Not sure what year or size truck you're working on, but all 2-speed trucks from the factory would have a small 2-speed ratio adaptor inline with the speedometer cable. The vacuum shift axles had a vacuum shift adaptor and the electric axles had an electric adaptor. This keeps the odometer and speed indication accurate regardless of which range you're in.

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
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Silver Spring, MD