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Would a dirty transmission filter on a 1990 Cadillac sedan deville cause it not to shift out of low gear?
Wiki User
∙ 15y ago
It could but I dought it is that dirty. It would most likely slip. Old transmissions use to have a modulator valve that told it when to shift. Now its done electronically through the computer . Look closely for any wires going to the tranny and check them for loose connections,corrosion,etc Answer The modulator valve used in some transmissions is operated by vaccuum so a vaccuum leak may also be the culprit. Another possibility may be the TV (throttle valve) sticking, or being bent inside the transmission. Your transmission is electronically controlled and is either a 4t60E or 440 T4 (Cadillac was transitioning from the latter to the former during the 1990 model year. From what I understand the 440 t4 was more prone to TV cable problems due to a difference in design with the superior 4t60E.
Wiki User
∙ 15y ago
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