I have a 98 ford expedition. The check engine light is on also between 50-55 MPH it jerks. If I speed up or slow down it shifts smooth and all is well. There are no noises associated with the **** and its not a hard **** but can feel it while driving. Any ideas on what could be wrong? Hoping its not a major fix. Thank you!

SOURCE: Ford Expedition 2000

I have the same problem. Low rpm a **** or a shudder, high rpm runs fine. Also, at slow acceleration it will cut out then suddenly get its power back. I am looking into it being the being the TPS sensor (Throttle Position Sensor). I think these things can get dead spots. If a check engine light comes on, and you have a misfire, have the code read, chances are you need to change the ignition coil pack. It is just a matter of knowing which cylinder is misfiring.

SOURCE: 2003 Expedition jerking/cutting out.

Had same problem: cutting out at low rpm, jerking, a huge clunk or shudder at higher speed (like transmission was going out), and rough idle. All these symptoms were intermittent.

CHECK THE FUEL FILTER!! Changed the fuel filter and thing runs fine!!

PS mine 2003 expedition has 105k

SOURCE: transmission downshifts hard when I let off the gas at slow speeds

Transmission sensor.your gear ratio was not set up properly..Its supposed to be mapped out soo the tranny shifts at a neutral rpm(around 2500-3400 rpm) its punching into gear correct?could have been a rebuilt tranny in which case they just replace the current problem..Or it could be a flywheel.1st thing to get done is to change the transmission fluid and filter.Goto midas or somewhere like they and they call it a flush and fill and it costs around $160 which is best case scenario.

SOURCE: speeds of 60 or above my car feels wobbly.sometimes my throttle cable (?) gets stuck so my car will be at a stop but the engine is still accelerating and lately it's sounds kind of like it puttering w

normally your engine should not cause your car to wobble, however a misfire can cause this to happen, as far as your throttle cable, you need to replace it and check the transmission kick down cable (co located with throttle cable) replace if necessary. The jerking when shifting is probably due to incorrectly adjusted kick down cable, when adjusted correctly the transmission with shift smooth. Hope this helps, let me know

SOURCE: 1997 Ford Taurus, Won't Shift Past 3rd Gear

The forward clutch control valve has a retaining clip that is known to break on these tranny's. This can prevent it from shifting into 4th gear. Good news, the part is five bucks. Bad news, it's in the valve body which takes a few hours to get to. I fixed mine in about 8 hours thanks to great step by step instuctions I found online. Search for "valve body removal taurus tranny". If it's not the retainer clip then it could be one of the solenoids on the valve body. I believe there's one just for 3rd and 4th gear. Good luck