I am going back to work on it today. I called Gilsingers this morning and found they had 19 oil filters in stock for the A. According to Don in the parts dept. these filters were used up through the 4020s. The 7 gallons(US gal) of 90w transmission looks to be a little expensive, I guess that is why it looked like I drained the original fluid last week. A quick check over at Rural King though shows a more reasonable price. Gotta run. I'll try to put something up tomorrow.