Question about Pontiac Firebird
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.
Posted on May 09, 2010
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Posted on Jan 02, 2017
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