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1998 Buick Park Ave. 3800-4speed auto trans

This is a discussion on 1998 Buick Park Ave. 3800-4speed auto trans within the Automatic Transmission forums, part of the Drivetrain category; took my car to get the trans oil changed and the pump would not pump the oil through. it would ...

  1. #1
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    brown
    1998 buick PA

    1998 Buick Park Ave. 3800-4speed auto trans

    took my car to get the trans oil changed and the pump would not pump the oil through. it would pump out aprox.2 quarts then just stop.I took it to 3 different shops and the same thing. It seems to burn the trans oil faster than it should. black at 30000 miles
    I went to the local Buick dealer today and the service rep had not heard of this problem. same old song bring it in and we will check it out for a price. Doe's any one know or heard of this problem. I changed the oil myself by dropping the tranny pan. i blew the cooler lines out so they are not pluged
    Thanks in advance for any help.

  2. #2
    Member Fastcar's Avatar
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    Dark blue metallic
    2000 TransAm

    Dayam! Trans fluid black at only 30K miles? Your tranny's overheating the fluid big time - that's why it's deteriorating and turning black. I don't know if you have an external trans fluid cooler or if it's integrated with the radiator, but it definitely looks like the fluid is not getting all the way through the cooling system. The lines could be clear and unplugged, but the heat exchange coil/radiator could be plugged. And, did you ever change the trans filter? Is this with only normal driving? Do you ever tow anything?
    Last edited by Fastcar; 12-23-2006 at 06:52 AM. Reason: added towing questions

  3. #3
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    brown
    1998 buick PA

    Quote Originally Posted by Fastcar View Post
    Dayam! Trans fluid black at only 30K miles? Your tranny's overheating the fluid big time - that's why it's deteriorating and turning black. I don't know if you have an external trans fluid cooler or if it's integrated with the radiator, but it definitely looks like the fluid is not getting all the way through the cooling system. The lines could be clear and unplugged, but the heat exchange coil/radiator could be plugged. And, did you ever change the trans filter? Is this with only normal driving? Do you ever tow anything?
    Yes i have changed the filter twice in the last 3 years [Middle year just oil change] A lot of expressway driving From mi to fl twice a year. No towing.
    this last change it has not burn as bad still a little red been about 18 months since last change. It has 140000 and has been changed 4 times once at a dealer and three by me.

  4. #4
    Car and Truck Trans Tech
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    There are two fittings for the cooler lines. The one that points straight down has a check valve in it I believe. What happens is the plastic melts and restricts the cooler flow. With the black fluid it sounds like the trans is hurt. Vince

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