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Thread: Transmission and Overdrive Capacity

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    Luke Skywalker KVH's Avatar
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    Transmission and Overdrive Capacity

    I drained my transmission through the underside O/D plug, and now it will only take 1.5 quarts before fluid spills out of the filler hole. I can only conclude that I should've pulled the standard underside plug as well. The unit, transmission and overdrive, must retain lubricant when only one of the two plugs is removed. According to the manual, the correct capacity is slightly over 2 quarts, so I must have retained about .5 quarts. Does this sound correct? Thanks all.

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    Great Pumpkin TR3driver's Avatar
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    Re: Transmission and Overdrive Capacity

    Yup. I don't know exactly how much it holds, but there is definitely oil trapped in the gearbox. The passage between the two units is well above the bottom.

    If it's any consolation, the Ferguson tractor I'm working on has 3 drain plugs and they all have to be pulled. Then even after sitting overnight with all 3 plugs out, it dumped oil all over me when I removed the hydraulic pump. Two showers later, I've still got oil in my hair! And there is still quite a bit of oil, sludge and dirt visible inside.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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    Luke Skywalker
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    Re: Transmission and Overdrive Capacity

    I've never done it but I read somewhere about lifting the back and then the front of the car to level out the oil. Tom
    1960 TR3A TS73117 (under restoration year 6, owned since 1964)
    1959 TR3A TS58023 (in case I never finish the one above)
    1969 Triumph Herald 13/60 (a whim)
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    Jedi Hopeful Alfred E. Neuman's Avatar
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    Re: Transmission and Overdrive Capacity

    I was actually about to pull my TR4 into the shop on Saturday and change all the fluids. I've got a few liters of GL4 for the diff and trans/OD. I'm going to pull the trans drain and the OD plug so I can look at the filter screen.
    Is there any special procedure for refilling if you've drained both, or is the trans fill plug high enough that by the time oil is up to that level it's definitely flowed back into the OD?

    Thanks,
    Robby

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    Great Pumpkin TR3driver's Avatar
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    Re: Transmission and Overdrive Capacity

    Takes some time for the level to equalize, definitely longer than filling the main box. I generally just overfill a bit and call that good enough, but its best to let it sit level and check again after a few hours.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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    Senior Member Graham H's Avatar
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    Re: Transmission and Overdrive Capacity

    Or fire it up and let it run for a minute or two,that should get the oil every where it needs to go.

    Graham
    [SIGPIC][/SIGPIC]

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    Jedi Hopeful Alfred E. Neuman's Avatar
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    Re: Transmission and Overdrive Capacity

    Quote Originally Posted by Graham H View Post
    Or fire it up and let it run for a minute or two,that should get the oil every where it needs to go.

    Graham
    That's a good idea. That's actually the way we have to fill all the Mercedes 722.9 transmissions. Fill it up cold, hook the computer up to it and run it to a temp of 40 degrees C. When just a dribble comes out at 40 C, you're done.

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