Ford F-250 F-350 Remanufactured Manual Transmission 11879T

Description

Command 440 lb-ft input torque and a tall 0.77 to 1 highway overdrive ratio while keeping gear case operating temperatures below 190°F across demanding interstate delivery corridors inside the Ford F-350 11879T Remanufactured Manual Transmission. This two-wheel-drive manual package delivers uncompromising highway transport efficiency.

Constructed using high-density A380 cast aluminum casing material, this unit features carburized alloy steel gear clusters and molybdenum-coated synchronizer assemblies. Low-friction caged needle bearings support each forward speed gear to minimize rotational drag. A hardened steel front bearing retainer maintains clutch release bearing alignment without grooving. Standard six-bolt PTO side plates furnish auxiliary hydraulic power. The gearbox weighs 174 lbs dry and holds 3.4 quarts of synthetic manual gear lubricant.

Key Features of Ford 11879T

Fleet operators choose to buy Ford 11879T remanufactured transmission gearboxes to maximize commercial payload transit speeds with minimal mechanical down-time. Rigorous dynamometer spin cycles confirm smooth gear change characteristics and silent gear operation across every forward speed.

• 440 lb-ft input torque threshold transfers heavy turbodiesel torque without gear deflection
• 5 forward speed selections offer versatile ratio balance for highway logistics routes
• 0.77 to 1 overdrive ratio maintains lower engine cruising revolutions at high road speeds
• 4.14 to 1 first gear reduction provides smooth starts without excessive clutch slip
• Nitrided shift rails resist surface galling from repetitive vocational gear shifts
• Precision-ground synchronizer stop rings halt gear clash during rapid downshifting
• Heavy-duty case ribs resist bell housing flexing under dynamic axle weight transfer
• Dual PTO aperture covers allow auxiliary hydraulic drive equipment mounting

Input Torque Kinetic Limits

Engineered for High-Mileage Transit fleets, this manual unit sustains 440 lb-ft continuous input torque at 3,000 RPM. Internal forward ratios include 4.14 to 1 first, 2.37 to 1 second, 1.42 to 1 third, 1.00 to 1 direct fourth, and 0.77 to 1 fifth gear. Reverse provides 3.79 to 1. The ribbed aluminum casing releases 460 BTU per minute of heat during sustained highway hauling.

Rear Driveline Extension Specifications

The two-wheel-drive extension housing contains a precision-machined babbit bushing to guide the driveshaft slip yoke. A hardened 31-spline output shaft holds concentric dial runout within 0.0018 inches to prevent high-speed driveline vibration. Internal shift rail detents provide positive gear positioning without risk of popping out under sudden engine braking.

Routine Service Fleet Directives

Monitor clutch release bearing travel and inspect transmission crossmember support bolts during scheduled vehicle inspections. This unit is not engineered for sand dune racing or vehicle operating weights exceeding manufacturer gross axle ratings.

• Check oil level through the inspection port every 250 hours
• Drain and flush manual transmission fluid every 30,000 miles
• Inspect clutch hydraulic lines for leakage each shift

Secured Delivery Crate Specifications

Furnished with a comprehensive 5-Year / 100,000-Mile fleet warranty, this gearbox arrives secured on a heavy wooden freight pallet. The crate package includes the complete remanufactured manual transmission, pre-cut top cover gasket, backup light indicator switch, and verified dyno runout test sheet.