The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

*LILRED66* · 03-06-2010, 02:47 AM

Welcome to the forums from Kansas City, KS and thanks for sharing. It appears the truck you are prospecting is a '65 according to the body badges, but a '65 is, virtually identical, to the '64 and '66.

Regarding the rear differential ratio, the only sure-fire way to determine is to remove the pumpkin cover, count the teeth on the ring gear, count the teeth on the pinion gear and divide the large number by the small number...the result is the rear-end gear ratio. Standard equipment in the '64-'66 Chevy 2wd, 1/2 ton trucks was 3.73:1, but no telling what has been done over the years.

03-06-2010, 02:47 AM	#2
LILRED66 Account Suspended Join Date: May 2005 Location: Kansas City, KS Posts: 3,906	Re: Going to look at this on Saturday Welcome to the forums from Kansas City, KS and thanks for sharing. It appears the truck you are prospecting is a '65 according to the body badges, but a '65 is, virtually identical, to the '64 and '66. Regarding the rear differential ratio, the only sure-fire way to determine is to remove the pumpkin cover, count the teeth on the ring gear, count the teeth on the pinion gear and divide the large number by the small number...the result is the rear-end gear ratio. Standard equipment in the '64-'66 Chevy 2wd, 1/2 ton trucks was 3.73:1, but no telling what has been done over the years.