just cleaned magnetic screen and changed trans filter and it will not move. 1973 977l--all linkages appear to be working and fluid level is ok? Thanks for any advice. when I pulled it in shop to do this was doing fine.
found problem-oring on magnetic screen housing was flattened----suckling air all is well now such a small thing to cause so much trouble.
Be glad you found the problem. Small things like that can sometimes take forever to figure what's wrong.