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Discussion Topic:
52 Ford Crestline. Transmission upkeep
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Usherbuilders |
07-14-2025 @ 6:13 PM
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Member
Posts: 3
Joined: Jul 2025
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I have a 52 Ford Crestline with manual transmission and overdrive. Overdrive is not operational yet. I’m trying to drain and replace the tranny fluid. Some specs say there is a separate drain plug for the overdrive and one for the transmission. I have found only one drain plug at bottom of transmisssiom and the two filler plugs, one for transmission and one for overdrive. My 52 Shop manual just shows main drain and no filler plugs at all in diagrams . After filling transmission until it overflowed, I tried to fill overdrive plug, but couldn’t get much of the GL 1 to go in, kept overflowing. Am I doing something wrongin the process. Is there only one drain plug on some models. ( solenoid for overdrive is not hooked up yet)
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carcrazy |
07-14-2025 @ 8:45 PM
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Senior
Posts: 1975
Joined: Oct 2009
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There should be a separate drain plug for the Overdrive unit but maybe it is missing on you car. The Borg-Warner Overdrive Manual recommends filling the overdrive unit first, replacing the plug, then filling the transmission with oil. If you fill the main transmission with oil first, oil will come out of the overdrive unit when you remove the filler plug. Don't worry, your unit will have enough oil in it if oil comes out of the main transmission fill plug. Fifth Avenue Internet Garage has an Overdrive Manual that you probably want to get to answer any questions you may have about your overdrive and its operation. https://www.fifthaveinternetgarage.com/technical_publications.php
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Usherbuilders |
07-15-2025 @ 7:45 AM
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Member
Posts: 3
Joined: Jul 2025
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Thanks for the input, I cleaned around every possible nut under the overdrive, but no drain plug. The solenoid is at the lowest point , but didn’t want to put that. I’ll check the Borg manual, just have my Ford Shop manual. Thanks again.
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40cpe |
07-15-2025 @ 8:03 AM
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Member
Posts: 488
Joined: Jan 2010
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There is a passage between the main transmission case and the OD section. The passage is small, so if you drain the main case the OD section will slowly drain. It has been a long time since I had a BW overdrive, but I THINK the OD Sun gear drum is just inside the OD fill hole making it hard to fill the OD section very fast.
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Usherbuilders |
07-16-2025 @ 6:42 PM
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Member
Posts: 3
Joined: Jul 2025
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That was my next question, when the overdrive drain plug is removed, pretty much the whole opening is blocked by something metal, like some kind of plate. That’s why the GL1 kept draining out of the fill hole. Do you think I should keep trying to somehow force it in, or just fill the main filler plug to the top and hope the gear lube makes its way in. Keep in mind my overdrive isn’t functioning as of yet. No power to solenoid connected. That’s a whole other project. No highway cruising, just the three gears and keeping her at 45/50mph max for now.
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40cpe |
07-17-2025 @ 7:55 AM
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Member
Posts: 488
Joined: Jan 2010
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Lubrication of the OD unit is imperative to its longevity. I don't know how much room you have to operate in the area of the fill port, but I would find a way to fill the OD section. I have used a small squirt bottle, like a mustard dispenser, for similar tasks.
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