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**john** · 06-06-2009, 04:20 PM

The "tandem lock" and "overspeed" guage came out of a larger truck with three axles. The tandem locked the front and rear difffs together for more traction, and the overspeed refers to engine RPM's.

06-06-2009, 04:20 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: OEM Fuel Gauge question The "tandem lock" and "overspeed" guage came out of a larger truck with three axles. The tandem locked the front and rear difffs together for more traction, and the overspeed refers to engine RPM's. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/