"Instructions for Installation of Columbia Overdrive Axle on 1939 Lincoln-Zephyr V-12" This (3) manual is a reprint of the owner's manual for the 1933-48 Columbia Overdrive Axles. Inside you will find out how to shift and what the lubrication instructions are. You'll learn about the available comparative gear ratio and RPM. tables so that gear ratios can be adapted to your style of driving - for added economy or power.
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