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02-06-2003, 11:34 PM
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#1 |
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Registered User
Join Date: May 2001
Location: Benbrook, TX
Posts: 1,060
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? gear ratio
Need info. on gear ratio on a 67 1/2 ton.
What do I look for? Where do I look?
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69 swb stepside, rebuild and upgrade in progress |
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02-07-2003, 12:16 AM
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#2 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,715
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If your truck has the Dana 44 rear axle it will be on a tag unless someone has removed it. Otherwise, get the stamped number off the top passengier sid axle tube ~6" from the pumpkin. Or post what motor your truck came with. Most likely it has 3.73. You can pull the cover and look for the ratio numbers stamped on the ring gear (39:11, 41:10 or something similar.) After 35 years it probably needs a fluid change anyhow...
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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02-07-2003, 12:18 AM
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#3 |
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Registered User
Join Date: May 2001
Location: Benbrook, TX
Posts: 1,060
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Not on ring gear. What kind of number will be there?
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69 swb stepside, rebuild and upgrade in progress |
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02-07-2003, 12:21 AM
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#4 |
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Registered User
Join Date: May 2001
Location: Benbrook, TX
Posts: 1,060
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I can tell that the rearend is 12 bolt and is 6 lug.
I there any axel, [that will fit] to make a 5 lug?
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69 swb stepside, rebuild and upgrade in progress |
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02-07-2003, 12:22 AM
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#5 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Just count the teeth on the drive gear, and the driven gear, and divide the two...that'll get you your gear ratio.
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02-07-2003, 09:17 AM
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#6 |
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Registered User
Join Date: Mar 2001
Location: indianapolis,indiana,usa
Posts: 506
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if you take the bed off there is a set of numbers on top of rear end to the passenger side of the pumpkin if you get that number i can tell you what it is
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02-07-2003, 11:42 AM
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#7 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,715
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If you have the cover off, rotate the ring gear slowly. Somewhere around the edge you will see a part number, a manufacturing date, and the number of teeth on the ring gear and the number of teeth on the pinion gear. Similar to what I put above. Do the math (41/10=4.10 therefore a 4.10:1 ratio, the pinion turns 4 times for every one revolution of the ring gear.) Every gear set has these numbers. Without fail.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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