Re: 39 Packard OD solenoid

Posted by HH56 On 2022/3/23 23:01:06

Ross has provided a good explanation in post 25 on how it is engaged using purely mechanical means by the centrifugal clutch or as Ross calls it, flyweights. When the calibrated speed is reached, the weights move outward enough and via their linkage, trigger mechanical components which lock the sun gear and place the unit in OD when you let off on the accelerator for a moment.

When you want to forcibly come out of OD the kickdown switch activates the relay and solenoid which apparently pulls the pawl out of the sun gear and you are back in conventional drive. That is the only purpose of the solenoid.

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