Did not want to see this..Advice please | FerrariChat

Did not want to see this..Advice please

Discussion in 'Boxers/TR/M' started by OptimusPrime, Jul 5, 2019.

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  1. OptimusPrime

    OptimusPrime Formula Junior

    May 10, 2011
    284
    Florida
    Full Name:
    Tom
    My 88 TR has been running great. I went to change the gear lube today and aside from the normal microscopic fussy metal on the magnetic drain plugs, I found what looked like a needle bearing on the middle drain plug. I put a flexible magnet into the holes to see if there was anymore stuff but got nothing. The car has had the one piece differential put in and rebuilt in the past when the one piece blew. Question, anyone know what this? Thoughts? Since I was planning a belt service at the end of the summer, I may just leave the car without the fluids and take it in and have it looked at at the same time. AARRGGG!!!!! Image Unavailable, Please Login
     
  2. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    3,373
    Can’t help on the ID. Its a good call to open the trans & search during this summer’s belt service. Likely a low cost fix at this point in time. A royal PIA... but low cost. Sorry to see the hassle.

    PS - no more driving is a great plan for now
     
  3. xplodee

    xplodee Formula 3

    Jan 3, 2017
    1,101
    Allentown, PA
    Full Name:
    Tim
    I’m not following from your original post: you had a replacement one-piece differential blow in the past?
     
  4. OptimusPrime

    OptimusPrime Formula Junior

    May 10, 2011
    284
    Florida
    Full Name:
    Tom
    Thanks for the response, I meant to say I had the original two piece diff replaced with a one piece after it failed.
     
  5. ago car nut

    ago car nut F1 Veteran
    Silver Subscribed

    Aug 29, 2008
    5,246
    Madison Ohio
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    David A.
    Could it be one of the internal shift mechanism detent plungers?
     
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  6. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    3,373
  7. Newman

    Newman F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 26, 2001
    14,092
    Canada
    Full Name:
    Newman
    I thought shift interlock / lockout pins as well.
     
  8. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,038
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #8 Steve Magnusson, Jul 6, 2019
    Last edited: Jul 6, 2019
    Same here -- maybe the smaller "lockout" one 107454?
    Image Unavailable, Please Login

    The larger ones 103011 seem a lot fatter and with more spherical ends:
    Image Unavailable, Please Login

    OP - see Fig 30 on page E33 of the TR WSM. The OD of your mystery part doesn't look quite polished enough to be a bearing roller -- is the OD a little "pitted'?
     
  9. vincenzo

    vincenzo F1 Rookie

    Nov 2, 2003
    3,373
    A pin may be the more likely culprit. If a bearing was coming apart, it would likely be making an alarming noise by now.
     
  10. OptimusPrime

    OptimusPrime Formula Junior

    May 10, 2011
    284
    Florida
    Full Name:
    Tom
    You guys are great. That's it, the Lockout Pin #107454. Now I need to see if it fell out or was lost at last rebuild, replaced and now showed up. should I have had any issues with shifting? I have had no issues with any gears. Any thoughts on how it might have came out and how hard is it to check? I can do most anything except weld stainless..lol Image Unavailable, Please Login
     
  11. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,038
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    Don't see how it could ever physically fall out so I'd have to go with: 1) dropped during assembly and not noticed, or 2) dropped during assembly, couldn't find it, and replaced it with another one. Operationally, if it is missing, you've still got the spring-loaded detent balls sort of holding the shifting rods in place, but you wouldn't have the positive physical lockout from selecting two gear simultaneously.
     
  12. OptimusPrime

    OptimusPrime Formula Junior

    May 10, 2011
    284
    Florida
    Full Name:
    Tom
    Steve, Newman, and Vincenzo, thanks again. I looked up my receipts and in 1997 and 45 parts were replaced when the differential broke and no lockout pin. I assume they lost the pin and did not replace it or I would see a charge for it...they never miss billing for a part. The car has driven 23,000 miles since the rebuild. However, it will bug me if I don't put it back or check. If anyone has any pics of how that part goes back in, I would appreciate it. I see the drawings in the workshop manual but the devil is in the detail. I would also hate to take something apart and get it all out of alignment, break it, or cause a new problem. thanks again.
     
  13. ago car nut

    ago car nut F1 Veteran
    Silver Subscribed

    Aug 29, 2008
    5,246
    Madison Ohio
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    David A.
    I believe the pin is a lost extra? If shifting fine I wouldn't worry. The shifting rail detents can be worked on with engine in TR. Not fun, but can be done.
     
  14. 4redude

    4redude Formula Junior

    Jan 13, 2005
    726
    Fungus Corner
    Full Name:
    Brian Keegan
    107454 pin is 3.9 mm diameter by 11.4 OAL.
    103011 pin is 8mm diameter by 18.4 OAL.
     
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  15. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
    8,866
    southwest germany and thailand
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    romano schwabel
    what please means OAL?
     
  16. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,038
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    OAL = Over All Length (not just the length of the cylindrical portion)

    Thanks 4redude! More handwritten notes in my TR SPC! ;)
     
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  17. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
    8,866
    southwest germany and thailand
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    romano schwabel
    SPC ?
    special p.... c....
     
  18. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,038
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    SPC = Spare Parts Catalogue (it's printed on the front cover ;))
     
  19. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
    8,866
    southwest germany and thailand
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    romano schwabel
    ah ok, thank you
    I was confused because of the "handwritten" ;)
    in my SPC I never write something, only in my "special own made technical book"
     
  20. 4redude

    4redude Formula Junior

    Jan 13, 2005
    726
    Fungus Corner
    Full Name:
    Brian Keegan
    Steve, if you ever have any questions about sizes on hose clamps, o-rings, seals, bearings yada yada yada, I probably have the largest file of info like that.
     

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