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

Longhorn Man · 02-28-2011, 12:35 AM

if it topped out at 55, then you have MAJOR problems. Even with the 4.56 gears, it should be good for over 100 MPH.
4.56 is what you should have if memory serves. It'll be either that or 4.10.

02-28-2011, 12:35 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Rear end gears for 72 c20 if it topped out at 55, then you have MAJOR problems. Even with the 4.56 gears, it should be good for over 100 MPH. 4.56 is what you should have if memory serves. It'll be either that or 4.10.