Problem solved! Thanks to all the folks that replied offering advice and help. I decided to drop the pan and remove the valve body and clean it and go over all the adjustments stated in my shift kit instructions. With the valve body out of the transmission, I would also perform an air test on front and rear clutch, kickdown servo and low and reverse servo. Prior to removing the pan I came across a YouTube episode by #moonbuiltgarage who was experiencing the same problems with his A-904. Sure enough when I removed the valve body I could see I had the same issue. There is a tab on the manual lever assy. that was not engaging the manual valve due to too much verticle movement in the manual lever assy. I added an extra washer to the assembly to remove the slop. Tried the transmission and it appears to be working.
