Re: 200 ford explorer will not shift into overdrive,
My Mom had the same problem, and ended up needing her transmission totally rebuilt. Later she was told that when Fords do this they usually just need the transmission flushed and all the filters replaced which is a way cheaper alternative and a good thing to try before you shell out 2k for a total rebuild !!!
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it may be a bad transmission modulator valve located on the side of your transmission,vacum operated. a sudden downshift or forward shift when unexpected is sign of a bad modulator valve or a vacum leak to the transmission.best to shop around for a garage w/references when it comes to transmission work though. check all the vacum lines to your transmision,you need to look on the underneath side of your truck on the side of transmission for a loose or disconnected vacum line on the side of the transmission. when you feel the vacum line,follow it to the top of engine,the vacum line is about 3/8th line,and may be disconnected or losing air. to make this short,when you drive the car,start out in low gear and shift the transmission,manually from 1st to 2nd to 3rd does it do right with no slipping? if it does this right and shifts great manually,the modulator valve on the side of the transmissions bad,or a bad vacum leak in-between.thank you for choosing fixya.com
There is an electrical problem with the transmission. Stuck actuator or something. Get it checked, might be a $200-300 fix, that would cause a transmission failure down the road. It might even be the overdrive switch on the shifter.
This is an unfortunate repair for a qualified repair shop to diagnose, most of the time this condition is an indication of a transmission overhaul, computer or sensor defect, however let the professionals Aamco,or the like, take a look at it and give you an estimate of what they diagnose as the problem.
They can scan the computer as well to see if any codes exist relating to the no upshift condition and overdrive light.
Hope that helps.
I'm guessing you mean reverse, at a further guess you have no OD(overdrive). So you either need to rebuild, or replace the Transmission. Then again, maybe the shift mechanism is way out of adjustment, it could happen
Is this the light on the dash notifing you that you hit the button to turn the O.D. off that you're talking about? I have a 98 and my button is located in the end of the shift lever. I have hit it several times accidently and noticed the light in the dash coming on. All you have to do is push the button back in and your vehicle will once again be in O.D. which is where you want to be except when you are off roading it. Overdrive cuts your engine revolutions by 1/3 thus giving you better gas milage on the highway.
I hope this helps you and please don't forget to rate my advice.
Tum the overdrive switch on for good fuel
economy and smooth driving. If engine braking
is needed in the "D" range or if repeated
upshifting and downshifting between the 3rd
and 4th gear is needed when climbing a
gentle slope, it is recommended that the
overdrive switch be tumed off. Tum the
overdrive switch back on immediately afterward.
When the overdrive switch is tumed on, the
transaxle will automatically upshift to the second,
third and overdrive gears. When the overdrive
switch is tumed off, the transaxle will not
upshift to the overdrive gear. For normal driving,
the selector lever should be left in the "D"
position and the overdrive switch tumed on.
If you need to accelerate rapidly, press the
accelerator pedal all the way to the floor. The
transaxle will automatically shift to a lower gear,
depending on the vehicle speed and load.