Re: Columbia two speed differentials
Look at the bottom of the differential center section and there may be numbers divide the one number by the other to find the original gear ratio. Depending upon where you live and drive the topography can help decide the gear ratio you want 4:11 or 3:78 is suggested. If you contact John Conelly at Columbia Two Speed (web site) you should be able to get a rebuilt Columbia that is already bullet proofed plus controls.
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