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Old 04-14-2010, 03:29 AM
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Default Exact same truck

I have the exact same truck that you have. I ordered it out brand new. I had the choice of a 3.55 or 3.73 axle ratios. I took the 3.55. Usually there is a metal tag near the rear diff with the number. Or you can jack up the rear, block the tires, put the trans in neutral, and compare the driveshaft revolutions to the tire revolutions as you turn the driveshaft by hand.
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