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BuckB78GMC · 06-15-2010, 12:24 AM

Put the rear axle on jackstands. Mark one of the tires on the inside and then mark one of the U-joint caps on the rear yoke. Then, turn the driveshaft by hand and count how many turns of the driveshaft equals one turn of the tire. 4 to 1 equals 4.10:1 or 4.11:1, 3 and 3/4 to 1 equals 3.73:1, 3 and 1/2 to 1 equals 3.55:1 and so on...

06-15-2010, 12:24 AM	#15
BuckB78GMC Registered User Join Date: May 2010 Location: Oak Harbor, Wa. Posts: 19	Re: Gear ratio identification Put the rear axle on jackstands. Mark one of the tires on the inside and then mark one of the U-joint caps on the rear yoke. Then, turn the driveshaft by hand and count how many turns of the driveshaft equals one turn of the tire. 4 to 1 equals 4.10:1 or 4.11:1, 3 and 3/4 to 1 equals 3.73:1, 3 and 1/2 to 1 equals 3.55:1 and so on...