90-4-591-1X – End Yoke – SPL90 Series – 2.114″ Splines Dia – 3.000″ Hub Dia

When comparing aftermarket end yokes, what matters is dimensional precision and material consistency -- not packaging or price point. The 90-4-591-1X from UDS is built to the SPL90 Series OEM specification: 2.114" spline bore, 3.000" hub diameter, and BS snap ring retention. These numbers are non-negotiable -- they either match your output shaft or they don't.

OEM vs. Aftermarket: What Changes

OEM end yokes are manufactured to tight tolerances with controlled heat treatment for the specific vehicle model. The UDS 90-4-591-1X replicates these tolerances in an aftermarket context, using the same SPL90 Series dimensional standard that OEM suppliers use. The practical difference is availability: this part ships from Universal Driveshafts' inventory, while OEM sources may require dealer ordering with extended lead times.

• Spline interface: 2.114" x 32 splines -- matches OEM output shaft
• Snap ring type: BS -- same retention method as factory
• Hub diameter: 3.000" -- registers against factory seal bore

Specification Table

Full dimensional data for the 90-4-591-1X. Every measurement is an as-machined figure, not a nominal or nominal +/- value.

Selecting the Correct Part

The most common ordering error for end yokes is confusing similar-sounding series numbers or assuming that all yokes for a given vehicle are interchangeable. Verify these specifics before ordering the 90-4-591-1X: output shaft spline diameter must be 2.114", spline count must be 32, and the shaft's snap ring groove must match the BS style. Through bore clearance (2.250") is especially important if your application routes a cable or shaft through the output yoke bore.

Part 90-4-591-1X is a UDS product. Universal Driveshafts stocks a complete range of SPL90 Series end yokes, U-joints, and driveshaft components. Contact our technical team for fitment assistance.