Installing transmission for 3 hours, still stuck. 0.75" Gap, pilot bearing?

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  • rcfanatic
    E30 Addict
    • Feb 2009
    • 490

    #1

    Installing transmission for 3 hours, still stuck. 0.75" Gap, pilot bearing?

    I'm almost done with this project, but of course I have another setback.. aside from the rain every few hours...

    Twice I have gotten the transmission installed such that there is a 3/4" gap keeping it from mating completely with the engine. The input shaft must be somewhat in place because if I lower the jack the transmission will stay suspended.

    When I installed the pilot bearing, I installed it flush with the surface of the flywheel. I couldn't drive it deeper because I don't have anything that is the right diameter except for the old bearing, which I didn't want to get stuck inside the flywheel assembly.

    So, is the bearing causing the problem? Does it need to be recessed more to allow the shaft to insert further? Do I just need to keep wrestling with the transmission?
    Attached Files
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  • drumad
    E30 Mastermind
    • Aug 2009
    • 1700

    #2
    Pilot bearing should be against the inner lip that's within the hole. Lip obviosly stops it from going any deeper. This is how it was on my 240 at least. Then again at you sure you're shoving the tranny enough into it?

    Edit: crap the 240 has a pilot bushing vs a bearing. I think you need to wrestle with it more. Took me like three hours to finally get m 240's bell hosing flushing with the engine.

    Edit2: you're also 3/4" away so you should be money. Keep rassling with it.
    Last edited by drumad; 08-15-2010, 11:46 AM.
    2008 335i - n54b30
    1991 318i - m52b28
    1994 fzj80 - LAND CRUSHER

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    • rcfanatic
      E30 Addict
      • Feb 2009
      • 490

      #3
      I'm pushing it and shaking hard enough to slide myself backward on the ground..
      sigpic

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      • rcfanatic
        E30 Addict
        • Feb 2009
        • 490

        #4
        Another way to answer the question is whether the diameter of the splined portion of the input shaft is small enough to even fit into the hole with the pilot bearing.
        sigpic

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        • drumad
          E30 Mastermind
          • Aug 2009
          • 1700

          #5
          I used vice grips to close the gap between the engine an the bellhousin flange.

          Edit: as soon as you can start getting those bolts on too
          2008 335i - n54b30
          1991 318i - m52b28
          1994 fzj80 - LAND CRUSHER

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          • rcfanatic
            E30 Addict
            • Feb 2009
            • 490

            #6
            I actually tried using clamps to draw it in about .200" but it just sprung back out when I removed them
            sigpic

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            • drumad
              E30 Mastermind
              • Aug 2009
              • 1700

              #7
              Keep at it and get those bolts started. That's all I got. Then again hopefully you're not some 100 lb malnourished child doing this.
              2008 335i - n54b30
              1991 318i - m52b28
              1994 fzj80 - LAND CRUSHER

              Comment

              • rcfanatic
                E30 Addict
                • Feb 2009
                • 490

                #8
                It would be one thing if I could see progress, but no matter how much I try it just stays at 3/4". I'm stronger than most men which leads me to believe I'm wasting time/effort.
                sigpic

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                • drumad
                  E30 Mastermind
                  • Aug 2009
                  • 1700

                  #9
                  Ca you get the bolts started at least? Oh one other thing. If your engine gives when you shove forward, then that's preventing alot of your force from going into the pilot shaft.
                  2008 335i - n54b30
                  1991 318i - m52b28
                  1994 fzj80 - LAND CRUSHER

                  Comment

                  • Teaguer
                    R3V OG
                    • Sep 2004
                    • 6167

                    #10
                    Seems like you may not have the angle of attack right.
                    Tilt up the rear and start wiggling it and shoving it towards the engine. It will give.

                    E30 M3 / E30 325is / E34 525iT / E34 535i

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                    • rcfanatic
                      E30 Addict
                      • Feb 2009
                      • 490

                      #11
                      Teaguer: Can you confirm if the pilot bearing is correct?
                      sigpic

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                      • erik325i
                        No R3VLimiter
                        • Jan 2005
                        • 3567

                        #12
                        Did you make sure your clutch disk is perfectly centered? If it's off, then the transmission shaft will slide though the clutch disc splines but won't match up perfectly with the pilot bearing making it difficult install.

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                        • Teaguer
                          R3V OG
                          • Sep 2004
                          • 6167

                          #13
                          It is ok. If it does need to go back slightly the input shaft and tranny would seat it without any issues. Thats not your hangup.

                          E30 M3 / E30 325is / E34 525iT / E34 535i

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                          • rcfanatic
                            E30 Addict
                            • Feb 2009
                            • 490

                            #14
                            Originally posted by erik325i
                            Did you make sure your clutch disk is perfectly centered? If it's off, then the transmission shaft will slide though the clutch disc splines but won't match up perfectly with the pilot bearing making it difficult install.
                            Yep used the alignment tool, everything fitted as it should.

                            Erik: Can you confirm if the pilot bearing is correct from the first picture?
                            Attached Files
                            sigpic

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                            • KenC
                              King of Kegstands
                              • Oct 2003
                              • 14396

                              #15
                              I don't think your clutch is lined up right. You used the e30 alignment tool right?

                              Did I read correctly that you lowered the supporting jack with no bolts in the tranny? I bet you torqued the clutch disc out of alignment..

                              I've taken my 240 out about ten times. It should just slide right in. Put a little grease on the input shaft.
                              Originally posted by Gruelius
                              and i do not know what bugg brakes are.

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