Differential problem after seal change - HELP!

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  • Uber E30
    E30 Fanatic
    • Aug 2008
    • 1409
    #1

    Differential problem after seal change - HELP!

    Ok so i changed out both flange seals and the driveshaft seal as well as a new gasket, and a few various other things. The Diff was spinning freely before i did this.

    I go to reassemble it and get everything finger tight, all seems good. I tighten down the passenger side flange and it still spins freely. I tighten down the driver side flange and it wont budge. I lossen the bolts and it spins again. Checked the bearing and it spins great, reseated the flange several times. Im at a loss. Any help would be greatly appreciated. My landlord is getting pissed at me for having the car on jackstands for 2 weekends now.
    -Alex
    Tags: None
    • DCColegrove
      Banned
      • Dec 2007
      • 2748
      #2
      You changed the pinion seal? (input shaft)

      I'm afraid I have bad news for you...

      You can't just do that because there is a crush sleeve (one shot deal) that sets the pre-load on the pinion bearings...and in turn sets the mesh (depth) on the ring and pinion gears.

      It's possible there is something else goin on but...

        Comment

        • dashboardmonkey
          FUCK YOUR WAFFLES
          • Jun 2008
          • 6158
          #3
          Sounds like the cover is hitting the diff internals.

          Check your clearances between cover and internals with some plumbers putty or clay.

          Hope this helps.

          Andy

          Edit: Sorry I mis read some. I thought you were talking about the cover.
          -Andy

            Comment

            • Uber E30
              E30 Fanatic
              • Aug 2008
              • 1409
              #4
              It has a new crush washer and i marked the input shaft nut.
              -Alex

                Comment

                • Uber E30
                  E30 Fanatic
                  • Aug 2008
                  • 1409
                  #5
                  ok got it figured out after i took the thing apart again. Apparently the left and right flanges were being picky about which side they were on. I swaped them bolted it down and they spun perfectly. I know they are the same part number, but maybe they had different wear levels over 20 years. So, my advice to anyone changing the seals is to mark each side :)
                  -Alex

                    Comment

                    • DCColegrove
                      Banned
                      • Dec 2007
                      • 2748
                      #6
                      Originally posted by Uber E30
                      ok got it figured out after i took the thing apart again. Apparently the left and right flanges were being picky about which side they were on. I swaped them bolted it down and they spun perfectly. I know they are the same part number, but maybe they had different wear levels over 20 years. So, my advice to anyone changing the seals is to mark each side :)
                      All good then...

                      Scared me for a second...

                      I actually didn't want to tell you.

                        Comment

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