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#1 |
Senior Member
Join Date: Jan 2003
Location: Bay Area, Northern California
Posts: 1,344
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Differential numbers decipher please
It is a 14 bolt full floater pictured below. Only thing I know about it is, it is not stock to the 72 C20 it is bolted to right now. I would like to know the gear ratio and anything that you could share looking at the numbers and pictures. Thanks!
I took the numbers from the area pointed by the red arrow and they read: 1 GM 3977334 10 41 4 76 I plan on jacking it up sometime and count tire/driveshaft rotations but it is not on stable ground right now.
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03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays. Last edited by greenhorn male; 03-18-2005 at 10:43 PM. |
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#2 |
Registered User
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
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1 GM 3977334 10 41 4 76
^ ^ 41 divide by 10 is 4.10. 4 76 may be a date code(April 1976) I could be wrong.
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I think the world needs a drink... ![]() Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd ![]() Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster |
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#3 | |
Senior Member
Join Date: Jan 2003
Location: Bay Area, Northern California
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Quote:
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03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays. |
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#4 |
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Location: CA
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If you don't trust the numbers, count the teeth. You'll find 41 and 10 teeth on the two gears.
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#5 |
Senior Member
Join Date: Jan 2003
Location: Bay Area, Northern California
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I was just trying to confirm when sdkid said "I could be wrong", if he was just referring to the date code or his whole response.
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03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays. |
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#6 |
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Join Date: Dec 1999
Location: Old Mission, MI, USA
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sdkid is correct on the ratio and the date code.
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Tim |
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#7 |
Registered User
Join Date: Feb 2003
Location: The Rubber City
Posts: 5,498
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its also an open diff, which is good if you want to get a detroit locker for it.
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1969 GMC K2500 ![]() 1996 Honda Accord 2007 Kawasaki KLR 650 |
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#8 |
Senior Member
Join Date: Jan 2003
Location: Bay Area, Northern California
Posts: 1,344
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Thanks
Thanks for all the information. This is great advise. I've always wondered what people meant by open differential.
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03 Tahoe 72 GMC Super Custom 2500 Custom Camper, my reliable workhorse. Dual gauged tanks, dual battery trays. |
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