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4LHD/4LHDX Application Manual
Powertrain Control Solutions
REV 1.1
1.3 Maximum Performance Limitations
1.3.1 Torque Limitations
Engine Input Torque
4LHD with 258 MM Converter - 340 Nm (250 lb-ft) Maximum
4LHDX with 300 MM Converter - 542 Nm (400 lfb-ft) Maximum
Gearbox Input Torque
4LHD with 258 MM Converter - 660 Nm (487 lb-ft) Maximum
4LHDX with 300 MM Converter - 1057 Nm (780 lb-ft) Maximum
Torque Converter Capacity - Speed
258 mm: 7,000 RPM @ 690 kPa (100 psi), 6500 RPM @ 1020 kPa (150 psi)
300 mm: 7,000 RPM @ 900 kPa (130 psi)
Torque Converter Capacity - Input Torque
258 mm: 340 Nm (250 lb-ft)
300 mm: 542 Nm (400 lb-ft)
Torque Converter Capacity - Stall Power
258 mm: 79.1 kW (106 hp)
300 mm: 124.6 kW (167 hp)
NOTE:
Values @ 690 kPa (100 psi), increase limit by 0.75 kW/14 kPa (1 hp/psi), not to exceed 1020 kPa (150 psi).
Torque Converter Capacity - Turbine Torque
258 mm: 632 Nm (392 lb-ft)
300 mm: 943 Nm (696 lb-ft)
NOTE:
Must verify adequate spline engagement. Reference Section 2.1.1.
Calculated:
(engine torque) x (converter ratio)
Torque Converter Capacity - Stator Torque
258 mm: 340 Nm (250 lb-ft)
300 mm: 542 Nm (400 lb-ft)
Calculated:
(engine torque) x [ (converter ratio) - 1 ]
Torque Converter Capacity - Max TCC Apply Pressure
258 mm: 930 kPa (135 psi)
300 mm: 862 kPa (125 psi)
Minimum pressure, all operating conditions 415 kPa (60 psi).
(engine stall speed) x (engine torque at stall)
9546
To calculate stall power:
