'66 Idler Arm Part Number - NCRS Discussion Boards

'66 Idler Arm Part Number

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  • Don Z.
    Expired
    • August 31, 1998
    • 254
    #1

    '66 Idler Arm Part Number

    Can anyone help me with the original GM part number for the idler arm? I have looked at my AIM front to back and back to front. There is no reference to the arm that I can find. The only page that shows where it goes only shows the bolts. That is UPC 9 / A2 or my page F208. Maybe my book is missing it ! Any help appreciated. Thank You
    Tags: None
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    • Rich P.
      Expired
      • January 11, 2009
      • 1361
      #2
      Re: '66 Idler Arm Part Number

      Don,

      off hand I can give you the last 3 numbers embossed on the lower arm. They are 185 I don't recall the whole # I'm sure some one will chime in or if you do a search for idler arm it should be in the archives.

      Rich
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        • Peter J.
          Very Frequent User
          • September 30, 1994
          • 586
          #3
          Re: '66 Idler Arm Part Number

          GM #3779184 Part number not forging number
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            • Don Z.
              Expired
              • August 31, 1998
              • 254
              #4
              Re: '66 Idler Arm Part Number

              Thanks Guys, the only number I have on the arm is 3779195 GM, But I don't know if it goes to my '66. Thanks
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                • Don Z.
                  Expired
                  • August 31, 1998
                  • 254
                  #5
                  Re: '66 Idler Arm Part Number

                  Rich & Peter, I stand corrected. I looked under a more powerful magnifier and the next to the last number could be an "8" in lieu of a "9".
                  So I have 3779185. I guess that is correct. Thanks again for the help.
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                    • Joe L.
                      Beyond Control Poster
                      • January 31, 1988
                      • 43193
                      #6
                      Re: '66 Idler Arm Part Number

                      Originally posted by Don Zullinger (30928)
                      Rich & Peter, I stand corrected. I looked under a more powerful magnifier and the next to the last number could be an "8" in lieu of a "9".
                      So I have 3779185. I guess that is correct. Thanks again for the help.

                      Don----


                      As Peter mentioned, the PART number for the idler arm assembly is GM #3779184. This number appears nowhere on the part, though. The forging number on the shaft component of this piece is GM #3779185. However, the same shaft is used for TWO different idler arm assemblies, so you can't positively identify the idler arm by the forging number on the shaft. One of the assemblies is for 63-82 Corvettes and the other is for some 1963 light trucks.

                      The way you tell the difference between them is to look at the BRACKET component of the assembly (i.e. the part that bolts to the frame). On a Corvette piece, the bracket has a single offset. On the truck piece, the bracket has two offsets.
                      In Appreciation of John Hinckley
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                        • Mike M.
                          Director Region V
                          • August 31, 1994
                          • 1463
                          #7
                          Re: '66 Idler Arm Part Number

                          No Don, you didn't miss it. It is not there.
                          The Idler arm part # is not listed in the A.I.M. due to its being a component of the provided steering linkage assembly.
                          HaND
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                            • Don Z.
                              Expired
                              • August 31, 1998
                              • 254
                              #8
                              Re: '66 Idler Arm Part Number

                              Many Thanks to everyone. That was what I was looking for.
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