98 Mercury Mystique. The transmission shifts from 1st to 3rd and will not go into overdrive. This is the second transmission with exactly the same problem. I had a junkyard transmission put in the car 75 days ago. The newer transmission was working fine, shifting through all the gears till yesterday when this condition started while I was driving. There was no particular warning, although the car started stuttering several weeks ago. The stutter feels more like an engine problem and I don't think is related to the transmission. The Overdrive off light is flashing continuely since this started as well.

SOURCE: NO OVERDRIVE

I had a similar problem with my 98 mystique when i bought it used. I had no overdrive and was lucky to find a honest transmission shop that found the problem. In my case the overdrive was unplugged. They plugged it back in,cleared the computer and changed my tranny fluid and i was good to go. You should be revving about 2400rpm at 65mph. The other thing you can check is to make sure that the wires that go from the overdrive button are not broken off or coroded.

SOURCE: Transmission hesitates shifting into second and perhaps third gear when driving slow. When acceleration is positive transmission shifts smoothly. Reference "99 Mercury Transmission" as Subject when

Several things could be causing your problem:

1. Auto transmission fluid is low
2. Auto transmission fluid needs changing; this is an area that gets neglected by a lot of people;check the fluid and if its brown or gives off a burning smell, it needs changing. Very old transmission fluid will cause slipping in the transmission; if this is the case, it should be changed along with the filter

Marvin

• 85242 Answers
• Posted on Aug 14, 2009

SOURCE: truck starts and runs fine. Have 4 speed

do u have any trans related trouble codes? has the fluid been changed? this sounds like torque converter clutch chatter.

SOURCE: 1997 mercury mystique...4 cyl...O/D light flashes

could be overdrive switch,sensor,tcm

SOURCE: 1997 mercury sable won't shift into overdrive

first of all, check the kickdown cable to transmission. it may be out of adjustment. or just bad.if its the cable out of adjustment, it is sure cheaper then a tranny.