722.6 1997-1999 Mercedes-Benz S420 4.2L RWD – Remanufactured 5-Speed Automatic Trans

Description

Delivering 295 lb-ft continuous input torque alongside 260 PSI hydraulic line pressure, this Mercedes-Benz S420 Remanufactured Transmission equips 1997 to 1999 Mercedes-Benz S420 4.2L rear-wheel-drive luxury sedans. Fleet transport teams eliminate intermediate gear slip across demanding corporate shuttle operations.

Reinforced aluminum alloy transmission cases resist housing flexion during full throttle highway acceleration. Custom-honed valve bores house oversized hard-coat sleeves that eliminate cross-circuit fluid bypass between clutch channels. High-energy carbon-metallic clutch linings handle extreme heat dissipation throughout 8.5 quarts of MB 236.14 fluid. Weighing 178 lbs dry, this powertrain unit features standard threaded cooler connections designed for fast external heat exchanger integration.

Key Features of Mercedes-Benz 722.6

Torque converter shudder during uphill municipal routes forces vehicle fleet operators to buy Mercedes-Benz remanufactured transmission hardware. Remanufactured electro-hydraulic solenoid packs and new conductor units guarantee firm gear engagements during severe commercial operations.

• A 3.59:1 first gear ratio provides immense pulling force for navigating steep highway inclines
• Induction-hardened 8620 steel planetary gears resist tooth surface pitting during sudden driveline shocks
• Fluoroelastomer clutch piston seals maintain elastic flexibility in temperatures down to minus 40 degrees
• Heat-treated clutch cylinders transfer engine torque straight through gear sets without mechanical distortion
• The Mercedes-Benz 722.6 architecture maintains stable line pressure across changing sump temperatures
• Sonnax regulator valve sleeves stop oil pressure bleed-off to prevent premature clutch friction burnout
• Multi-stage dynamometer load cell testing checks gear lash and shift firmness across all drive speeds

Torque Transfer Hydraulic Limits

A wide mechanical ratio spread includes a 3.59:1 first gear and a 0.83:1 fifth gear overdrive to lower cruising RPM. Operating clutch fluid circuits generate 180 to 260 PSI pump force to ensure instant clutch lockup under heavy throttle. Internal sump fluid operates within 160°F to 190°F thresholds during demanding multi-passenger route work. Cooling circuits discharge up to 820 BTU per minute through the external heat exchanger. Input torque capacity supports 295 lb-ft at 4,500 RPM without planetary carrier deflection.

Driveline Flange Spline Alignment

Interfacing with the driveshaft flex disc, the precision-machined output flange prevents driveline lash under rapid power transfers. Ductile iron case extensions withstand torque deflection during abrupt load shifts. The internal mechanical parking pawl resists 1,500 lb-ft of static holding torque on steep commercial grades. Output shaft axial runout checks confirm alignment under 0.0025 inches total indicator reading.

Shift Adaptation Service Guidelines

Command instantaneous electronic gear engagement through complete TCM adaptive shift relearn 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 using the dedicated workshop dipstick
• Every 30,000 miles drain contaminated MB 236.14 fluid and replace external filter elements to protect internal valve sleeves

Nationwide Fleet Warranty Coverage

Commercial fleet operations receive complete coverage through our 3-Year / 100,000-Mile commercial fleet warranty on internal components. Crated shipments include one remanufactured transmission, an engine-balanced torque converter, replacement cooler connection o-rings, complete technical documentation, plus stamped dyno inspection charts.