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I have been looking for a traction lock differential w/3.25-3.50 ratio. There is one on [email protected] $200 right now. The ring gear says USA D4ZW 4210 D#1 Can anyone decode this for me? Thank you. Richie

'66conv. [color:red]Red</font color=red> w/ [color:white]White</font color=white> stripes SHELBY STYLE
 

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With the D4ZW, I might guess it to be a '74 Mustang II unit. I think most of these were 7 1/2 integral carrier rear ends. If it's the removable carrier 8" and in the right ratio, $200 is an average deal.

'66 A-code Fastback (therapy)
'89 Town Car (SWMBO D'driver)
'87 Caprice (as req'd by Hagerty)
 
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