[Guest]

Anyone know the gear ratio reference for code # stampings?
Ring is C4DW-4210"A"C 12 x 39. Pinion is "C" C4DW-4610A.
Maybe a way to calculate by tooth count.
Thanks

 

[mikes69mach1]

Count the teeth on the ring gear and devide it by the number of teeth on the pinion gear and that is the ratio.

 

[modifiedmustang]

If that "12 X 39" is the pinion tooth count and ring gear tooth count, then it's a 3.25 rear end (39 / 12 = 3.25).