A340F 1999-2000 Toyota 4Runner 3.4L AWD/4WD – Remanufactured 4-Speed Automatic Trans

Description

Propelling four-wheel-drive platforms across demanding municipal transit routes with 217 lb-ft torque handling at 240 PSI pump force, this Toyota 4Runner Automatic Remanufactured Transmission restores peak acceleration for 1999 to 2000 Toyota 4Runner 3.4L 4WD vehicles. Fleets gain dependable gear shifts under continuous stop-and-go courier operations.

Heat-treated die-cast aluminum casing walls prevent housing deflection under heavy throttle inputs. Micro-polished separator plates combine with hard-anodized valve bore sleeves to eliminate hydraulic pressure bleed-off in primary clutch circuits. Carbon-metallic friction plates feature radial cooling grooves that evacuate thermal energy into 9.5 quarts of DEXRON-III fluid. Operating at a dry weight of 190 lbs, this transmission integrates dual cooler ports for sustained cooling balance.

Key Features of Toyota 4Runner

Clutch slip during high-load municipal transit schedules prompts maintenance supervisors to buy Toyota 4Runner remanufactured transmission units. Recalibrated electro-hydraulic control packages maintain line pressure integrity across extended commercial fleet duty cycles.

• A 2.80:1 first gear ratio multiplication multiplies launch torque under passenger vehicle loads
• Tolerances inside the ductile iron planetary carrier remain under 0.0025 inches to halt gear whine
• Operating friction circuits use carbon-metallic plates that resist glazing during high-heat operation
• Channeling fluid through remanufactured valve bodies stops shift hesitation between gears
• Severe fleet usage requires the Toyota 4Runner A340F package to maintain consistent line pressure stability
• Hardened steel clutch hubs transfer engine power straight through planetary sets without distortion
• Computerized dyno hydro-pulse testing verifies solenoid pressure response curves prior to crate packaging

Hydraulic Line Pressure Calibrations

A 2.80:1 first gear step transitions through four forward ratios toward a 0.70:1 overdrive step that drops highway engine revolution counts. Operating clutch fluid circuits maintain 160 to 240 PSI pump pressure to stop internal slip during heavy acceleration events. Internal transmission fluid temperatures stay stabilized between 160°F and 190°F during long interstate hauls. Fluid circuits push 760 BTU per minute of heat energy straight toward the external cooling unit. Continuous input torque ratings withstand 217 lb-ft at 4,800 RPM without internal gear deflections.

All Wheel Drive Spline Interface

Transferring engine rotation straight through precision-ground splines, the transfer case interface resists driveline lash. High-tensile alloy case construction prevents differential pin migration during severe wheel slip episodes. Internal parking pawl mechanisms hold 1,500 lb-ft of static rollback torque on 18-degree loading docks. Precision dial indicators measure total output hub runout under 0.0025 inches total indicator reading.

Transmission Adaptation Maintenance Protocols

Command instantaneous electronic gear engagement through complete TCM throttle position calibration sequences following mechanical installation. This transmission is not engineered for track drag racing, extreme rock crawling, or gross combined vehicle weights exceeding factory chassis tow limits.

• Each shift scan electronic transmission codes using professional diagnostic scanners to confirm zero solenoid fault codes
• Every 30 days check fluid level on level ground at 175°F to maintain correct hydraulic immersion
• Every 30,000 miles drain contaminated DEXRON-III fluid and replace external filter elements to protect internal valve sleeves

Commercial Fleet Crate Package

Uninterrupted fleet mobility is backed by a 3-Year / 100,000-Mile commercial fleet warranty covering parts plus labor nationwide. Every secure shipping crate contains one fully remanufactured transmission unit, a balanced torque converter, cooler line seal washers, installation instructions, plus verified dynamometer test printouts.