Spicer 3-3-01683X 1350 Series Transmission Slip Yoke (31-Spline, 1.688" Barrel Diameter)

Eliminate high-speed driveline vibrations, seal up transmission fluid leaks, and restore smooth power transfer with this genuine Spicer 1350 Series Transmission Slip Yoke Assembly. Engineered as a high-durability, premium original equipment manufacturer (OEM) replacement component, this slip yoke (Part Number: 3-3-01683X) is designed to plunge seamlessly within the transmission tailhousing or transfer case output shaft under demanding high-torque conditions.

On rear-wheel drive and four-wheel drive vehicles, the slip yoke slides over the output shaft splines to allow the driveshaft to safely change length as the rear suspension compresses over bumps. Over high mileage, heavy towing, or hard acceleration, the outer barrel of a factory yoke can develop deep grooves or scoring from the tailshaft housing seal. This wear lets transmission fluid weep past the seal, causing a persistent undercarriage leak. Furthermore, internal spline wear creates structural slop between the output shaft and the driveshaft, manifesting as an aggressive chassis vibration at highway speeds or a loud metal clunking noise when shifting from park to drive. Sourcing an authentic Spicer forged steel yoke resolves this play and protects your transmission tailhousing bushings from premature failure.

Manufactured by Dana Spicer, the undisputed global leader in drivetrain engineering, this slip yoke is forged from high-tensile steel and case-hardened to exact metallurgical standards. It features a 31-spline configuration (commonly noted as 30-spline based on standard spacing with one wide blind spline/counterbore) and a precision-ground 1.688-inch barrel outer diameter. Measuring 7.50 inches from the center of the universal joint cross to the end of the barrel, it is machined exclusively to accept heavy-duty 1350 series universal joints (featuring 1.188-inch bearing cup diameters). Sourcing this genuine OEM component ensures an exact factory fit that satisfies original drivetrain blueprints.

Component Highlights:

• Cures Tailshaft Leaks & Vibrations: Features a flawless, mirror-polished barrel finish to slide across your transmission tailhousing seal smoothly without weeping fluid or introducing rotational runout.

• Forged Structural Rigidity: Fabricated from premium-grade steel alloy to deliver maximum torque handling capacity and resist splitting or twisting under high-payload acceleration.

• Massive 1350 Series Strength: Engineered with precision-bored yoke ears tailored exclusively for high-capacity 1350 series universal joints using external outside snap rings.

• Genuine Spicer OEM Fitment: Manufactured with identical material densities and engineering tolerances used on original factory vehicle assembly lines.

Drivetrain & Fitment Specifications:

• Driveshaft Series: 1350 Series Architecture (3.625 in cap-to-cap width | 1.188 in bearing cap diameter).

• Spline Count & Design: 31-Spline (30 Splines plus 1 Wide Blind Space) with internal counterbore.

• Barrel Outer Diameter: 1.688 inches.

• Center-to-End Length: 7.50 inches.

• Common Transmission & Transfer Case Fitment: Fits a massive array of classic and modern heavy-duty Ford platforms running C6, E4OD, 4R100, and T45 transmissions, as well as various New Process (NP205, NP208) transfer cases utilizing a 1.688-inch output seal diameter.