Bolt size HELP!!!

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  • spechols
    Low Range
    • May 2007
    • 33

    Bolt size HELP!!!

    There are two threaded holes on the bottom of the differential case near the driveshaft. Does anyone know what size, thread, pitch they are?
  • Tim Smith
    Overdrive
    • Nov 2006
    • 1504

    #2
    I'm not understanding where you are talking. Is this a Sals or a Rover case?

    Comment

    • spechols
      Low Range
      • May 2007
      • 33

      #3
      Originally posted by Tim Smith
      I'm not understanding where you are talking. Is this a Sals or a Rover case?
      The bolt holes are the same on both. There are two small holes on the flat bottom of the case near the propshaft.
      I think they are a size 10mm with a 1.25 pitch.

      Comment

      • sven
        1st Gear
        • Dec 2006
        • 174

        #4
        Originally posted by spechols
        The bolt holes are the same on both. There are two small holes on the flat bottom of the case near the propshaft.
        I think they are a size 10mm with a 1.25 pitch.
        That sounds correct. I have the tap if you need it.
        99 D1
        73 Series III 88"
        95 RRC LWB

        Comment

        • SafeAirOne
          Overdrive
          • Apr 2008
          • 3435

          #5
          Originally posted by Tim Smith
          I'm not understanding where you are talking. Is this a Sals or a Rover case?
          It is on later Rover-type differential "third members". My '73 had this type of diff in the front with the Salisbury in the rear. The early Rover diffs didn't have the large rectangular block on the bottom. This block houses the oil passages to the pinion bearings and has 2 threaded holes toward the rear.

          Unfortunately, JUST THIS WEEKEND, I gave my old one away to another Rover enthusiast so I can't confirm the bolt size, sorry...
          --Mark

          1973 SIII 109 RHD 2.5NA Diesel

          0-54mph in just under 11.5 minutes
          (9.7 minutes now that she's a 3-door).

          Comment

          • spechols
            Low Range
            • May 2007
            • 33

            #6
            Originally posted by sven
            That sounds correct. I have the tap if you need it.
            Just need the bolts.
            I will find out today if I am correct.
            Thanks

            Comment

            • Tim Smith
              Overdrive
              • Nov 2006
              • 1504

              #7
              I'm still lost but I'll take everyones word for it that there are said bolts on the third member.


              Old


              New

              Comment

              • KevinNY
                4th Gear
                • Oct 2006
                • 484

                #8
                Mine does not have them either Tim, the coiler difffs have them.
                The Goat, 2.8 Daihatsu Td, '73 coil conversion

                Comment

                • SafeAirOne
                  Overdrive
                  • Apr 2008
                  • 3435

                  #9
                  Originally posted by Tim Smith
                  I'm still lost but I'll take everyones word for it that there are said bolts on the third member.
                  The one with the bolt holes is a different style still...
                  --Mark

                  1973 SIII 109 RHD 2.5NA Diesel

                  0-54mph in just under 11.5 minutes
                  (9.7 minutes now that she's a 3-door).

                  Comment

                  • spechols
                    Low Range
                    • May 2007
                    • 33

                    #10
                    [quote=Tim Smith]I'm still lost but I'll take everyones word for it that there are said bolts on the third member. No bolts, just bolt holes on the underside.

                    Comment

                    • sven
                      1st Gear
                      • Dec 2006
                      • 174

                      #11
                      Originally posted by KevinNY
                      Mine does not have them either Tim, the coiler difffs have them.
                      Yes, Spechols has coiler chassis and axles.
                      99 D1
                      73 Series III 88"
                      95 RRC LWB

                      Comment

                      • Tim Smith
                        Overdrive
                        • Nov 2006
                        • 1504

                        #12
                        Originally posted by spechols
                        No bolts, just bolt holes on the underside.
                        Oh yes! I forgot about those. Thanks for reminding me.

                        Comment

                        • spechols
                          Low Range
                          • May 2007
                          • 33

                          #13
                          Well I found a 10m with 1.25 pitch threads and it does not fit.
                          It is too big in diameter.
                          It looks like 8m is too small.
                          Any ideas?
                          Anyone know the size?

                          Comment

                          • Leslie
                            5th Gear
                            • Oct 2006
                            • 613

                            #14
                            Whitworth!

                            J/K!


                            I dunno......


                            Why are they there? For mounting a skid-plate for protecting the u-joint?
                            -L

                            '72 SIII SW 88"
                            '60 SII 88" RHD

                            Comment

                            • spechols
                              Low Range
                              • May 2007
                              • 33

                              #15
                              Originally posted by Leslie
                              Why are they there? For mounting a skid-plate for protecting the u-joint?
                              My guess is that they are there for assembly or something, but yes - I want to use them to mount a skid plate.

                              Comment

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