Leaking tranny fluid
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Leaking tranny fluid in Past Cadillac Vehicle Discussion; I just came back from my road trip last night and when I went to leave for work this morning ...
  1. #1
    BLMDeville is offline Cadillac Owners Fanatic
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    Leaking tranny fluid

    I just came back from my road trip last night and when I went to leave for work this morning I noticed a puddle of tranny fluid under my car.

    I was wondering what I should look for when trying to find the leak.

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  3. #2
    dennis93coupe's Avatar
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    Re: Leaking tranny fluid

    The lines and or hoses going to the cooler. I hope you either didn't drive it or at least checked the level on the stick.

  4. #3
    BLMDeville is offline Cadillac Owners Fanatic
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    I foolishly drove to work I have some fluid in my trunk i'm going to add a little after work. Should I warm the car up check it add a little go for a ride and check it again?

    Also how much would you add from the bottom of the dip stick so I can get an idea of how much to add?

    Is it a quart like the oil?

    The thought of my tranny doing anything other than what it's supposed to do is quite terrifying.

  5. #4
    basscatt's Avatar
    basscatt is online now Cadillac Owners 10000+ Posts
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    Re: Leaking tranny fluid

    I have some fluid in my trunk i'm going to add a little after work
    do NOT add any trans fluid until you check the level -


    there is a transmission dipstick -

    to check the trans fluid level -

    the car needs to be on level ground -

    the engine needs to be be at normal operating temperature -

    the engine must be running -

    the transmission in PARK -

    pull the dipstick - and wipe it off -

    insert the dipstick - and pull it out - look at the level -

    if the fluid is LOW - at or below the ADD mark - add some trans fluid -
    the fluid is poured down the same tube the dipstick goes into -

  6. #5
    BLMDeville is offline Cadillac Owners Fanatic
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    Ok I checked the tranny fluid and it is at the same level as it was when I left to come home. So i'm more inclined to think it could be oil or power steering fluid. The puddle was close to the pully side of the motor. It's raining like crazy out today so i'm going to try to put cardboard under the car tonight like it says to do in the FSM to try to get a better idea of where it's coming from and exactly what kind of fluid it is.

  7. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Leaking tranny fluid

    If the oil drips are coming from the front side of the engine, slightly to your left when looking down on the radiator it's either engine oil from the filter, pressure sending unit, or oil filter adapter O-ring seals.

    If the drips are more toward the "belt end", radiator side or firewall side of the engine, that's P/S fluid.

  8. #7
    dennis93coupe's Avatar
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    Re: Leaking tranny fluid

    Sub, he has a 4.9 oil filter is towards the rear, usually runs down between the engine and trans. Pressure switch is next to the filter.

  9. #8
    BLMDeville is offline Cadillac Owners Fanatic
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    I just replaced the oil pressure switch neither the oil filter housing or the two oil cooler lines are leaking.

  10. #9
    bigm57ict's Avatar
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    Re: Leaking tranny fluid

    Sounds like PS fluid to me.
    Instead of cardboard, use white paper. This makes it easier to see the color.

    Black to dark brown - engine oil
    Red - trans fluid
    Clear - PS fluid (or brake fluid)
    Green or orange - coolant

  11. #10
    LeaderX11's Avatar
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    Re: Leaking tranny fluid

    I ws thinking that P\S uses the same type of fluid that used for transmission .....

  12. #11
    dennis93coupe's Avatar
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    Re: Leaking tranny fluid

    No, P/S uses P/S fluid. Should be clear, but can be brown. Very few people bother to change it or flush it out.

  13. #12
    onecool is offline Cadillac Owners Fanatic
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    I have seen power steering fluid come in red and I have seen people use transmission fluid as well in power steering units.

  14. #13
    bigm57ict's Avatar
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    Re: Leaking tranny fluid

    Ford did that for a while. I once had a '77 Mercury that used tranny fluid for the power steering.
    I don't know if they still do.

  15. #14
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    Re: Leaking tranny fluid

    Years ago trans fluid was used in the P/S pump. Not sure if that still holds true today.

  16. #15
    LeaderX11's Avatar
    LeaderX11 is offline Cadillac Owners Fanatic
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    Re: Leaking tranny fluid

    Wow, this makes me happy for a while ,,, I think that I the only one with GM vehicle who still uses trans fluid for steering !!!!
    oh well, I think now I got the reason for steering stiff in very low speed turning !!!

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