Question about Pontiac Firebird

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I have a 1994 firebird with a 3.4L automatic. it was fine, then i took off in first, and at about 10 miles per hour, it locked up for a second. I couldnt get out of first. I checked the fluid, and it was foamy, and extra full, but when it cooled, it was fine. Id does smell funny though. What do you think the problem is ?

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  • kerrybrentdu May 09, 2010

    thanks for your help !

  • kerrybrentdu May 09, 2010

    I pulled the pan, and The filter was very dirty, and lots of metal flakes in it, and a few big flakes. The filter was intact, and not cracked. what do you think ?

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  • Pontiac Master
  • 3,854 Answers

Your transmission filter may have dropped causing your transmission fluid to foam up, or your front pump is failing. Avoid running the engine until a new trans filter is reinstalled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.
Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace.
Here is a link for you to retrieve your DTC codes to help you find out if there are more issues that is causing your transmission to do what it's doing. In the mean time, start with the simple and have a transmission shop service the transmission by replacing the filter and transmission oil. Have them check your transmission line pressure and replace the boost valve ($35.00 part) if it's low on line pressure.
Thank you for using fixya and keep me posted. Be glad to help you get your car running 100% again soon.
http://www.troublecodes.net/GM/

Posted on May 09, 2010

  • Harvey N Tawatao
    Harvey N Tawatao May 10, 2010

    Chances are that your front pump has a few broken vanes and will need to be replaced and also your Torque Converter if there is any metal flakes that worked it's way there. But it looks like the filter did it's job so replace the front pump for now and boost valve and good luck. Keep me posted.

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