53 years young - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Chevy Fleetside** · 02-21-2018, 06:07 PM

4.11's are real. Maybe used in an automatic trucks (at least that is where I have seen them) otherwise 4.56's
There might be a tag on the rear diff and if not you have to look at the ring gear and there will be numbers stamped on it, or just count the ring gear teeth and pinion gear teeth and divide the two.

'65fleetSide · 02-21-2018, 06:13 PM

Quote:

Originally Posted by Chevy Fleetside

4.11's are real. Maybe used in an automatic trucks (at least that is where I have seen them) otherwise 4.56's
There might be a tag on the rear diff and if not you have to look at the ring gear and there will be numbers stamped on it, or just count the ring gear teeth and pinion gear teeth and divide the two.

Alright Ill do that thanks.

02-21-2018, 06:07 PM	#1
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,779	Re: 53 years young 4.11's are real. Maybe used in an automatic trucks (at least that is where I have seen them) otherwise 4.56's There might be a tag on the rear diff and if not you have to look at the ring gear and there will be numbers stamped on it, or just count the ring gear teeth and pinion gear teeth and divide the two. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

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