Thread: Rear end ratio
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09-19-2010 06:49 PM #1
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Rear end ratio
Is there a way to determine the ratio by counting revolutions of the drive shaft and tire? No tags on the rear end. S10 Blazer.
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09-19-2010 07:25 PM #2
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09-20-2010 09:31 AM #3
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Thanks for the reply! I saved it for the future.
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09-20-2010 10:46 AM #4
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If the rear is a posi, jack up the rear, mark the bottom of the tire and the bottom of the driveshaft and turn the tire one revolution while counting how mwny times the driveshaft goes around.
If ti's NOT a posi, do the same thing with the vehicle slowly rollin forward on the ground.
Or, you could pull the rear cover anf count the teeth.
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09-20-2010 12:21 PM #5
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Yep, I've got an S10 rear in the 23, non posi and I simply put a mark on the tire and on the driveshaft then rolled it forward and counted the driveshaft and tire revolutions. Mine ended up a 3:00, which seems high, but worked out perfect.
Don
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09-20-2010 01:55 PM #6
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Just keep your head out from under the tire as you count
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09-20-2010 02:14 PM #7
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Uh huh, sounds like the voice of experience, Charlie.
Originally Posted by cffisher
Just keep your head out from under the tire as you count
Don
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09-22-2010 05:15 PM #8
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Thanks guys it is about 3 1/3 drive shaft revolutions v.s. 2 tire revolutions. Now I need start a new thread to address wheel back spacing.
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