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12-17-2013, 07:30 PM | #1 |
Registered User
Join Date: Dec 2013
Location: Granbury Texas
Posts: 9
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Rear End Width Information?
Is there a source/sources for determining axle width: Wheel Mounting Surface (WMS) to WMS for Chevy/GMC vehicles?
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12-18-2013, 12:02 AM | #2 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
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Re: Rear End Width Information?
Outside Width Year Model
57.75 1962-1964 Chevy II/Nova 57.75 1965-1967 Chevy II/Nova 58.00 1978-1988 Chevy Malibu, Monte Carlo 59.50 1968-1982 Corvette 60.00 1955-1964 Chevy car 60.00 1967-1969 Camaro 60.25 1968-1979 Chevy II/Nova 60.50 1984-1995 Corvette 60.50 1964-1967 Chevelle 62.00 1955-1959 Chevy pickup 62.50 1968-1972 Chevelle 61.00 1970-1981 Camaro/Firebird |
12-18-2013, 12:05 AM | #3 |
Registered User
Join Date: Dec 2013
Location: Granbury Texas
Posts: 9
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Re: Rear End Width Information?
That's great! How about a 65 Chevy pick up?
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12-18-2013, 01:44 AM | #4 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Rear End Width Information?
I assume you are talking about the Eaton HO52/72 in a C20? If so it should be aprox 65.5" WMS to WMS. A '73 and up 10.5" FF 14 bolt is aprox 66.875" WMS to WMS.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
12-18-2013, 12:40 PM | #5 |
The 60-66 GMC/Pontiac guy....
Join Date: Oct 2010
Location: Apache Junction, Arizona
Posts: 1,306
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Re: Rear End Width Information?
Speaking 1/2 ton 2wd 12 bolt diff's.
How does someone identify what year diff that they are looking at? Stamp? Casting number? What are the year groupings? 60-62 housings are different than 63 and up... 63 ... the bastard child? 64-69 ? 70-81 ( I know this one as I have a new set of axles in the box) 81-88 ? Where can in find and confirm this info? Everywhere I look for info on the 12 bolts, all I find is car info which doesn't apply... Any help?
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Building Genuine Pontiac Firepowered cars and trucks for several decades. Why Pontiac?? That's just me daring to be different. Projects.. 63 C10 Short Wheel Base fleetside (The Pro-Street) currently under reconstruction. 440CID 2X4 Pontiac |
12-19-2013, 01:23 AM | #6 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Rear End Width Information?
The '60-'62 Chevy C10's had the Eaton HO32 and they measured 62" WMS to WMS. I do not know what the width is of the Dana 44 that came in the GMC's.
The truck 12 bolt first was available in the '63 model year, and had pressed on backing plates for that year only. The '63 and '64 12 bolts had 17 spline axels and corresponding spider gears. From '65 and up, the axles were 30 spline. The 12 bolts were 62" WMS to WMS from '63 thru mid year 1970 when they increased to 63.5". The width remained the same thru the last year of the 12 bolt in '82. The 8.5" 10 bolts which were used from 1979-80 thru '87 (thru '91 for the V and R series) were also 63.5" wide. I have never paid any attention to and casting number differences, I just measure them if I am unsure.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
12-19-2013, 11:49 AM | #7 | |
The 60-66 GMC/Pontiac guy....
Join Date: Oct 2010
Location: Apache Junction, Arizona
Posts: 1,306
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Re: Rear End Width Information?
Quote:
But now, because of your help, I can find the correct housing... Unfortunately I scrapped the old housing without measuring it
__________________
Building Genuine Pontiac Firepowered cars and trucks for several decades. Why Pontiac?? That's just me daring to be different. Projects.. 63 C10 Short Wheel Base fleetside (The Pro-Street) currently under reconstruction. 440CID 2X4 Pontiac |
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05-21-2019, 02:39 AM | #8 | |
Registered User
Join Date: Apr 2010
Location: Flagstaff, AZ
Posts: 974
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Re: Rear End Width Information?
Quote:
Here's a good rear end width list that I've frequented: https://www.google.com/amp/s/m.roadk...ican-cars/amp/ Nik
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'59 Apache - 383" SBC/TH-350 '68 GMC - BBC/TH400 |
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