thesiren74 Well-Known Member

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        20190319_164800.jpg 20191118_160320.jpg
         
      • Johnny Mac

        Johnny Mac www.blueprintengines.com FABO Vendor

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        I forget the year cut off, but some have a telescoping shaft, that extends down, so that extra extension piece isnt needed. 73+ maybe? My 74 didn't need it
         
      • thesiren74

        thesiren74 Well-Known Member

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        I just used it after converting to manual last year, i had the old coupler on it still before i changed headers.
         
      • SGBARRACUDA

        SGBARRACUDA ROY FABO Gold Member

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        I had the same issue on my 69 Dart with a set of CPPA headers. I wound up using a u-joint type coupler from Flamming River.
         
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        • GMachineDartGT

          GMachineDartGT Senior Member

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          Even though many have done it, the original coupler has plunge built in to make up for chassis flex. All cars of the era had something similar. When you convert to a solid coupling, you eliminate this feature and put all the load on your column bearing.
           
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          • Kernel Sanders

            Kernel Sanders eating chicken wings and drinking beer

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            Please make note that the MA-Mopar 36 spline is NOT the same spline as the Corvair/Vega, they are NOT interchangeable and will NOT fit.

            Ujoint steering.jpg
             
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            • thesiren74

              thesiren74 Well-Known Member

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              Had this for 2 years and about 8 thousand miles tighter than the factory ever could be with ample header clearance.
               
            • Belvedere66

              Belvedere66 Well-Known Member

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              Right, I believe it's is 0.620 36 spline. I found one at speedway motors for $50. The 5/8 ones are 0.625 so that's probably where people run into issues.
               
            • MOPAR4Me

              MOPAR4Me FABO Gold Member FABO Gold Member

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              • Johnny Mac

                Johnny Mac www.blueprintengines.com FABO Vendor

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                • Belvedere66

                  Belvedere66 Well-Known Member

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                  Yeah that is my main question at this point. Do I get the 5/8" 36 spline or the 0.620" 36 spline?
                   
                • moparmandan

                  moparmandan FABO Gold Member FABO Gold Member

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                • rklein383

                  rklein383 Well-Known Member

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                  Some Mopars such as my e-body had a two piece shaft. I lubed mine up to allow slight in and out movement. Hopefully, that is enough.
                   
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                  • SGBARRACUDA

                    SGBARRACUDA ROY FABO Gold Member

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                    The steering shafts are two piece anyway. So if it need to collapse or extend ever so slightly it will. The two pieces were only held in place by injected plastic.
                     
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                    • GMachineDartGT

                      GMachineDartGT Senior Member

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                      True, but not all shafts have the nylon pieces free.
                       
                    • SGBARRACUDA

                      SGBARRACUDA ROY FABO Gold Member

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                      I learned by pure accident how little it takes to collapse the two shafts, not thinking more than once I tapped the steering wheel to get the coupler on a steering box only to wind up with a column that was to short. I had to then tap them apart. I swear I think the plastic or nylon was put there to prevent a rattle.
                       
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                      • GMachineDartGT

                        GMachineDartGT Senior Member

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                        It deteriorates over time.
                         
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