The tag on mine is
v 423 F
73 10 5 3E21
So what is mine? I need to know as I may replace with one ton differential
Your missing a couple of characters. In front of the 73 10 F 3E21 there is either one or 2 characters. there will be a 3 or a 3L depending on if it has limited slip or not. So you for sure have 3.73 ratios but you may or may not have limited slip. And you have a 10.5 inch ring gear. The tag should either read 3L73 10 5 3E21 or 3 73 10 5 3E21.
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