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Old 05-30-2012, 04:20 PM   #1
LowLifeS10
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GMC rear end wider than chevy's?

Hi

I read somewhere that GMC used wider rear ends than chevy did, is that true?
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Old 05-30-2012, 06:01 PM   #2
Tim Christian
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Re: GMC rear end wider than chevy's?

Not 67-72 for sure that I have ever came across.
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Old 05-30-2012, 06:59 PM   #3
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Re: GMC rear end wider than chevy's?

I don't believe that's true in any year. Gotta wonder why they ever would.
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Old 05-30-2012, 08:56 PM   #4
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Re: GMC rear end wider than chevy's?

71 and up rearends were 1 and 3/4 inches wider because of disc brakes on front
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Old 05-30-2012, 09:21 PM   #5
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Re: GMC rear end wider than chevy's?

...on Chevy and GMC.
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Old 05-31-2012, 05:47 AM   #6
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Re: GMC rear end wider than chevy's?

Ok, does anyone know how wide they are? (drums) And between what points do I measure?
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Old 05-31-2012, 06:38 AM   #7
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Re: GMC rear end wider than chevy's?

Quote:
Originally Posted by LowLifeS10 View Post
Ok, does anyone know how wide they are? (drums) And between what points do I measure?
What year truck rearend are you working with?
5-lug?
6-lug?
Measure between the backing plates.
It will be either 55.5" or 57"

There was an early rearend (55.5") and a late (57") rearend.
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Old 05-31-2012, 08:54 AM   #8
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Re: GMC rear end wider than chevy's?

Del mention that the GMC rear is wider then chevy in the sancho build thread http://67-72chevytrucks.com/vboard/s...d.php?t=516801
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Old 05-31-2012, 09:21 AM   #9
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Re: GMC rear end wider than chevy's?

Quote:
Originally Posted by duallyjams View Post
Del mention that the GMC rear is wider then chevy in the sancho build thread http://67-72chevytrucks.com/vboard/s...d.php?t=516801
yes it was in his thread I read that!

Its a 68 with 6 lugs.
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Old 06-04-2012, 03:38 PM   #10
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Re: GMC rear end wider than chevy's?

I think its 57" if I measured correctly.

Its 57" when I measure from point number 1. its that the right place to measure from?


If it is 57" and I want to convert it to disc brakes will it get 1.5" wider?
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