Columbia Two-Speed Axle

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Who are the Columbia axle  experts? This is supposedly from an Auburn V12, but was adapted many decades ago to fit a 1932 Franklin. The spring perches, and shock mounts have been moved to fit the Franklin. It has Franklin brakes.  I plan to reinstall it into my 1932 Franklin. It had been setup to shift manually using a lever on the floor. I crawled under an Auburn 12 at Hershey and saw a bunch of hoses connected to the axle and a switch on the dash to shift it. 
What are my options for a clean, reliable install into my Franklin?I would also like to find any info regarding servicing and maintenance on this.