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Old 05-27-2007, 10:00 PM   #1
RyanG
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Rear End Gear Ration

So I am trying to figure out the gear ration in my 71 LWB. I pulled the dif. cover adn was unable to spin the yoke to count all the teeth on the big gear and the small gear...however the following numbers are on the big gear: 3817778 11.41 GM 9-70 2........does this make sense to any one? I divided the 11 into th 41 and came up with 3.72.......is that my gear ration???????
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Old 05-27-2007, 10:01 PM   #2
1969k10stepside
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Re: Rear End Gear Ration

If 11 and 41 are on the ring gear,it makes it a 3:73.
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Old 05-27-2007, 10:04 PM   #3
65-72 chevytoys
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Re: Rear End Gear Ration

it is a 3.73 ratio
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Old 05-27-2007, 10:05 PM   #4
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Re: Rear End Gear Ration

That is the big gear right......they are on that big gear.....so that is my gear ration correct......I just want to be sure because I am putting an LS1 in my truck and I to program the PCM....thanks for the help....
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Old 05-27-2007, 10:06 PM   #5
GREASEMONKEY72
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Re: Rear End Gear Ration

it comes out to a 3.72 on the calculator but its a 3.73 gear
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Old 05-27-2007, 10:07 PM   #6
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Re: Rear End Gear Ration

I realize that now.....I just didn't round.....thanks guys.
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