S5-42 Manual Trans for 1987-1992 F-series 6.9L/7.3L 2WD 5 Speed, PTO Not In Use

Description

Meet strict commercial fleet maintenance benchmarks with 175 lbs of dyno-certified manual drivetrain engineering that directs 420 lb-ft continuous diesel torque through 5 forward gear ratios in the ZF S5-42 Remanufactured Manual Transmission engineered for 1987 to 1992 Ford F-Series two-wheel drive work trucks powered by 6.9-liter and 7.3-liter diesel engines without PTO requirements.

High-integrity cast aluminum casing construction provides rigidity to prevent shaft deflection under heavy diesel towing loads. Multi-cone synchronizers on forward gears feature carbon-composite linings to eliminate gear clash during loaded grade descents. A sealed 6-bolt cast iron plate covers the side PTO opening to prevent oil weeping. Dry unit weight registers 175 lbs. Fluid capacity holds 3.4 quarts of synthetic Mercon ATF fluid introduced through threaded magnetic inspection ports.

Key Features of ZF S5-42

Commercial truck mechanics choose to buy ZF S5-42 remanufactured transmission units to restore positive manual gear selection in older two-wheel drive haulers. Comprehensive remanufacturing replaces all critical bearings and synchronizers to provide durable commercial service across regional transport lanes.

• Sealed 6-bolt PTO cover plate prevents gear oil leaks on non-PTO two-wheel drive trucks.
• Carbon-composite synchronizers eliminate gear grinding during aggressive downshifts.
• Massive helical cluster gears withstand 420 lb-ft continuous input diesel torque.
• Hardened shift detent balls stop transmission jumping out of gear on rough pavement.
• High-capacity Timken tapered roller bearings hold shaft endplay within factory limits.
• Integrated bell housing bolts straight to Ford diesel intermediate adapter plates.
• Remanufactured ZF S5-42 gearsets undergo rotational tests to verify silent gear mesh.
• Viton front and rear oil seals prevent fluid leaks under high operating temperatures.

Diesel Reduction Steps Torque Handling

The 5-speed manual gear train provides wide ratios of 5.72:1 in first, 2.94:1 in second, 1.61:1 in third, 1.00:1 in fourth, and 0.76:1 in fifth gear overdrive. Continuous duty designation supports up to 420 lb-ft continuous input torque at 2,000 RPM. The wide-ratio first gear enables effortless low-speed maneuvering with heavy commercial trailers. External casing ribs facilitate heat radiation to maintain lubricant temperatures below 180°F across demanding regional transport corridors without fluid breakdown.

Two-Wheel Drive Driveline Spline Geometry

A 10-spline 1.25-inch diameter input shaft slides flush into standard 12-inch diesel clutch plates without binding. The two-wheel drive rear output shaft accepts standard driveshaft slip yokes with total dial indicator runout under 0.002 inches. Tailhousing bushings support rotating slip yokes to isolate driveline vibrations from vehicle crossmembers.

Manual Drivetrain Field Service Rules

Check clutch hydraulic release cylinder travel to ensure complete plate release before road testing. Fill the transmission case using synthetic Mercon ATF fluid through the side check port until fluid reaches the threads. This unit is not engineered for closed-course drag strip racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits.

• Inspect transmission casing seams and rear slip yoke seals for seepage each shift.
• Drain transmission fluid, clean magnetic plugs, and refill every 30,000 miles.
• Inspect transmission crossmember rubber insulator mounts for deterioration every 12 months.

Commercial Warranty Terms Crate Manifest

Covered by an industry-leading 3-Year / 100,000-Mile commercial fleet warranty covering replacement components and certified shop labor. Each secured shipping crate contains one remanufactured manual transmission, sealed PTO cover plate, new throwout bearing, installation instruction manual, and signed rotational inspection report.