I purchased a 1996 Thunderbird LX 4.6 Automatic almost a year ago, been changing new parts on it as I drive it daily. The O.D. button is on the floor mounted gear shift, and I am assumming the transmission is needing a filter/fluid change but my instincts is telling me either change out the transmission. As from stop position and drive it goes through 1st and 2nd then third the RPM's jump and there's no third gear and then goes to over drive, it's slipping in third gear.I just want to confirm my thought on this problem .. thank you

SOURCE: Intermittent Rough Idle in gear at stop

well it didn't hurt anything to put the new fluids in. Always good to keep up on those some of the time forgotten routine maintenance. The erratic idle could be caused by a number of things. A leaking intake manifold gasket is one but usually is a steady higher racing idle. Could be clogged injector/s, not sure if you have a throttle body which would house a single injector or a fuel rail which would house 4, one by each cylinder. The other possibilities are any of the sensors that feed the information needed to the brain/on board computer to control the air and fuel to the engine under all conditions for optimal performance, and the emission control system.
Trouble shooting comes with several options. Fortunately most vehicles since the start of the electronic fuel injection systems, that would be everything since the end of the carburetor, comes with some description of an on board diagnostic system for trouble shooting the sensors and such.You can purchase a diagnostic tool, and you will need to purchase a Haynes or Chiltons Manual for your year make and model which will tell you what all of the different codes mean. You can find these at any of the auto part chains such as Auto Zone, Discount Auto Parts, Pep Boys etc. Most of these stores will test your on board diagnostics with their tool free of charge. The Manual never hurts to have in your possession as it covers mostly everything from A to Z for mechanical and electrical repair and troubleshooting. Some vehicles have a way of giving you error msg's by a series of turning the ignition key on and off a certain number of times, and giving a code by a series of an in dash light blinking and pausing, this would also be covered in the manual for your make and model.
Hope this helps,
Matt

SOURCE: 98 Civic Auto Trans Slippage

you need to replace clutch pack for that gear can be ordered seperately from parts store or dealer if you want to save money call peach street auto recycling at 1800-365-2341 for a warrantied used one! also might be time for change trans filter and fluid filter could be slightly clogged but I lean towards clutch pack I replace these alot on Hondas

SOURCE: transmission wont shift

check the kickdown/throttle valve cable. It may be bound up and stuck in the maximum position giving you extremely late shifts.

There ISN"T any modulators or vac lines on any Chrysler automatics

Ramy de Jesus

• 377 Answers
• Posted on Jun 08, 2009

SOURCE: Transmission problem in E230 Benz

What you need to check is the transmission release bearing because if there is a clearance on the release bearing you will encounter this problem and also check the transmission oil.

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Romy Kettlewell

• 154 Answers
• Posted on Aug 03, 2009

SOURCE: 1997 Mazda protege LX 1.5 automatic transmission

You are going to need a transmission shop. Mazdas do not always throw codes. You have an early OBD transmission, which do not send out many codes.