Lost reverse, need help finding it. 727

Mopower71 said
Thanks, leads me to believe, its the converter more than anything. Fluid is clean. Filter was tight.
Should I be able to push up the piece that the spring sits against by hand for the reverse servo?
The spring above it is weak enough that I can probably get the clip off without compressing it with a tool to squeeze it.

That spring isn't all that strong so I'd strong I'd expect you could push it up by hand. I'd air pressure test the servo itself before I disassembled it. If it air tests good with 35-50 psi of pressure that tells you it's fine. If you need a air pressure test chart here it is