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jhbsdionboisfndinboid
you probably need a new or overhauled transmission friend!
Bad coil?
usually it is the overdrive solenoid, but can be the connector to it, input to the computer, or the computer.
Mercury.
I have a 1996 Mercury Sable and it did the same thing. The fix was a new transmission. My mechanic noticed that the car was running higher RPMs than it should have after replacing an engine that blew a rod through the engine because of the bad transmission.
It could be that you A/C is running low on fluid.
Thanks anyway, I had thought this was a driveline issue, but no! Silly me, the darn boat was dropping a couple cylinders due to ignition issues! Keadj
There is a push button on the end of your automatic shift lever. Pushing it in causes the Overdrive to turn on and off.
not downshifting.
your transmission is about done, sell it
mercury, mercury is the 80 th element on the periodic table.