Question about 1995 Ford Thunderbird

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95 t-bird transmission shifting problem

Trans will not upshift to higher gears..works in low and reverse.. was a sudden occurance without any warning or abuse on vehicle ..so am suspecting some sensor or vacuum line or...?

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Use an obd 2 scanner and see if there are any codes. usually a shift control solonoid, but would verify this before changing. scanner can be plugged into receiver below the glove box.

Posted on Nov 28, 2008

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This sensor is used for shift points as well.

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http://www.2carpros.com/how_to/transmission_service_4.htm
Popular Problems Checks
1. Car will not go into gear:
  • Gear selector cable has failed
  • Brake lock solenoid has failed not allowing the gear selector to move out of "Park"
  • Excessively low transmission fluid (note: if car is operated for an extended amount of time with low fluid level the transmission will fail prematurely)
  • Shorted electrical component not allowing the PCM to control the transmission. Example: shorted fuse
  • Flex plate (flywheel) is broken completely not transferring engine power to the transmission.
2. Car goes into gear but then fades out of gear or is slipping while driving:
  • Transmission fluid is low
  • Transmission clutch discs or bands are worn out or burned
  • Faulty transmission shift solenoid.
3. Car goes into gear but does not shift out of first:
  • Blown fuse to the PCM controller
  • Faulty vehicle speed sensor (VSS)
  • Shorted second gear control solenoid
  • Faulty transmission controller (PCM)
Tips About Common Problems and Fixes

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