BW4446 Transfer Case for 2012-2013 RAM 3500 Cab Chassis, Rear Bolt Yoke, Electric Shift

Description

Anchoring rigid bolt yoke cab-chassis, BorgWarner BW4446 Bolt Marine Transmission units deliver mechanical gear reduction with a 2.64:1 ratio for 2012 to 2013 RAM 3500 cab chassis trucks. Rated for 430 continuous horsepower at a 4,500 RPM input ceiling, this fixed rear bolt yoke carrier stabilizes heavy driveline loads when hauling commercial watercraft.

Constructed with an extra-thick die-cast magnesium casing split horizontally, this unit minimizes bore distortion under severe tractive loads. Carburized 8620 alloy steel helical planetary gears provide heavy reduction, while a wide steel drive chain turns the front output shaft. A fixed rear output bolt flange eliminates slip yoke seal leakage under heavy commercial body weight. The 1.9-quart lubricant capacity flows through an integrated gerotor oil pump, keeping roller bearings lubricated under continuous duty cycles.

Key Features of BorgWarner BW4446 Bolt

Shipyard logistics managers buy BorgWarner BW4446 Bolt marine transmission units to maintain dependable front axle pull on algae-covered slipways. This differential package divides torque evenly between front drive wheels, maintaining forward vehicle momentum across uneven shipyard grounds.

• 2.64:1 low range reduction delivers maximum mechanical advantage for steep ramp pulls
• Fixed rear output bolt flange supports heavy commercial driveshafts without leakage
• Heavy-duty input shaft mates straight with RAM heavy truck automatic transmissions
• BorgWarner BW4446 Bolt internal components maintain gear mesh alignment under shock torque
• Electric rotary shift motor delivers positive four-wheel drive engagement in all weather
• Internal gerotor oil pump maintains continuous lubrication across mainshaft roller bearings
• High-capacity Morse drive chain transfers front driving torque without elongation
• Machined seal bores provide leak-free mating surfaces for front and rear companion yokes

Cab Chassis Flange Mechanics

Operating under medium duty commercial ratings, this front carrier withstands 2,500 lb-ft of continuous input torque at 2,000 driveshaft RPM. The 2.64:1 reduction ratio yields high towing authority while maintaining differential sump operating temperatures between 155°F and 185°F under full load. Heat transfer across the exterior magnesium casing reaches 2.7 kW during continuous four-wheel drive ramp work. Precision-ground hypoid teeth profiles ensure uniform load distribution across tooth surfaces, eliminating localized metal fatigue.

Fixed Rear Bolt Flange Alignment

The fixed rear companion flange connects straight to 1410 series commercial driveshaft universal joints. Opposed tapered roller bearings sustain 4,400 pounds of continuous axial thrust against the rear casing bulkhead. Dial indicator shaft alignment runout must stay below 0.002 inches total indicator reading to prevent output seal failure.

Commercial Chassis Maintenance Regimen

Inspect transfer case fluid levels through the magnetic fill plug prior to engaging four-wheel drive modes under load. As an explicit negative filter, this heavy truck transfer case is not engineered for direct inboard commercial vessel propulsion or marine stern drive systems.

• Examine transfer case lubricant level and case integrity each shift before boat ramp operation
• Inspect driveshaft universal joints and companion flange seals every 250 hours of fleet use
• Drain fluid and clean magnetic collection plugs every 12 months of commercial service

Warranty Hardware Shipment Manifest

This differential carrier includes a 1-Year commercial limited warranty against material and machining defects. Crate packaging contains the assembled front differential carrier unit, fixed rear bolt yoke, front output flange, crush sleeve, and detailed installation manual.