My 940 wagon NA with the AW7XL (not sure but assume it is an AW70L) has me a bit stymied about its gas mileage. I have done zero troubleshooting as it is darned cold out here and I am lazy (suspect FPR and a lazy O2)...plus home improvement projects have consumed way too my of my time.

The first acts on getting the car was basic tune-up stuff including a tranny flush. The fluid was dark but not burnt and no signs of coolant contamination. It still shifts relatively hard and the shifts are too easily controlled by the gas pedal even at light throttle settings. I assume there is something going on with the kickdown cable but it does have sufficient slack.

Sooooo, after all that, I am not 100% sure how to tell if the lock-up is locking up as needed. When I am doing 50 on a dead level street I see about 200 rpm drop. Slightest whiff of a breeze or a .00002% incline and it pops back up 200 rpm. Most of the time I can only get it to "engage" with cruise on. Is this normal? Have not taken an extended highway trip with the car yet and not 100% sure what I should see given the 4.10 rear end that is geared so much lower than my 1990 240 DL with the AW70.