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02-17-2023, 06:17 PM
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#1 |
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Registered User
Join Date: Sep 2018
Location: Stoneville NC
Posts: 11
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1963 GMC 2wd rear end gear
Hello all, I have a 63 GMC with a Dana 44 rear and I was wondering if anyone would now the stock gear ratio? My gear tag is not on it Thanks in advance
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02-17-2023, 11:09 PM
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#2 |
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Senior Member
 Join Date: Aug 2005
Location: Los Angeles
Posts: 1,314
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Re: 1963 GMC 2wd rear end gear
3.07 or 3.54 for 2WD, 3.54 for 4WD were the 'factory' choices.
__________________
1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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02-22-2023, 11:16 AM
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#3 |
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Registered User
Join Date: Mar 2016
Location: Old Orchard Beach, ME
Posts: 57
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Re: 1963 GMC 2wd rear end gear
With the transmission in neutral, rotate the rear driveshaft by hand. Count the number of driveshaft revolutions required for one revolution of the tire.
If the driveshaft turns approximately 3-1/2 times, you have a 3.54 ratio, etc. It is helpful to use a grease pencil or chalk to make a reference point on both the tire and driveshaft while performing this test. Number of Turns Approx. Gear Ratio 3 3.05 : 1 3 - 1/2 3.54 : 1 3 - 3/4 3.73 : 1 4 4.10 : 1 4 - 1/2 4.55 : 1 |
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