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05-09-2005, 04:53 PM
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#1 |
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Registered User
Join Date: Sep 2003
Location: Lee's Summit MO 64086 (Kansas City)
Posts: 128
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Rear End Gear Ratio
I know this has been covered before, but can't find any history. I am trying to figure out what gear ratio my "72 C10 has. I was told it is supposedly a 3:73. I tried the jack up both rear tires and rotate the tire then count the rotation of the pinion yolk. I came up with 1.5 turns of the pinion to 1 full tire revolution. Some how this doesn't sound right. What ratio would this be?
Thanks Don
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Thanks Don '57 Chevy Nomad '70 Buick GSX '72 Cheyene (Boys' truck) |
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05-09-2005, 05:49 PM
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#2 |
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Registered User
Join Date: Apr 2005
Location: Belton, TX
Posts: 179
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turn the tire 2 time to get your number, 3 3/4 turns would be the 3:73 gears.
good luck |
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05-09-2005, 11:05 PM
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#3 |
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Registered User
Join Date: Jan 2001
Location: Lincoln, Nebraska
Posts: 2,145
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I bet it is a 3.07 in a 72 if it is a factory V8 truck. And I bet it is actually just over 1.5 turns on the pinion to a full revolution on the tire.
Mark
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05-09-2005, 11:10 PM
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#4 |
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Registered User
Join Date: Jun 2002
Location: Lafayette, LA
Posts: 500
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If you don't have posi, keep one of the tires stationary. This will give you the actual ratio. You will most likely have three and a half or three and three quarter turns....3.42 or 3.73.
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69 SWB LT1/4L60E www.classicplace.com |
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05-10-2005, 12:19 AM
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#5 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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If you have a "peggleg", & 1 wheel on the ground, i will bet 3.07 as Hotfun has stated. The ratio on the spiders is 2 to 1......
 L
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05-10-2005, 12:32 AM
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#6 |
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Registered User
Join Date: Jun 2004
Location: warr acres,oklahoma
Posts: 650
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why don`t you get the code off of the tube on passenger side.this will tell you ratio,what it was originally to be put/installed in at factory.or,better yet,take off the cover(no telling how long gear oil has been in there)and count the teeth on ring gear/pinion,divide pinion into ring,wala!or if you look on the side of ring gear while turning,it`ll be stamped into it with teeth count of both.good luck
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