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Longhorn Man · 05-08-2008, 02:53 AM

your GMC is a 1/2 ton. 3.73 is the base gear ratio for all 3 speed manual shift 1/2 ton trucks if memory serves... 4.56 is the base gear ratio for all 3 speed manual shift trucks in 3/4 ton.

05-08-2008, 02:53 AM	#18
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Were GMC leaf springs an option? your GMC is a 1/2 ton. 3.73 is the base gear ratio for all 3 speed manual shift 1/2 ton trucks if memory serves... 4.56 is the base gear ratio for all 3 speed manual shift trucks in 3/4 ton.