Daytona transmission rear seal removal | FerrariChat

Daytona transmission rear seal removal

Discussion in 'Vintage (thru 365 GTC4)' started by loudvette, Mar 3, 2025.

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  1. loudvette

    loudvette Karting

    Sep 28, 2004
    222
    Illinois
    Full Name:
    David
    Hi all,

    Looking for a little advice, pulled the trans out of my Daytona, and the rear seal is leaking profusely.

    Anyway, to change this rear seal without splitting the case?
    Image Unavailable, Please Login And if I have to split the rear of the case, how does one go about that. Anybody have done this any advice would be greatly recommended
    Image Unavailable, Please Login
     
  2. turbo-joe

    turbo-joe F1 Veteran

    Apr 6, 2008
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    romano schwabel
    I think you mean the front seal? there is no rear seal, only the 2 for the shafts at the rear
     
  3. loudvette

    loudvette Karting

    Sep 28, 2004
    222
    Illinois
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    David
    Yes the front yoke seal for the driveshaft.
     
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  4. TTR

    TTR F1 Veteran
    Rossa Subscribed

    Mar 29, 2007
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    Timo
    While you can probably replace the seal without removing the front housing, but what about any and all other gaskets, seals, etc, ...

    ... you know, "while-you-have-it-out" or in other words, "how lucky do you feel ?".

    When was the last time all that was serviced ?
     
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  5. loudvette

    loudvette Karting

    Sep 28, 2004
    222
    Illinois
    Full Name:
    David
    Rest are good, did them few years back, just the pinion seal...

    So anyone do this job? Does it press in from the front? Do I have to split the front of the case?
     
  6. TTR

    TTR F1 Veteran
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    Mar 29, 2007
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    I've done it, more than once, but usually after removal of front housing and/or disassembly and/or full overhaul.
    Please re-read the first part of my previous comment.
    YMMV.
     
  7. swift53

    swift53 F1 Veteran
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    If you have done it a few years back, you don't know how the seal is done? hmmm.
    Best of luck, again....
     
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  8. John Vardanian

    John Vardanian F1 Rookie

    Jul 1, 2004
    3,077
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    John Vardanian
    Speedisleeve is also a great product.
     
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  9. TTR

    TTR F1 Veteran
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    Mar 29, 2007
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    While I wouldn’t go as far as call them “great”, they do provide reasonably easy & good band-aid* solutions in some applications, but not necessarily in OPs or the way he’s attempting to resolve** it.

    * That’s what they were invented for and yes, I’ve used them.

    ** From the appearance of the transaxle in the photos and somewhat vague reference to when or how extensively it was last time overhauled/rebuilt, I’d be surprised if replacement of input shaft seal is only thing it needs or should be serviced for, but not my car or job. Just shared “little advice” as requested, that’s all.
     
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  10. jimmyr

    jimmyr Formula Junior

    Oct 10, 2004
    340
    Scottsdale, AZ
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    Jim
    John, what is the purpose of Speedisleeve? For damaged seal surfaces?
     
  11. swift53

    swift53 F1 Veteran
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    Yes Jim, they cover up the groove made the force of the spring in the seal. Not the best practice, but for a Ford / Chevy pickup, a great solution.
    On a Daytona? Not really, as it is a touch demeaning in general.

    Regards, Alberto
     
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  12. DWR46

    DWR46 Formula 3
    Honorary

    Jun 19, 2012
    2,026
    We have used speedisleeve's on Ferrari's very successfully in the past. A speedisleeve and the correct matching seal and things are like new again.
     
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  13. John Vardanian

    John Vardanian F1 Rookie

    Jul 1, 2004
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    John Vardanian
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  14. jimmyr

    jimmyr Formula Junior

    Oct 10, 2004
    340
    Scottsdale, AZ
    Full Name:
    Jim
    John, Dyke, thanks for the feedback and we will see if the shaft is grooved and in need of this.
     
  15. TTR

    TTR F1 Veteran
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    On some applications, this ^ is or can be a crucial difference for a successful result.
    I've seen failures possibly(?) caused by OEM size seals having been used with larger OD created by Speedi-Sleeve (or similar products), forcing the lip (of the seal) to a not ideal angle/position.
    YMMV.
     
  16. swift53

    swift53 F1 Veteran
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    Once again, speedy sleeves are good, and the corresponding seal, idem if it is made for that few 'thou oversize.

    I have used them on 'common' not high requisite autos, but on 'high performance' situations, I would never.
    And yes, in a bind, they'll get you out of trouble just like JB Weld will. Strictly agricultural.

    Regards, Alberto
     
  17. loudvette

    loudvette Karting

    Sep 28, 2004
    222
    Illinois
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    David
    Few years back, I did the case seals. Not the pinion.
     
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  18. jimmyr

    jimmyr Formula Junior

    Oct 10, 2004
    340
    Scottsdale, AZ
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    Jim
    Front seal was easily replaced and the leak fixed. Mobil 1 trans oil used and the shifting was greatly improved!
     
  19. PDB

    PDB Formula Junior

    Feb 1, 2011
    602
    Leicestershire, UK
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    Paul
    The front cover comes off easily enough and the seal should be easily accessible.

    Paul
     
  20. jimmyr

    jimmyr Formula Junior

    Oct 10, 2004
    340
    Scottsdale, AZ
    Full Name:
    Jim
    Did not have to remove the front cover just pulled the seal out from the front and installed a new one. BTW, got the seal from GT Car Parts in Phoenix that had them in stock.
     
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  21. TTR

    TTR F1 Veteran
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    So, was this done by "loudvette" in Illinois or you in Arizona ?
    Just curious.
    Regardless, good to know it can be done without removing the front housing.
     

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