Wondering if anyone can point me in the right direction. 2.2L auto
235K. Been fine but after a few miles of city driving and then 10 miles hi-way, I exited and stopped. Apparently the tranny didn't downshift. Engine lugged down and car barely moved until reaching aound 30mph. Same thing next 2 stops. After sitting overnite, car ran fine altho I didn't drive it far. Used to work on cars before computers and still do easy stuff but understand these have 2 solenoids, 2 speed sensors, and, of course, the ECM. Anyone had this problem and have an idea where to start? Thanks for any suggestions. (Fluid changed about every 50K but screen not cleaned that I know of. Engine runs fine.)