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    Is this an LSD?

    Can anyone tell from this photo if my diff is LSD or not? I'm thinking it's not, but need to know what kind of fluid to fill it with. Thanks.

    Sent from my SM-G960U using Tapatalk
    1988 Alpinweiss 325i Convertible

    #2
    yes, lsd
    Lorin


    Originally posted by slammin.e28
    The M30 is God's engine.

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      #3
      Thanks. I couldn't tell because the tag was too rusted.

      Sent from my SM-G960U using Tapatalk
      1988 Alpinweiss 325i Convertible

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        #4
        Google it. Seriously.

        If both output shafts spin together it's an LSD.
        "Tires are our fuse" -Matt Juengel
        1986 325e Sedan | M20B27 parts available for sale |

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          #5
          Thank you.

          Sent from my SM-G960U using Tapatalk
          1988 Alpinweiss 325i Convertible

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            #6
            Originally posted by Andre3127 View Post
            Google it. Seriously.

            If both output shafts spin together it's an LSD.
            Unless it's a mechanical locker like a torsen.

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              #7
              General Discussion is not a catch-all; please do not ask technical questions there. If you don't know where to ask your question, post it in General Technical and we'll move it to the appropriate subforum if necessary. Thanks in advance.
              Originally posted by kronus
              would be in depending on tip slant and tube size

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                #8
                I prefer Redline 75w90 or comparable GL-5 fluid in clutch typs LSD's (such as a stock e30 would have).





                Originally posted by roguetoaster View Post
                Unless it's a mechanical locker like a torsen.

                ...or helical, but highly unlikely in an e30 diff....Torsen came in some z3 diffs, though.
                john@m20guru.com
                Links:
                Transaction feedback: Here, here and here. Thanks :D

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                  #9
                  Originally posted by ForcedFirebird View Post


                  ...or helical, but highly unlikely in an e30 diff....Torsen came in some z3 diffs, though.

                  You can sometimes provide enough load on one output flange to cause a torsen to show function, haven't had a chance to try a helical setup the same way.


                  As an aside, torsens aren't bad in the snow and icy stuff the way I thought they might be, as long as you have even a little grip somewhere you'll go, and when you don't you can brake torque it.

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                    #10
                    Both Torsen and helical will act like an open when one wheel is completely unloaded. This is why they both rotate the opposing wheel opposite when sitting on a bench.

                    Quaife is a 100% helical (I used one in the ls1 swapped Mercedes), but they both actually act similar when a wheel if lifted, but deceleration is argumental.

                    Torsen:

                    https://www.youtube.com/watch?v=JEiSTzK-A2A

                    Helical:

                    https://www.youtube.com/watch?v=W96fOdMZnXE


                    EDIT: Now a viscous acts in a very different way - kinda like a torque converter does in a slushbox transmissions:

                    https://www.youtube.com/watch?v=GDlTOPr_Acs
                    Last edited by ForcedFirebird; 07-08-2019, 08:59 PM.
                    john@m20guru.com
                    Links:
                    Transaction feedback: Here, here and here. Thanks :D

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                      #11
                      A clutch pack (Salisbury), Torsen or Quaife can all load up and prevent wheelspin, up to the limit of their capability.
                      A viscous unit can only react to wheel spin.

                      I thought Quaifes had a small clutch pack or preload spring in the center that gave them something to push against so they can move the car even with one wheel off the ground.
                      Last edited by The Dark Side of Will; 07-09-2019, 06:04 AM.

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                        #12
                        I thought Quaife was another name for Torsen
                        Deck Lid and soft top Shocks on hand

                        Seat shocks on hand for immediate shipment
                        https://www.r3vlimited.com/board/sho...86#post4944786
                        Alice the Time Capsule
                        http://www.r3vlimited.com/board/showthread.php?t=360504
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                          #13
                          Originally posted by The Dark Side of Will View Post
                          A clutch pack (Salisbury), Torsen or Quaife can all load up and prevent wheelspin, up to the limit of their capability.
                          A viscous unit can only react to wheel spin.

                          I thought Quaifes had a small clutch pack or preload spring in the center that gave them something to push against so they can move the car even with one wheel off the ground.


                          Torsen type 2 units have a couple clutch packs so you can move the car in san Francisco parking situations (one wheel airborne). Does nothing when on the track flat out with one wheel airborne

                          https://www.s2ki.com/forums/s2000-un...embly-1161293/
                          OBD1 M54/M52TU swap as a M50b25

                          Z4 non powered steering rack fits e30



                          Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

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