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    DIF whining

    Looking for good replacement original MK 2 auto dif, failing getting replacement can anyone recommend someone to recon?

    Assuming I need to change! Noise occurs around 60 Mph under load! Is it the dif gearing or just bearings?.
    Mal
    77 TRV8 All original

    #2
    I am a newbie but have been told that even a recondidtioned one can whine. It appears to be a common problem, I have it too. I have been wondering about fitting a limited slip diff but they are not cheap.

    Comment


      #3
      It is unfortunate that we seem to have lost all the experienced diff rebuilders in the United Kingdom. I have an on-going problem with mine.
      I have been told that Paddocks have some rebuilt diffs with new CW&P which are quiet.
      There's also EJ Wards who apparently have new CW&P (which they famously didn't fit on the Trans-America Stag) but I hear they are even less cheap.
      Mabel is a white 1972 Mk1˝, TV8, ZF 4HP-22 auto,
      2016 RBRR finisher. 400 mile C2C 21/22 April 2018!

      Comment


        #4
        Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
        Cheers Ian A

        Comment


          #5
          Originally posted by stag8manod View Post
          Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
          Cheers Ian A
          Yeah, good call, I'll have a look round, cheers
          77 TRV8 All original

          Comment


            #6
            Originally posted by stag8manod View Post
            Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
            Cheers Ian A
            !!
            What and lose out on acceleration? IMHO part of the pleasure of driving a Stag and vital for survival on UK roads. Driving in NZ is a pleasure in itself but since the national speed limit is 100kph (62mph) I cannot really see the point of upping the ratios there let alone here.

            For higher ratios without compromising performance then the MOD does this as standard - otherwise the ZF 4 speed autobox swap I believe does something similar.

            H

            Comment


              #7
              3.45:1 diff and ZF 4-speed. Still surprises many moderns at the traffic light Grand Prix.
              Dave
              1974 Mk2, Carmine, ZF 4HP22 Auto, 3.45 Diff, Datsun Driveshafts.

              Comment


                #8
                Niss.
                A limited slip diff will still need a good/silent Stag crown wheel and pinion, if you are thinking have one assembled in your Stag housing, ready to fit. It is only the "Differential" gears that are replaced with a locking system in a limited slip version.
                Mike.

                Comment


                  #9
                  Originally posted by Niss View Post
                  I am a newbie but have been told that even a recondidtioned one can whine.

                  It's because the new crown and pinions are SH..T!


                  Here's what some muppet tried to do in France with one.****_repro_crownwheel_2555.jpg
                  ..actually succeeded in getting pinion height 1mm out ...yes 40 thou!!! I could scarcely believe my eyes!!

                  OEM v NEW crap

                  Crap
                  repro_kk_2559.jpg
                  OEM
                  oem_pinion_2560.jpg

                  See!
                  oem_v_repro_2554.jpg

                  oem_v_repro_2558.jpg

                  These are the TR4A ones, which are already horrible, note how the hardening has gone through with the misalignment in about 1500kms.

                  I had to replace the entire internals on this one, and deliver personally to the south of France.

                  The stag ones are just plain rubbish.

                  Comment


                    #10
                    we should change the title to Down the plug ole whining

                    come on geeza, we all know everything on the stag is sh...t you keep telling us :P

                    why not contribute to how OP might fix his whining diff rather than telling us everything is sh..t? eh?

                    Back to OP
                    The diff nose bearing does have a habit of chewing out bearings, I had a poor quality supply issue years ago, they only lasted maybe a few thousand miles before they started to growl again.

                    If the diff is coming off anyway, take a look into the diff nose housing around the quill shaft, if there is a build up of wet grease then the bearing may have failed. easy enough to replace once the diff is out anyway.

                    Setting up a diff with new crownwheel etc is a faff and specialist job, folk who used to do this seem to have gone the same way as the autobox specialists. as stuff in the marketplace becomes less rubbish (eh DTPH ) demand for specialists becomes less so and the shut up shop. Paradoxically folk who now need this service have to pay those specialists more to do the job proper

                    Options would seem to be
                    1. change fluid and live with it
                    2. search out a quiet "er" diff second hand, they do exist. I had an auto diff in my garage until a few years ago. sold it though when I went Man O/D
                    3. pay EJWard etc good money for a good diff
                    4. go down the BMW diff route

                    Sorry I cant be any more helpful
                    Stags and Range Rover Classics - I must be a loony

                    Comment


                      #11
                      Originally posted by richardthestag View Post
                      we should change the title to Down the plug ole whining

                      come on geeza, we all know everything on the stag is sh...t you keep telling us :P

                      why not contribute to how OP might fix his whining diff rather than telling us everything is sh..t? eh?
                      I just did.
                      Did you notice?
                      Did you get the less than subtle message?

                      YOU FIT ORIGINAL OEM PARTS, and rebuild the thing properly.

                      Go ask Marcus up in "scaryport"
                      he's a nice guy and appears to know what he's doing.

                      Happy now?

                      Comment


                        #12
                        Originally posted by down_the_plug_hole View Post
                        YOU FIT ORIGINAL OEM PARTS, and rebuild the thing properly.
                        So now all that remains is finding a seller of those rather elusive original OEM parts and all's hunky dory!

                        Cheers,
                        Joakim
                        1975 Triumph Stag - TV8 & MOD. Still in sickbay...

                        Managing Linkedin groups Triumph Car Owners and Enthusiasts & Triumph Nederland

                        Comment


                          #13
                          that's the ticket
                          Stags and Range Rover Classics - I must be a loony

                          Comment


                            #14
                            Originally posted by down_the_plug_hole View Post
                            Go ask Marcus up in "scaryport"
                            he's a nice guy and appears to know what he's doing.
                            I'll second that.
                            Mabel is a white 1972 Mk1˝, TV8, ZF 4HP-22 auto,
                            2016 RBRR finisher. 400 mile C2C 21/22 April 2018!

                            Comment


                              #15
                              Originally posted by jagorstag View Post
                              So now all that remains is finding a seller of those rather elusive original OEM parts and all's hunky dory!
                              Well if you ask, I am sure Marcus has one in stock.

                              You will only need a translator.

                              Comment

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