Hello,
Have gone back and read threads on o/d problems from the recent past and have seen jsweet's advice in particular.
Details: '92 240 wagon, 150k miles. Everything working fine but overdrive. (automatic for the record)
Replaced solenoid; rusted out and a mess. I have a good volvo only mechanic who said he never saw an overdrive *not* come back with a new solenoid. We also checked switch, relay, wiring, etc. and everything there is fine. Using o/d switch on/off , we can hear click inside, and solenoid clicking under car. So, at this point, we're assuming its not electrical. As a last resort before possible transmission replacement, mechanic suggests taking vehicle to a place that can do a "pressure flush" of transmission and then replace fluid.
Btw, the overdrive has come back maybe a half dozen times on the highway at around 60-65 mph and car drove fine until I got off highway, stopped and re-accelerated at which point it went back to no o/d. Any thoughts?
Thanks!