64 c10 rear end question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shuvl · 04-28-2011, 10:15 AM

Found casting marks N 3838227 GM5. Cannot locate "N" on any of the tables found on internet. When I spin the tire the drive shaft spins just a hair over two times. My first question is what gearing do I have? It's a straight 6, 3 speed on the column and I have 17 inch wheels. At 65mph I'm at 3200 rpm. I'd like to increase my highway speeds and decrease my rpm's. Which gearing should I go with?
Posted via Mobile Device

04-28-2011, 10:15 AM	#1
shuvl Registered User Join Date: Apr 2011 Location: naples, fl Posts: 42	64 c10 rear end question Found casting marks N 3838227 GM5. Cannot locate "N" on any of the tables found on internet. When I spin the tire the drive shaft spins just a hair over two times. My first question is what gearing do I have? It's a straight 6, 3 speed on the column and I have 17 inch wheels. At 65mph I'm at 3200 rpm. I'd like to increase my highway speeds and decrease my rpm's. Which gearing should I go with? Posted via Mobile Device



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.