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Old 04-29-2020, 09:48 AM   #6
rotorwrench
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Location: San Antonio, Texas
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Default Re: Flathead transmission

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Many of the old service or owner's manuals give the lube capacity in pounds. If you can put your finger in and bend the first knuckle to find oil then it is usually full enough. Filling it till it pours out is OK too. Manual transmissions tend to find there own level. If it's an overdrive transmission then the overdrive section also has to be accounted for but there is a small passage between the two on most of the Borg Warner OD designs. It just takes a while for the level to equalize.
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