Torsen Diff in FWD Gearbox

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  • Tonks4x4
    Retired OG Mod
    • Nov 2005
    • 3062
    • Country: United Kingdom

    #1

    Torsen Diff in FWD Gearbox

    Has anyone successfully fitted an S2 torsen diff from a quattro gearbox into a FWD gearbox?

    If so, is there any particular pit falls etc?


    Tonks4x4 - The Land Rover Specialist
    Audi Nut!!!
  • Error404
    Super Moderator
    • Mar 2007
    • 19789
    • Country: United Kingdom

    #2
    the FWD doesn't use a centre diff? Do you mean a V8 rear torsen into a FWD gearbox?
    Panthero Coupé quattro 20vt
    Indigo ABY coupé
    Imola B6 S4 Avant

    Comment

    • irishs2
      S2Forum Fiend
      • Apr 2009
      • 2455
      • Country: Ireland

      #3
      Me being strictly a theoryboy, I think I read that you had to use a porsche rear lsd diff in a fwd box, as some porsche had that gearbox in the rear. and that the audi front diff was smaller than the rear audi diff.
      I could be wrong though.
      Eric

      95 S2 Avant under rebuild.

      Comment

      • UrS4boy
        S2Forum Obsessed
        • Feb 2006
        • 11859
        • Country: Canada

        #4
        Originally posted by Tonks4x4
        Has anyone successfully fitted an S2 torsen diff from a quattro gearbox into a FWD gearbox?
        The S2 torsen is meant to distribute torque to the front and/or read wheels so it would make NO sense (sorry) to fix a S2 torsen diff to a FWD gearbox.
        RS2'd 93 UrS4 5 spd sedan
        94 UrS4 V8 6 spd manual avant

        Comment

        • G60Rallye
          S2Forum Extremist
          • Dec 2006
          • 1321
          • Country: United Kingdom

          #5
          I am sure Brian is asking about the front diff not the centre diff. As if you were using the box bolted to a mid engined set up driving the rear wheels.

          Comment

          • Tonks4x4
            Retired OG Mod
            • Nov 2005
            • 3062
            • Country: United Kingdom

            #6
            Originally posted by G60Rallye
            I am sure Brian is asking about the front diff not the centre diff. As if you were using the box bolted to a mid engined set up driving the rear wheels.
            Yes exactly this sorry guys I was not too clear.

            I shall have a mid engined rear wheel drive car using the Audi FWD box.

            My concern is that it will just spin up one rear wheel all the time as this is what it used to do when I fitted a 20vt in a FWD cabriolet.

            So I just wanted to know if I could use the diff out of the quattro box to use as an LSD or torsen to distribute drive equally to each side?


            Tonks4x4 - The Land Rover Specialist
            Audi Nut!!!

            Comment

            • irishs2
              S2Forum Fiend
              • Apr 2009
              • 2455
              • Country: Ireland

              #7
              I might have had it backwards but would this be of interest
              http://www.924board.org/viewtopic.php?t=23820
              Eric

              95 S2 Avant under rebuild.

              Comment

              • caterpillar
                S2Forum Fiend
                • Jun 2004
                • 2480

                #8
                porshe 924 or some modells; does have a fwd audi tranny in the rear( as a transaxel; with lsd diff) even the engine are in the front....

                Comment

                • djh
                  S2Forum Extremist
                  • Jun 2011
                  • 1622
                  • Home: United States Current: United Kingdom

                  #9
                  yes but the lsd's in most of them are trash now, finding a good one's a nightmare apparently.

                  check out this forum and comments

                  http://forums.tipec.net/viewtopic.ph...103748#p103748

                  Comment

                  • UrS4boy
                    S2Forum Obsessed
                    • Feb 2006
                    • 11859
                    • Country: Canada

                    #10
                    Originally posted by Tonks4x4
                    ...So I just wanted to know if I could use the diff out of the quattro box to use as an LSD or torsen to distribute drive equally to each side?Tonks4x4 - The Land Rover Specialist
                    You'd have more chance if you figured a way to install a V8 Torsen rear diff in that FWD trans case.
                    RS2'd 93 UrS4 5 spd sedan
                    94 UrS4 V8 6 spd manual avant

                    Comment

                    • Henkjan
                      S2Forum Extremist
                      • Aug 2003
                      • 1705
                      • Country: Netherlands

                      #11
                      I have seen 1 successfull attempt, on the urgewalt forum (typ85) in Germany someone installed a Torsen into the dif of a FWD typ81 coupe. it was a struggle but he got it working.

                      Comment

                      • Error404
                        Super Moderator
                        • Mar 2007
                        • 19789
                        • Country: United Kingdom

                        #12
                        There was a forum member on here IIRC from Scandinavia who had done this, IIRC on a Type81 or 85 car.
                        IIRC he had to machine the diff carrier to mount the correct size bearing to fit in the gearbox casing. Or if you use a 5spd 01E box then Quaife and Wavetrac do a drop in helical diff, or you could get a conventional plated diff made up by Gripper etc - I think this would be the best option
                        Panthero Coupé quattro 20vt
                        Indigo ABY coupé
                        Imola B6 S4 Avant

                        Comment

                        • andy10v
                          S2Forum Zealot
                          • Mar 2009
                          • 5996
                          • Country: Scotland

                          #13
                          Are you using an 01A?

                          V8 torsen into 01E info

                          so, after lots of time in etka and a good amount of time searching through old threads on here, i decided to see if anyone else has gone down this road. the idea here....take a V8 rear diff...and put it in the front of an 01E transmission case. effectively getting yourself a front LSD for a...


                          Interesting info on exploding Torsen's as well

                          Also there are two different types of Torsen diff, one machine from a single chunk of material and one that is a multi-piece unit. The multi piece units are the failure prone ones I've experienced. Not had an issue with the single piece
                          Current-2004 Impreza PPP wagon

                          Sold-92 3B coupe-RS2+, 996s, konis, rear torsen, forged rods........
                          Sold ABY-stock

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