5503-318 Transmission Slip Yoke, Fits 1550 Series – 30/31 Splines x 1.610 Spline Dia 40189967

5503-318 UDS 1550 Series Transmission Slip Yoke 30/31 Splines 1.610 Dia 68RFE

The 5503-318 is a UDS 1550 series transmission slip yoke with 30/31 splines at a 1.610" spline diameter. The center U-joint to end dimension is 9.750" and the hub diameter is 2.201". Per the Notes attribute, this yoke fits the 68RFE 2WD transmission and is applicable to Chrysler, Dodge, and GM vehicles. The counter bore diameter is 0, indicating no counterbore machined into the bore end.

Specifications

• Part Number: 5503-318
• Brand: UDS
• Series: 1550
• Spline Count x Diameter: 30/31 x 1.610"
• Center U-Joint to End: 9.750"
• Hub Diameter: 2.201"
• Counter Bore Diameter: 0 (none)
• Application: 68RFE 2WD, Chrysler/Dodge/GM vehicles

When fitting the 5503-318, verify the 68RFE transmission output shaft carries either 30 or 31 splines at 1.610" diameter — the dual spline count indicates compatibility with either spline variant on this transmission family. The 9.750" CL-to-end establishes the extension length into the transmission tail housing; confirm this provides adequate engagement depth without bottoming the yoke against the output shaft seal retainer under full suspension travel. The 5503-318 is a 1550 series yoke; the companion driveshaft weld yoke, U-joints, and all related components must be 1550 series to match cap seat geometry. The 68RFE is a 6-speed automatic used in Dodge Ram and Chrysler applications — cross-reference OEM 2WD output shaft spline count against 30/31 before ordering. Hub diameter of 2.201" contacts the transmission tail housing seal; confirm seal bore dimensions match.