Input and output shafts carry the full torque path through a transmission, so spline condition and length are what determine whether a unit is usable. Replacing a twisted or worn shaft, or fitting the correct length for a swap, is often what allows an otherwise healthy transmission to be put back in service.

Advance Adapters 305023L Installation Notes:

• 23-Tooth Long.
• For Atlas Four-Speed and NP231 Transfer Cases.
• Sold Individually.