Continuing "overdrive" issues bring me back to you. What's been done: new overdrive relay; throttle cable adjusted/cleaned/lubed; transmission oil replaced. Made a hopeful trip to new Volvo mechanic today who on the phone suggested (as have Brickboarders)a loose/dirty solenoid wire. After inspection, was told that power was going to the solenoid, so it MIGHT be a bad solenoid, and the only way to know was to REPLACE the solenoid and see if it works. Estimated price for this "guess": $312 for solenoid, total of $500-plus with labor. If that doesn't work? Start looking at transmission. Uggh. Not having $500 for a "maybe" fix (or any fix, actually), I called IPD about the $40 overdrive bypass kit. The IPD salesman thought my symptoms were odd, that overdrive either works or it doesn't, that there is no "wandering" between third and fourth gear with overdrive issues. My car does wander between third and fourth gear, as if trying to decide where to settle. Sometimes it is a smooth rocking motion, sometimes sharper -- in each case I steady the car by turning overdrive off using the shift button (orange arrow goes on), forcing it to stay in third gear. Sailing along in fourth gear at 65 mph, the minute the car starts downhill, it shifts immediately back to third gear on its own accord (when the car is controlling itself this way, the orange arrow does NOT come on)-- sometimes it hangs in third gear for the duration of the downhill descent, and sometimes it starts rocking between third and fourth, forcing me to use the shift button to hold it in third. Going along on smooth, straight road, it sometimes sets off with the slightest lifting off of the gas. Sometimes road bumps rock the brick. Sometimes there is NO obvious trigger at all. No big bucks for this fix, and I am committed to regular, 300 mile trips up and down the turnpike. These are not fun or gas efficient rides these days. Is the solenoid bypass worth a shot? Any thoughts on when an overdrive issue is really a transmission problem? Hoping for the benefit of more brilliant, miraculous, brickboard puzzle solving. Thanks. :-) 1992 240 Wagon (automatic) (104,182 miles)(Boston area)