Dana 60 info and help

Yes, '66-'69 Mopar passenger car Dana 60 rearends came with 23 spline axles.

Richmond has never labeled the series of their Dana 60 gears correctly.

If a gear is labeled as "3 series", it should fit a carrier designed for 3.54 and 3.73 ratios.

If a gear is labeled as "5 series", it should fit a carrier designed for ratios like 5.13, 5.38 etc..

I avoid using the terminology "4 series" to avoid confusion associated with 4.10 and 4.30 ratios.