1951 Ford overdrive

[Emmit51]

The way I always check is to accelerate up to ~40 mph or so, and by this time will be in 3rd. Let up on the gas pedal, you should feel the car go into a higher gear (lower RPM, less acceleration response when you hit the gas) as long as the OD is not locked out. Then, if you kickdown by stomping on the pedal, you should feel the opposite when the car goes back to normal 3rd (lower gear: increased revs, increased acceleration response)