Gear Ratio and Carrier - The 1947 - Present Chevrolet & GMC Truck Message Board Network

smoky02 · 04-22-2009, 03:03 PM

I am about to start upgrading a few things on my truck. I thought maybe a few people on here would be able to give me some advice as to whether I should go with a 4:10 or 3:73 gears. I am running 700R4 and don't usually do a lot of top end driving, most of the time she stays around 40 or 50, but on occasion I do drive to bama or take the truck on road trips. At 80 MPH I'm doing 2,000 RPM's. Also my rear end came out of a 71 or 72 (or so I was told) how do I find out if it's a series 3 or series 4 housing?

04-22-2009, 03:03 PM	#1
smoky02 Registered User Join Date: Oct 2003 Location: Sunny, Florida, some might call it South Alabama Posts: 834	Gear Ratio and Carrier I am about to start upgrading a few things on my truck. I thought maybe a few people on here would be able to give me some advice as to whether I should go with a 4:10 or 3:73 gears. I am running 700R4 and don't usually do a lot of top end driving, most of the time she stays around 40 or 50, but on occasion I do drive to bama or take the truck on road trips. At 80 MPH I'm doing 2,000 RPM's. Also my rear end came out of a 71 or 72 (or so I was told) how do I find out if it's a series 3 or series 4 housing? __________________ Just sold my C10...sad day... Looking for a 1972 Blazer to hopefully fill the hole in my heart.

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