Thread: 53 years young
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Old 02-21-2018, 06:07 PM   #9
Chevy Fleetside
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Re: 53 years young

4.11's are real. Maybe used in an automatic trucks (at least that is where I have seen them) otherwise 4.56's
There might be a tag on the rear diff and if not you have to look at the ring gear and there will be numbers stamped on it, or just count the ring gear teeth and pinion gear teeth and divide the two.
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