Hi all. Well - looking in the service book there IS a reverse-block
valve. I removed the trans pan and moved the manual selector and saw it
hit a pin. I poked the pin a few times with a screwdriver and it lowered
just a bit. Now the selector goes into all gears. I put new O-rings on
the shaft and cable mounts and ordered a new pan gasket. So I lucked
out - a relatively E-Z fix.
'58 Plymouth - "Christine", '59 DeSoto, '60 Imperial cnvt, '60 Fury
cnvt.