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Discussion Starter #1
I have a 66 Mustang with an 8 inch rear end and Im trying to ID the gear ratio. The code I got off the tag is:

WCY-E
3.20 6F3 902

Anyone know? Is the ratio 3.20:1?
 

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Discussion Starter #3
Hmmmm... Isn't that kind of rare for a 6 banger? Most of em came stock with a 2.80:1 ratio so was this maybe an extra at purchase?
 

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Both should use four lug axles. Neither are plug-n-play, as they are integral carrier design, so they are not replacable like the good ol' 8 and 9" rear ends. You might be able to swap out the entire rear axle assembly, however....
 
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