What rear end do I have? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Shadetreemechanic · 02-24-2007, 11:16 PM

Hi there I am wanting to put a limited slip rear end on my 67. I need to know what the gear ratio is that I have. Is there an easy way of findining what they are?

Americanrider · 02-24-2007, 11:45 PM

Pop the cover, drain the old oil, count teeth, divide the numbers. I have seen 3.52's 3.73's in half tons. The 3/4 tons got mostly 4.10 & 4.56's

Shadetreemechanic · 02-25-2007, 01:03 AM

Thanks for the info .

cableguy0 · 02-25-2007, 01:12 AM

if its a stock 1/2 ton with an original v8 chances are it has 3.07 gears. the most accurate way to find out for sure is to pop the cover and count the gear teeth. also the ratio is stamped into the ring gear it will be two numbers ie 14 42 etc just divide the big one by the small one and you have your ratio

GREASEMONKEY72 · 02-25-2007, 01:41 AM

just look for the numbers stamped on the outside of the ring gear, alot easier then countin

sameyrasmea72 · 02-25-2007, 02:05 AM

On the rear end itself there is a date code and usually 3 letters like RHL stamped on the "tube" of the rear end. On a 72 the stamp is about where the arrow indicates in the pic, but on different years in may be in a different location. If you can tell me the year of you truck and what these 3 letters are I can look it up for you.

02-24-2007, 11:16 PM	#1
Shadetreemechanic Registered User Join Date: Feb 2007 Location: Port Angeles WA Posts: 7	What rear end do I have? Hi there I am wanting to put a limited slip rear end on my 67. I need to know what the gear ratio is that I have. Is there an easy way of findining what they are?

02-24-2007, 11:45 PM	#2
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Re: What rear end do I have? Pop the cover, drain the old oil, count teeth, divide the numbers. I have seen 3.52's 3.73's in half tons. The 3/4 tons got mostly 4.10 & 4.56's

02-25-2007, 01:03 AM	#3
Shadetreemechanic Registered User Join Date: Feb 2007 Location: Port Angeles WA Posts: 7	Re: What rear end do I have? Thanks for the info .

02-25-2007, 01:12 AM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: What rear end do I have? if its a stock 1/2 ton with an original v8 chances are it has 3.07 gears. the most accurate way to find out for sure is to pop the cover and count the gear teeth. also the ratio is stamped into the ring gear it will be two numbers ie 14 42 etc just divide the big one by the small one and you have your ratio __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-25-2007, 01:41 AM	#5
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: What rear end do I have? just look for the numbers stamped on the outside of the ring gear, alot easier then countin __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

02-25-2007, 02:05 AM	#6
sameyrasmea72 Senior Member Join Date: Aug 2003 Location: Lubbock, Texas Posts: 2,443	Re: What rear end do I have? On the rear end itself there is a date code and usually 3 letters like RHL stamped on the "tube" of the rear end. On a 72 the stamp is about where the arrow indicates in the pic, but on different years in may be in a different location. If you can tell me the year of you truck and what these 3 letters are I can look it up for you. Attached Images __________________ 72 Cheyenne Super 80 Silverado Blazer 2wd



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.