Transfer Case BW4464 for 2017-2019 F250/F350, Electric Shift, Rear Slip Yoke

Description

Configured with slip yoke geometry, this BorgWarner BW4464 Transfer Case handles electric-shift four-wheel drive transfer across 2017 to 2019 Ford Super Duty trucks. This unit manages 450 continuous horsepower at 4,000 input RPM, deploying a 2.64:1 low gear crawler reduction. Range selection runs through an exterior 12-volt rotary servo motor paired with an extended rear slip yoke tailhousing.

High-strength cast aluminum case halves create a rigid housing for carburized helical planetary gear sets. Mechanical lockup relies on heavy steel selector rails, hardened detent pins, and sintered bronze shift fork pads. Fluid capacity measures 2.0 quarts of synthetic Mercon LV fluid, cooled by chassis air movement across exterior heat-shedding ribs. Transmission connection uses an eight-bolt circular flange housing a 34-spline female input drive hub.

Key Features of BorgWarner BW4464

Fleet maintenance centers buy BorgWarner BW4464 transfer case assemblies to ensure reliable driveline performance across heavy service vehicle fleets. Rear slip yoke architecture allows broad suspension articulation during rough construction site transit.

• Deep 2.64:1 planetary reduction gear ratio multiplies engine torque for demanding low-speed crawler service.
• Pre-wired 12-volt electric encoder motor shifts between two-wheel drive high, four-wheel high, and low lock.
• Extended rear slip yoke tailhousing accommodates severe rear suspension travel without driveshaft bind.
• Reinforced steel shift rails maintain absolute fork alignment under intense driveline torque strain.
• High-tensile rocker-joint silent chain drives the front companion flange without skipping under heavy torque.
• Cast aluminum casing withstands stone impacts and severe road salt exposure during winter operations.
• BorgWarner BW4464 internal fluid pump routes pressurized oil through dedicated mainshaft lubrication passages.
• Heavy-duty 34-spline input gear hub withstands extreme turbo-diesel torque without spline distortion.

Rotational Torque Ratings Thermal Management

Continuous input torque capacity reaches 2,800 lb-ft through the planetary gear assembly in low-range lockup mode. An integrated positive displacement pump forces oil through mainshaft galleries, holding operating sump temperatures between 160°F and 190°F under maximum vehicle payload. Ambient airflow across the aluminum case walls dissipates 3.0 kW of thermal energy. High-range direct drive operates at a 1.00:1 ratio, eliminating gear reduction friction during highway transport.

Output Shaft Geometry Alignment Tolerances

Rear driveline connects through an extended internal 34-spline slip yoke tailhousing, while the front output utilizes a four-bolt companion flange with a 3.75-inch bolt circle. Robust internal roller thrust bearings restrain up to 6,000 pounds of driveshaft push force without case distortion. Front companion flange runout tolerance stays within 0.002 inches total indicator reading.

Operating Procedures Prohibited Usage

Entering low-range crawler mode requires a complete vehicle standstill with foot brakes engaged and transmission set to neutral. This part-time four-wheel drive unit is not engineered for continuous operation on high-traction dry pavement surfaces. Technicians must inspect shift motor wiring harness integrity and clear dust from case breathers.

• Inspect fluid level through the upper hex fill plug each shift before departure.
• Drain contaminated fluid and inspect magnetic drain plug debris every 500 hours.
• Clean electric shift motor terminal connections and check vent hose every 12 months.

Warranty Statement Package Manifest

Driveline units arrive protected by a verified 1-Year commercial limited warranty against mechanical defects. The crated package contains the complete transfer case unit, pre-installed electronic shift motor, slip yoke tailhousing, magnetic drain plug, and detailed factory workshop instructions.