The following pictures proves just how manual the manual valve is, there is NO electronics involved with moving the shifter inside the vehicle that pulls the cable that moves the shifter arm on the side of the trans, that moves the linkage on the inside that is directly indexed in the manual valve.

The switch on the outside of the transmission tells the computer what gear has been selected, it does not turn the shaft to the selected gear.








The forward drum can fail or loose forward engagement and still have a good pressure reading in the following ways

A: Burnt clutches
B: Broken snap ring groove
C: Clutch splines stripped out
D: Stripped clutch hub.