Transmissions and Drivetrains
Transmission Fluid
Chevy Silverado

What would cause your automatic Transmission Saab 900 SE convertible to not shift gears even if the transmission fluid levels are fine?



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I dont have an answer for you but, if your Saab has a modulator valve that may need to be replaced. I have an old Ford and I had to replace one around a month ago.The valve is supposed to tell the transmission the load of the engine so it can change.Another thing you will probably have to get your computer checked if it is a newer model.