Question about 1994 Pontiac Bonneville
No movement in any gear: pump failure, or total loss of fluid.
R&R, or refill pan and find the leak. If out of fluid, avoid running
the engine until the trans is refilled 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 faulty.
The other issues also would be a bad boost valve and will need to be replaced. Inspect your transmission fluid and see what condition it's in and if you have a front pump issue.
Thank you for using fixya and good luck.
Posted on Aug 24, 2010
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Posted on Jan 02, 2017
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