need help with rear gear ratio - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Farm Boy · 12-27-2005, 11:27 PM

I have been trying to find where the rear gearing is stamped on the ring gear. Anyone have a picture of where to look. I counted the ring and there was 41 teeth. I also tried to count the other gear and it had either 10 0r 11 gears. So is this a 4:10 rear or am I missing something? One rotation of the ring gear seemed to turn the driveshaft about 4 times.

see ten · 12-27-2005, 11:43 PM

Divide the number of teeth on the ring gear by the number of teeth on the pinion and that is your ratio.

Longhorn Man · 12-28-2005, 12:29 AM

yes, you have a 4.10 gear.
Standard on a C/20 with a small block and automatic.

12-27-2005, 11:27 PM	#1
Farm Boy Registered User Join Date: Mar 2000 Location: Alder, MT 59710 Posts: 488	need help with rear gear ratio I have been trying to find where the rear gearing is stamped on the ring gear. Anyone have a picture of where to look. I counted the ring and there was 41 teeth. I also tried to count the other gear and it had either 10 0r 11 gears. So is this a 4:10 rear or am I missing something? One rotation of the ring gear seemed to turn the driveshaft about 4 times. __________________ WWS!!!!! 1971 Custom C/20 1992 Chevrolet Z71 1993 Jeep Grand Cherokee 1984 Chevrolet Celebrity (All old but long ago paid for)

12-27-2005, 11:43 PM	#2
see ten WTB this ad Join Date: Sep 2004 Location: Lafayette Georgia Posts: 5,074	Re: need help with rear gear ratio Divide the number of teeth on the ring gear by the number of teeth on the pinion and that is your ratio.

12-28-2005, 12:29 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: need help with rear gear ratio yes, you have a 4.10 gear. Standard on a C/20 with a small block and automatic.



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