I HAVE A 2001 EXPIDITION WHILE YOU ARE DRIVING THE TRANSMISSION WONT FIND OVERDRIVE IT ACT LIKE IT IS IN NEUTRAL BUT WHEN YOU TURN OVERDRIVE OFF RUNS FINE AND THE TRUCK WONT GO IN REVERSE WITH OVERDRIVE ON OR OFF

There are adjustments to be made on the outside linkage of your transmission. Take it to an honest transmission shop that won't tell you to replace the whole transmission.

Possibilities:

1. Transmission is low on fluid

2. Transmission oil filter plugged

3. Overdrive functional clutch is broken-transmission needs repair

The overdrive will only come into use when the transmission module reads the correct revs/ road speed ratio. Switch if off for heavy city traffic driving to improve economy when it moves up and down all the time. No it will not harm the transmission otherwise.

The infamous Exploder transmission. Try a tranny flush and new gasket. More likely it needs a new transmission.

It might be the electronic shift selonoide. Probally the overdrive one. They arent that hard to change but you need to find out which one is which when you take off the tranny pan assumeing your doing it yourself. The part acyually is not that much. First I would check the transmission fluid. It has to be checked while the transmission is warm, vehicle is running and in park on level surface. Sometimes Lucas transmission treatment can stop it too. Car quest has it for $12 a bottle.

Driving in overdrive should not destroy a transmission. Just keep an eye on the fluid level.

It sounds like your alternator might be starting to go bad and the Battery Light is coming on because it is not charging the battery correctly. Have your Alternator checked with a volt meter, it should be reading 13 to 14 volts if working correctly. If not, replace your alternator.

I found that the code is set for:

P1740....TCC Solenoid or Overdrive Solenoid performance

which indicates that a rather inexpensive fix is in order, not a complete transmission replacement!! The TCC is the solenoid which controls the locking of the transmission converter so that you get better gas mileage with no "slippage" while at highway speeds, which is normal when the converter is unlocked as you slow down. If it is locked and the solenoid fails to release it the car will stall when you come to a stop since the fluid in the converter fails to act as a clutch and the engine is connected directly to the transmission input shaft. If it never locks then the oil in the transmission will overheat at highway speeds since ther "slippage" will always be present in the converter cauasing frictional heating of the oil.

Whenever you get a quote from a shop ALWAYS get at least two more!!! No matter what the job is, even a muffler replacement get many quotes. Go to a reliable transmission repair shop and ask for their opinion. In my humble opinion the shop that told you that you need a new transmission is just hungry for work - stay away!!!!

Bob

why 2000 hyundai tiburon
overdrive sometimes not working