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Discussion Topic:
12 volt conversion of 1951 Ford Overdrive
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Hrussell8750 |
01-14-2017 @ 8:23 AM
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Member
Posts: 31
Joined: Jun 2016
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Can anyone tell me what parts/switches etc. need to be changed when a 6 volt system has been changed to a 12 volt system. It was a positive ground before and ran fine. Change to 12 volt negative ground, now overdrive will not work. Thanks you for any help or diagrams.
Thank You, Harry Russell
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trjford8 |
01-15-2017 @ 7:18 AM
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Senior
Posts: 4232
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I don't know much about overdrives, but they do have a solenoid to operate them. If you have the six volt solenoid you probably have to find a 12 volt replacement. Also if you have an in-line fuse to the unit you might want to check the fuse to make sure it is not burned out.
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TomO |
01-15-2017 @ 7:48 AM
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You may have fried the overdrive relay and / or the solenoid. You will have to trouble shoot the electrical circuit for overdrive and replace the parts that were damaged as well as the ones that are for 6 volts only. I have no idea as to where you would find these parts.
Tom
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Hrussell8750 |
01-15-2017 @ 8:44 AM
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Posts: 31
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Thank you for the heads up I will check it out. It's a place to start .
Thank You, Harry Russell
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Hrussell8750 |
01-15-2017 @ 8:46 AM
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Posts: 31
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Thanks for the information, I'm having a hard time finding wire diagram for this 12 volt change over.
Thank You, Harry Russell
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carcrazy |
01-15-2017 @ 11:07 AM
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Senior
Posts: 1682
Joined: Oct 2009
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One overdrive parts source is Randy Rundle at Fifth Avenue Antique Auto Parts in Kansas. His website is: fifthaveinternetgarage.com He will have most, if not all, of the parts you will need. He is a friendly guy that knows a lot about overdrives.
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Drbrown |
01-17-2017 @ 6:12 AM
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Google for Borg-Warner Overdrives and download their design, repair and operation manuals. . Most overdrives copied BW designs. Lots of good info in them. The repair manual has a specific testing procedure for finding problems. Your overdrive must currently have a 6 volt relay. My 12 volt relay is mounted on the engine compartment firewall along with a 30 amp fuse. I recommend starting by changing the relay to a 12 volt. They are relatively inexpensive and available at most auto parts stores i.e. NAPA etc. Bosch brand are generally good. Keep the larger gauge wiring. The solenoids initially draw a lot of current. Also, be sure the casing of the OD is well-grounded to the body/frame.
This message was edited by Drbrown on 1-17-17 @ 6:57 PM
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Hrussell8750 |
01-21-2017 @ 9:07 AM
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Posts: 31
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Thank you I will give them a try.
Thank You, Harry Russell
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Drbrown |
01-21-2017 @ 9:50 PM
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Hrussell8750 .... PS .... if trying to find or download the Borg-Warner overdrive manuals, PM me and I'll email them to you as attachments.
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supereal |
01-22-2017 @ 12:28 PM
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Posts: 6819
Joined: Oct 2009
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In addition to the relay on the firewall and the governor, there are two sets inside the cap of the solenoid. One set allows the relay to pull. the other is a "holding" set that keeps the solenoid activated until the governor or the relay turns it off. I would suspect one or both points are burned, or the windings in the solenoid have opened with the doubling of the voltage. When you double the voltage from 6 to 12 the current in the solenoid is reduced by half, which may not be enough to pull it. The polarity change should't affect the operation.
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