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Old 06-23-2002, 11:42 PM   #1
Patrick Sullivan
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How big is the ring gear on an HO52/HO72?

Just wondering.. I can't find any info on them at all.
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Old 06-23-2002, 11:50 PM   #2
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It's been a long time since I called Randy's Ring & Pinion, but they were the only r&p guys that even knew what I was talking about. I can't remember for sure, but they either told me it was a 12¼" or 11¾". Pretty sure they said 12¼".
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1995 K2500 'burb
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Old 06-24-2002, 01:39 AM   #3
jostrans68
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I will try to measure in the next few days i have a 3.90 gear set setting here to go in mine
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Old 06-24-2002, 02:24 AM   #4
Fast68Chevy
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http://www.drivetrainspecialists.com/setupspec.htm

http://www.favorites.com/~jolly/Jolly2500.htm


http://www.dynatrac.com/gm_rear.html
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Old 06-24-2002, 02:57 AM   #5
Duallie
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I just eyeballed several of mine, and they're all a hair under 10.5".
Ever since that 4WD magazine incorrectly stated that an Eaton was 12.25", everyone has been using their wrong quoted number.
It feels good to get that off my chest.
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Old 06-28-2002, 09:42 PM   #6
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Funny thing. After this thread, I was browsing my '72 Chassis Overhaul Manual. It has the ring gear dimensions in it.

Duallie is absolutely right. The H-072/H-052 do not have a 12¼" ring gear. They have a 10 1/8" ring gear. The H-110 (1-ton axle) has the 12¼" ring gear.
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1968 K20 fleet
1969 K10 swb fleet
1972 K10 Suburban
1972 C10 lwb step
1992 K1500 'burb
1995 K2500 'burb
1997 C1500 'burb
1999 K1500
2000 K1500 'burb

Why do I own so many Suburbans?
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