F4A42-1 2001-2002 Mitsubishi Mirage 1.8L FWD – Remanufactured 4-Speed Automatic Trans

Description

Command 113 horsepower and a 0.73:1 overdrive cruising ratio while holding fluid sump temperatures below 188°F across demanding high-mileage urban delivery corridors inside the Mitsubishi F4A42 Remanufactured Transmission built for 2001 to 2002 Mitsubishi Mirage 1.8-liter front wheel drive configurations. This four-speed transaxle maintains steady hydraulic pressure through congested municipal routes.

Die-cast A380 aluminum cases withstand high structural torsional stresses under heavy commercial operation. Internal components feature nitrided steel sun shafts, ductile iron planetary planet carriers, and carbon-metallic friction discs cut with radial cooling channels. Hard-anodized valve body bore sleeves correct factory wear points to eliminate hydraulic fluid bypass. Transmission oil cooler ports utilize 3/8-inch inverted flare connections, with total dry weight at 168 lbs and fluid capacity measuring 7.4 quarts.

Key Features of Mitsubishi F4A42

Fleet operators choose to buy Mitsubishi F4A42 remanufactured transmission units to resolve slipping and delayed engagement issues in high-mileage delivery sedans. Engineered hydraulic updates prevent line pressure loss during continuous stop-start driving cycles in demanding summer heat.

• 235 PSI maximum line pressure maintains clutch pack grip during sudden vehicle acceleration.
• Hard-anodized valve bore sleeves stop internal hydraulic fluid leakage inside the valve body.
• High-friction carbon clutch discs resist heat glaze under continuous commercial urban routing.
• Computer-balanced remanufactured torque converter eliminates cyclic vibration through the front chassis.
• Heat-treated steel planetary gear teeth hold firm gear lash tolerances under severe shock loads.
• Fast-acting pulse-width modulated solenoids cycle within 38 milliseconds to coordinate ratio shifts.
• Dynamometer-validated Mitsubishi F4A42 automatic transaxle electronics provide accurate speed signals to the TCM.

Dynamic Torque Transmission Parameters

Internal pump pressure scales from 130 to 235 PSI across forward driving modes to preserve clutch clamp stability. Transmission sump temperatures remain between 160°F and 190°F under standard fleet transit demands. Maximum continuous input torque reaches 175 lb-ft at 3,200 RPM, transferring unwanted heat through an auxiliary cooler circuit capable of shedding 510 BTU per minute. Gear ratios span 2.84:1 in first gear, 1.53:1 in second gear, 1.00:1 in third gear, and 0.73:1 in fourth overdrive gear for efficient highway travel.

Differential Spline Axle Interface

Dual differential outputs contain 25-tooth splines that accept original front CV axle shafts without binding. The heavy internal parking pawl mechanism holds up to 1,250 lb-ft static torque on severe grades. Transaxle bell housing runout remains under 0.003 inches, maintaining perpendicular alignment between the casing face and the engine crankshaft.

Maintenance Protocols Adaptive Calibration

Installation requires a computerized TCM adaptive relearn process and careful fluid level verification at operating temperature through the dipstick tube. This front wheel drive transaxle is not engineered for competitive motorsport racing, excessive trailer towing beyond vehicle ratings, or rough off-road terrain transit.

• Check transaxle fluid dipstick level and fluid condition each shift before operating the fleet vehicle.
• Drain the transmission fluid pan and install fresh filter elements every 30,000 commercial service miles.
• Check external transmission cooler lines and fittings for fluid seepage every 250 fleet run hours.

Warranty Verification Crate Contents

Supported by a 3-Year / 100,000-Mile commercial fleet warranty for complete operational peace of mind. Each wooden crate holds the remanufactured transaxle module, spin-balanced torque converter, new cooler line sealing washers, installation technical instructions, and an ATSG-standard dynamometer inspection record proving line pressure compliance.