Re: Continuing on the Overdrive
Posted by Jim Kavanagh On 2009/9/2 12:22:25
Partial Success!
Installed the Solenoid last night. Grounded the governor and the solenoid to engage the pawl. Once in I could feel resistance to pulling the solenoid, so I assumed this is properly engaged.
Hooked everything up and again grounded the solenoid to confirm no "machine gunning" or other unwanted noises.
A Short Test Drive:
At about 25MPH, the indicator light comes on and the OD engages upon releasing the pedal. Indicator light goes out and OD is operational!
Not quite there:
I still have the issue of the buzzing noise at the point at which the OD light comes on and until the OD shift is completed. It is very quite and really hard to tell if it is mechanical or electric. I am hoping it is electric. I noted two other issues: (1) I hear the OD disengage as I slow down, but I must be almost at a stop. Slowing down to even 5 MPH does not actuate the ground-out circuit. (2) generally I am in first when the OD engagement is indicated. One time while in second, upon reaching the engagement speed, the indicator light came on and backing the throttle DID NOT engage the OD and, of course, the light remained on. The shift did occur after a couple more attempts and all was good. This also occurred a few weeks ago, just before the OD died, but the shift would not complete at all. Does the shift generally take longer in second gear?
I assume the noise in am looking for can come from a few places: On achieving engagement speed, the points in the governor close, the actuating contacts in the relay close and terminal 4 gets power, which powers the pull in winding and the indicator light. I guess the governor points could be making poor contact, but I don't think I would hear a buzzing noise from that (?). Outside the car, the solenoid made no unusual noises, but I do wonder if restricting the travel of the plunger, which I think is what happens while the solenoid is pushing on the pawl being held by the balk ring, could cause this noise to come from the solenoid. However, it does NOT happen with the solenoid in place, the car stationary and the governor grounded. It seems like electrically this should be the same situation.
At the time the governor closes the circuit, the ground out contacts in the second relay open, which results in power to terminal 6. It is these contacts that I have previously noted were closed upon pulling the relay (no power to it at all). I am wondering if these points could be the source of the noise. If they do not open when required, would this ground-out terminal 6 and set up the machine gunning noise? Or, can these points themselves be somehow buzzing as they try to open but fail?
Is there a way to test these components (or by-pass them) while driving?
If the noise is not electrical, then only the mechanics is left. When the solenoid pushes on the pawl, and the pawl pushes on the balk ring, waiting for it to line up, what exactly does the balk ring ride on? Can this action force it to contact the Sun gear, so that I am hearing that contact and it is the source of the buzzing noise as the teeth engage the balk ring? That seems like the only mechanical possibility. Once the shift is made, there are no unusual noises and everything feels fine.
Installed the Solenoid last night. Grounded the governor and the solenoid to engage the pawl. Once in I could feel resistance to pulling the solenoid, so I assumed this is properly engaged.
Hooked everything up and again grounded the solenoid to confirm no "machine gunning" or other unwanted noises.
A Short Test Drive:
At about 25MPH, the indicator light comes on and the OD engages upon releasing the pedal. Indicator light goes out and OD is operational!
Not quite there:
I still have the issue of the buzzing noise at the point at which the OD light comes on and until the OD shift is completed. It is very quite and really hard to tell if it is mechanical or electric. I am hoping it is electric. I noted two other issues: (1) I hear the OD disengage as I slow down, but I must be almost at a stop. Slowing down to even 5 MPH does not actuate the ground-out circuit. (2) generally I am in first when the OD engagement is indicated. One time while in second, upon reaching the engagement speed, the indicator light came on and backing the throttle DID NOT engage the OD and, of course, the light remained on. The shift did occur after a couple more attempts and all was good. This also occurred a few weeks ago, just before the OD died, but the shift would not complete at all. Does the shift generally take longer in second gear?
I assume the noise in am looking for can come from a few places: On achieving engagement speed, the points in the governor close, the actuating contacts in the relay close and terminal 4 gets power, which powers the pull in winding and the indicator light. I guess the governor points could be making poor contact, but I don't think I would hear a buzzing noise from that (?). Outside the car, the solenoid made no unusual noises, but I do wonder if restricting the travel of the plunger, which I think is what happens while the solenoid is pushing on the pawl being held by the balk ring, could cause this noise to come from the solenoid. However, it does NOT happen with the solenoid in place, the car stationary and the governor grounded. It seems like electrically this should be the same situation.
At the time the governor closes the circuit, the ground out contacts in the second relay open, which results in power to terminal 6. It is these contacts that I have previously noted were closed upon pulling the relay (no power to it at all). I am wondering if these points could be the source of the noise. If they do not open when required, would this ground-out terminal 6 and set up the machine gunning noise? Or, can these points themselves be somehow buzzing as they try to open but fail?
Is there a way to test these components (or by-pass them) while driving?
If the noise is not electrical, then only the mechanics is left. When the solenoid pushes on the pawl, and the pawl pushes on the balk ring, waiting for it to line up, what exactly does the balk ring ride on? Can this action force it to contact the Sun gear, so that I am hearing that contact and it is the source of the buzzing noise as the teeth engage the balk ring? That seems like the only mechanical possibility. Once the shift is made, there are no unusual noises and everything feels fine.
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