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Thread: Gearbox oil leak

  1. #1
    Join Date
    Apr 2010
    Location
    Rochester, NY
    Posts
    420

    Default Gearbox oil leak

    I cant pinpoint where this leak is coming from..
    Ever since I changed my gearbox oil I am getting a leak that looks like its dripping down the side of the case...

    I did not overfill it, and even removed the fill plug to double check.
    1971 SIIa 88" NAS Dauntles V6
    1974 SIII 109" RHD

  2. #2
    Join Date
    Oct 2006
    Location
    Guilderland,NY
    Posts
    484

    Default

    Quote Originally Posted by rejeep View Post
    I cant pinpoint where this leak is coming from..
    Ever since I changed my gearbox oil I am getting a leak that looks like its dripping down the side of the case...

    I did not overfill it, and even removed the fill plug to double check.
    Odds are it is coming from the vent hole on top of the gearbox. Leaks a bit especially after a fill and in hot weather.
    The Goat, 2.8 Daihatsu Td, '73 coil conversion

  3. #3
    Join Date
    Apr 2010
    Location
    Rochester, NY
    Posts
    420

    Default

    should I check for blockage or it will just weep for a bit?
    1971 SIIa 88" NAS Dauntles V6
    1974 SIII 109" RHD

  4. #4
    Join Date
    Oct 2006
    Location
    Guilderland,NY
    Posts
    484

    Default

    It's just going to weep. Some folk have gone to great lengths with extended breathers etc. but I just let it rustproof my crossmember.
    The Goat, 2.8 Daihatsu Td, '73 coil conversion

  5. #5
    Join Date
    Feb 2007
    Location
    East Granby, CT
    Posts
    1,883

    Default

    Other usual suspects are the selector shaft seals and the seals for the shifter detent springs. Both of these will leak down the side of the gearbox.

  6. #6
    Join Date
    Apr 2010
    Location
    Rochester, NY
    Posts
    420

    Talking

    Quote Originally Posted by jac04 View Post
    Other usual suspects are the selector shaft seals and the seals for the shifter detent springs. Both of these will leak down the side of the gearbox.

    can you explain a bit more..
    the selector shaft seals I can picture.. Im at a loss as to the detent springs?

    sorry noob
    1971 SIIa 88" NAS Dauntles V6
    1974 SIII 109" RHD

  7. #7
    Join Date
    Apr 2008
    Location
    The Granite State (NH)
    Posts
    3,435

    Default

    Quote Originally Posted by rejeep View Post
    can you explain a bit more..
    the selector shaft seals I can picture.. Im at a loss as to the detent springs?

    A=Selector shafts/seals
    B=Detent ball seals


    With transmission top cover on:





    With Transmission top cover off. Note that the detent balls are there, but the springs and seals are removed. The detent seals are the same setup as the selector seals and fit in the groove on the edge of the transmission:
    --Mark

    1973 SIII 109 RHD 2.5NA Diesel

    0-54mph in just under 11.5 minutes
    (9.7 minutes now that she's a 3-door).

  8. #8

    Default

    A non-leaky Land Rover gearbox, tells you that there is no oil in the gearbox, and it is now time to refill, once again.

    Remember that a Land Rover does not drip oil, it marks its territory.

    Leaky engine and gearbox, also called sling greasing, is a concept invented by the English to prevent rust in the undercarriage and works as you drive, it took them years to develop.


    Sorry I couldn't help it. To be honest, It's a very rare sight to see a non-leaky Series Land Rover gearbox or engine, and if it doesn't it's usually only for at short time, after you spent hours changing the oil seals, I do know a guy who brags about his Land Rover doesn't leak, but he doesn't drive it either.

  9. #9
    Join Date
    Apr 2010
    Location
    Rochester, NY
    Posts
    420

    Default

    SAFEAIR...
    thanks for the post... that will really help..
    I did the rear output seal today and rebuilt the handbrake since there wasnt much left of it anyway.. pars of the adjuster were broken and sitting at the bottom of the drum..

    I think I will go after the shaft and detent seals next week..
    1971 SIIa 88" NAS Dauntles V6
    1974 SIII 109" RHD

  10. #10
    Join Date
    Nov 2006
    Location
    Mass.
    Posts
    1,795

    Default

    I came to grips with the fact that these things are going to leak somewhere, hence my screen name....
    You can either spend time chasing your tail or just have fun and drive the thing.

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