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11-09-2008, 04:21 PM
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#1 |
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Registered User
Join Date: Dec 2007
Location: heathsville virginia
Posts: 3
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rearend ratio on a 1976 C10
I have a 76 step side that originally came with a 350 and 3 speed manual. I just went to check the rearend ratio and after turning the wheel one complete turn, the driveshaft only turned 1.75 times.
 Am I doing something wrong or do I have a 1.75:1 gear ratio in the rearend? Never heard of such a ratio.
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11-09-2008, 06:19 PM
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#2 |
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Well, Whoop-dee-do!
 
Join Date: Mar 2003
Location: Easton, Mo. pop.- me & scarcely a few others
Posts: 2,302
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Re: rearend ratio on a 1976 C10
If you hold one tire still & spin the other, you have to take your number X 2 because of the spider gears.
1.75 X 2 3.50 I think the ratio offered for that year closest to your count was 3.73, so I'd bet your count is actually a "hair over" 1.75 And, welcome to the board!
__________________
'68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD  '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car 
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11-09-2008, 06:53 PM
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#3 |
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Registered User
Join Date: Dec 2007
Location: heathsville virginia
Posts: 3
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Re: rearend ratio on a 1976 C10
Hey guys I do appreciate your help both worked ! Thanx Ed
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11-09-2008, 06:55 PM
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#4 |
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Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: rearend ratio on a 1976 C10
pull the cover off (drain oil) look at the numbers on the ring gear... 41:11 is 41 divided by 11 = 3.727272 or 3.73
raplace seal and oil and you have a 100% accurate idea and a serviced rear diff...
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" Last edited by msgross; 11-09-2008 at 06:55 PM. |
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11-09-2008, 07:14 PM
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#5 |
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Registered User
Join Date: Dec 2007
Location: heathsville virginia
Posts: 3
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Re: rearend ratio on a 1976 C10
Thanx again we got er solved with your help its a 3:42
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11-09-2008, 09:48 PM
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#6 |
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Registered User
Join Date: Feb 2004
Location: eastern blowville heights, ohio
Posts: 57
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Re: rearend ratio on a 1976 C10
That sounds right...my '76 C10 with 350/3 speed came with a 3.42 gear set.
Mike |
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11-10-2008, 03:03 PM
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#7 | |
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Registered User
Join Date: Nov 2008
Location: San Bernardino, CA
Posts: 92
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Re: rearend ratio on a 1976 C10
Quote:
__________________
'71  C25 Camper Special, 402, TH400, Longbed, Power Loc axle, Figuring out the rest of the details....'10 Dodge Charger SXT - DD '91 Kasel M101A2 3/4 ton trailer (It has Chevy rims!) |
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11-10-2008, 06:19 PM
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#8 | |
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Registered User
Join Date: Jul 2006
Location: Central PA
Posts: 12,201
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Re: rearend ratio on a 1976 C10
Quote:
__________________
The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer" Last edited by msgross; 11-10-2008 at 06:20 PM. |
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