Dauphine Transmission Oil Capacity
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Thread: Dauphine Transmission Oil Capacity

  1. #1
    Fellow Frogger! geodon's Avatar
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    Default Dauphine Transmission Oil Capacity

    From my newly acquired Gordini glovebox handbook (one of the best I've seen incidentally) it states the capacity is 1.25 litres.

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    Now, when I filled it ages ago, I used the time honoured method of filling it till the oil ran out the filler hole at which point I screwed the plug back in. From memory, the amount of pumping I did would have delivered more than 1.25L

    Have I made a faux pas??

    I have a worrisome leak from the mating faces of the block & the transmission bell housing when it's standing still. There's a gasket there but surely the oil is not meant to be there?? Unless of course it's due to overfilling.

    I think I will remove the drain plugs & see what comes out





    **That's funny. When I delete the attachment then re-insert, I get a picture! curiouser & curiouser**
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  2. #2
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    The factory workshop manual says the same, you'll be pleased to know. It's worth finding one.

    Don't remove the drain plugs. Remove the level/filling plug and just recheck whether the oil level is too high or indeed a bit low....

    Is the leak engine oil or gearbox oil? There isn't a conventional crankshaft seal, but a nicely-machined thrower.

    Nor is there a bell housing. The transmission ends with a plate, a gasket on the differential side and the clutch thrust on the other side, acting on the clutch located inside the end of the engine casting.

    Unless assembled very well, these transmissions can leak a tiny bit at a few places. If it is really just the odd drip, I'd leave well alone. If it is an overnight puddle, well, better sort it out. Matter of judgement. There's a seal on the driveshaft that goes from the clutch into the gearbox - all apart to change that....

    Good luck.
    Last edited by JohnW; 29th March 2019 at 10:03 PM.
    JohnW

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  3. #3
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    Firstly ascertain what gearbox is in the car, it should be a 318 4-speed with a pressed steel clutch release fork, with just two plugs on the base (one in the steel gear set cover plate, and one under the diff in the alloy case). Earlier (rare in 4-speed) 'boxes had three plugs on the base - two drain plugs, and one level plug.

    There is also an lip-type oil seal for the input shaft in the gearbox cover plate that can leak if disturbed, so as already suggested work out what fluid is leaking. Oh, and it is confirmed the capacity is 1.25 litres.
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    Fellow Frogger! geodon's Avatar
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    Thanks John. It's def transmission oil; the smell gives it away!

    From memory, you can see into the transmission housing behind the input shaft hence my concern about overfilling.

    I'm aware of the seal on the motion input shaft, but, is the axis of the shaft actually below the oil level? I don't think it is.

    When running, I can imagine the oil being flung about and leaking if the seal is faulty. But not when stationary.
    "Pauses for audience applause......not a sausage!"....Bluebottle

    1949 Citroen Big 6
    1955 MGA1500
    1970 Peugeot 404 Utility (Resto project)
    1962 Renault Dauphine Gordini (Resto project)
    1950 Grey Fergie Tractor

  5. #5
    Too many posts! JohnW's Avatar
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    Simon's correct of course. Is the leak between the diff end plate and the alloy housing or on the clutch side of that plate? I expect on your car that the plate is steel.

    That lip seal for the driveshaft is well above the oil level. They last pretty well but I'd always change it if the engine is out for the clutch.

    How much is coming out per day? Is it only after a run or continuous?
    JohnW

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  6. #6
    Fellow Frogger! geodon's Avatar
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    It has 2 drain plugs & one filler. Yes to the pressed steel clutch fork. I remembered the one in it had been poorly welded up after it cracked causing the thrust bearing to wear out at a weird angle. I replaced it with a spare that came with the car

    It sat on my trailer in a shed for 2 months waiting for a call to go to the body shop. Constant slow drip. I tightened all the bell housing bolts. No effect. The puddle on the trailer was nearly half a metre wide! The stain is still there!! When it stopped I assumed it had reached the same stage as a non leaky old Jaguar i.e. the oil had run out.

    Today got even curiouser; I drained it & measured what came out as 1300cc!

    So! I measured 1300cc of fresh oil (allowing ~50cc to remain in the pipe & in the bottle) & pumped it in. As I got to the end, the filler hole started to drip.

    I wonder if during the 1st fill I was a bit slow realising it was full, kept pumping & DID overfill it somewhat. I most likely would have had jacked up on the filler side which would have raised the filler higher than if level and was pumping from a 5L container. What are the consequences?

    I've left clean paper under it so I'll know in the morning if it leaks.
    Last edited by geodon; 30th March 2019 at 04:21 PM.
    JohnW and driven like this.
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    1955 MGA1500
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  7. #7
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    Great mystery. Keep the story going
    Do you just pour the oil back in

  8. #8
    Fellow Frogger! geodon's Avatar
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    Not a friggin drop leaked!

    My theory: there's a defect in the paper gasket twixt the block & the bell housing ( that I'm ashamed to say I made!) but it's above the oil level with 1.25 litres so it only leaks when over filled.

    The next step is to jack it up high on the filler side & pump in another 250cc or so & see what happens.
    Last edited by geodon; 31st March 2019 at 11:49 AM.
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    "Pauses for audience applause......not a sausage!"....Bluebottle

    1949 Citroen Big 6
    1955 MGA1500
    1970 Peugeot 404 Utility (Resto project)
    1962 Renault Dauphine Gordini (Resto project)
    1950 Grey Fergie Tractor

  9. #9
    Fellow Frogger! geodon's Avatar
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    As I suspected, it IS possible to overfill if the car is jacked up on the filler side.

    I put another 300cc in before the filler overflowed.

    Now to wait.

    Watch this space!!
    "Pauses for audience applause......not a sausage!"....Bluebottle

    1949 Citroen Big 6
    1955 MGA1500
    1970 Peugeot 404 Utility (Resto project)
    1962 Renault Dauphine Gordini (Resto project)
    1950 Grey Fergie Tractor

  10. #10
    Fellow Frogger! geodon's Avatar
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    IMG_2383.JPG

    It appears my theory is correct.

    The leak is not as severe as before but still.

    The question is what to do about it!

    At this stage, I'll remove the excess oil & drive it for a bit once finished all the time monitoring the oil level.

    If the oil remains in there I can wait till the power plant comes out for another reason before replacing the gasket.

    So! If you have removed & re-attached the transmission, it is wise to fill it with oil before it goes back in.

    Here endeth the lesson!
    "Pauses for audience applause......not a sausage!"....Bluebottle

    1949 Citroen Big 6
    1955 MGA1500
    1970 Peugeot 404 Utility (Resto project)
    1962 Renault Dauphine Gordini (Resto project)
    1950 Grey Fergie Tractor

  11. #11
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    Quote Originally Posted by geodon View Post
    As I suspected, it IS possible to overfill if the car is jacked up on the filler side. I put another 300cc in before the filler overflowed. Now to wait. Watch this space!!
    But of course....
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
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  12. #12
    Too many posts! JohnW's Avatar
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    A little bit of oil goes a long way. The leak might well be trivial enough to leave, despite being totally irritating! Put a teaspoonful of dark oil on a newspaper and wait 12 hours....

    You might be just fine.
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

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