[zoegrant]

I had a similar situation with the overdrive in my 55. After a week of testing all the electrical parts of the overdrive system and finding that all were good I thought I would try a suggestion put forth from the B/W instruction manual.
in my case I felt that the solenoid plunger would not engage fully in the sun gear blocker ring/gear.
The instructions are fairly long for me to type out. So I will try to post here. hopefully it will work.