Ford F-250 F-350 Remanufactured Manual Transmission 11871T

Description

Fulfill strict heavy commercial fleet benchmarks with 150 lbs of spin-tested drivetrain engineering that directs 470 lb-ft through synchronized forward gear steps in the Ford 11871T Remanufactured Manual Transmission built for Ford F-250 and F-350 four-wheel drive heavy haulers equipped with 7.3-liter diesel engines. This remanufactured transmission provides massive pulling force and enduring mechanical strength.

One-piece cast aluminum main case structures eliminate intermediate split-line flex under heavy gross combined vehicle weight transfers. Internal gear clusters feature case-hardened 8620 alloy steel with precision shot-peened gear roots to distribute severe shock loads. Steel shift selector forks operate with hardened detent balls to secure gear positions. Sintered bronze synchronizer cones resist thermal degradation during rapid downshifts. Dry transmission weight equals 150 lbs without oil, taking 3.4 quarts of approved synthetic manual gear lubricant.

Key Features of Ford 11871T

Commercial fleet supervisors choose to buy Ford 11871T remanufactured manual transmission packages to eliminate gear pop-out and bearing growl in severe-duty work trucks. Spin-bench testing confirms correct gear tooth backlash and smooth detent engagement across all forward gears.

• 8620 case-hardened steel gears withstand aggressive clutch engagement without tooth chipping
• Heavy-duty bronze synchronizer rings prevent gear grind during rapid upshifts
• 5 forward speed gear steps deliver broad torque multiplication for severe truck towing
• Ford 11871T casing surfaces feature precision machined faces to eliminate lubricant seepage
• Rigid steel shift forks resist bend deflection under forceful shifter throws
• Heavy tapered roller bearings support the mainshaft to reduce internal gear lash
• Precision cut reverse idler gears eliminate reverse gear hop under heavy load
• Sealed input shaft bearings stop lubricant seepage into the dry clutch housing

Manual Torque Transfer Parameters

Engineered to transfer 470 lb-ft continuous input torque at 2,800 RPM, this manual gearbox thrives in demanding vocational truck, snowplow, and trailer hauling environments. Operating gear lubricant temperatures maintain an acceptable 150°F to 185°F range under heavy towing stress. Mechanical internal gear steps incorporate a wide-ratio granny low 5.72:1 first gear, 2.94:1 second gear, 1.61:1 third gear, 1.00:1 fourth gear direct link, and a 0.76:1 fifth gear overdrive ratio that reduces highway cruise RPM.

Output Shaft Driveline Fitment

A 31-spline output shaft interfaces with factory transfer cases with zero rotational backlash. Bell housing alignment dowels register to Ford diesel engine patterns within 0.002-inch runout tolerance. Precision machined extension housing faces secure transfer case mounts across varied truck chassis configurations.

Manual Shifter Service Requirements

Shifter detent springs and external linkage stops must be checked during initial road testing to confirm complete gear engagement. This unit is not engineered for track drag racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits. Routine inspection intervals preserve synchronizer ring life under frequent foot-clutch cycling.

• Examine gear lubricant level and cleanliness through the side fill plug each shift
• Drain and replace specified synthetic gear oil every 30,000 miles of driving
• Inspect external shifter tower seals and transfer case linkage every 12 months

Manual Gearbox Crate Manifest

A 3-Year / 100,000-Mile commercial fleet warranty covers internal mechanical components against premature failure. The wooden shipping crate houses the remanufactured heavy-duty manual transmission unit, output shaft seal protector, technical installation guide, and an individual spin-bench gear mesh inspection sheet.