1955 Ford overdrive

[55vic]

I am a new member to the forum.
I've recently purchased a '55 Ford with 3 speed manual and overdrive.
Can anyone tell me the correct proceedure for using the overdrive? e.g. Do I de-clutch to engage/disengage? What speeds are recommended for the o/d use? etc

[takid455]

works on switch mounted under dash IIRC. that activates the solenoid on the back of the trans. Believe it disengages when the brakes are engaged. Have one on the shelf I picked up for a 56 F250.