Recently, I picked up a 1989 Volvo 245 with 250k on it. The automatic AW70 transmission seems to work OK . It hit's each gear with a little 'neck snap' when accelerating hard. I changed the trans fluid once with new gaskets and filter and installed IPD's overdrive by-pass plate for the sad looking original Volvo o.d. solenoid. So, that's one trans. fluid change. I drove the car for 40 miles or so then decided to change the kick-down cable since it was stretched and frayed. So, that is another trans. fluid change with filter and gaskets. I feel I adjusted the kick-down cable adequately. Although I never power flushed the AW70 , I still don't get the 4th gear or aka overdrive. What else could it be?