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#1
07-23-2014, 12:11 PM
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I think PHS will answer this but, yes, M21 normally meant 3.90 or lower.
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#2
07-23-2014, 01:54 PM
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If it was a 455 car, i think 3.31 would be the standard gear and 3.55 optional. Does it have a 12 bolt rear?
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#3
07-23-2014, 02:43 PM
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Jack up the rear and secure it.
Rotate a valve stem one 360* rotation. Count the number of rotations the driveshaft yoke makes. On a posi - it will be the full count. Non-Posi - double the count. (1.75 turns would = 3.50) |
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