You did everything close to correct. Jack one side of rear end up, tranny in neutral. Turn free tire 2 complete revolutions. If drive shaft turns less than 3 full turns, it is 3.0:1 (2.73, etc.) or less. Barely more than 3 turns = 3.07. Close to but not a full 4 turns = 3.73 or 3.90. No, this isn't an exact science, but gets pretty close without opening the rearend up.
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'72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72)
'70 Olds 442 convertible
'70 Olds Rallye 350
'72 Olds Cutlass convertible
[This message has been edited by Yellow Cheyenne (edited April 29, 2002).]
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'72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72)
'56 Chevy short step V-8 (My dad bought it new!!)
'70 Olds 442 convertible
'70 Olds Rallye 350
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