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Home >> Isuzu >> 1995 >> Trooper S, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Overhaul - 4L30-E >> Transmission Testing >> Line Pressure Specifications

Line Pressure Specifications

LINE PRESSURE SPECIFICATIONS

Shift Mode Shift Lever Position Line Pressure psi (kPa)
Engine Idling
Normal & Power "D", "3", "2" & "L" 48 (330)
Winter "D" 46-52 (316-358)
Normal, Power & Winter "R" 65-74 (450-508)
At Stall Speed
Normal & Power "D", "3", "2" & "L" 150-161 (1031-1111)
Winter "D" 150-161 (1031-1111)
Normal, Power & Winter "R" 210-227 (1449-1562)
LINE PRESSURE SPECIFICATIONS

Shift Mode Shift Lever Position Line Pressure psi (kPa)
Engine Idling
Normal & Power "D", "3", "2" & "L" 55 (380)
Winter "D" 46-52 (316-358)
Normal, Power & Winter "R" 68-76 (470-520)
At Stall Speed
Normal & Power "D", "3", "2" & "L" 150-161 (1031-1111)
Winter "D" 150-161 (1031-1111)
Normal, Power & Winter "R" 210-227 (1449-1562)
LINE PRESSURE SPECIFICATIONS

Shift Mode Shift Lever Position Line Pressure psi (kPa)
Engine Idling
Normal & Power "D", "3", "2" & "L" 55 (380)
Winter "D" 46-52 (316-358)
Normal, Power & Winter "R" 68-76 (470-520)
At Stall Speed
Normal & Power "D", "3", "2" & "L" 150-161 (1031-1111)
Winter "D" 150-161 (1031-1111)
Normal, Power & Winter "R" 210-227 (1449-1562)
LINE PRESSURE TEST TROUBLE SHOOTING

Application Probable Cause
High Line Pressure (1) Defective Throttle Position (TP) Sensor, Force Motor Solenoid Plunger Stuck, Defective Force Motor Solenoid Or Wiring Circuit, Stuck Feed Limit Valve In Adapter Case Valve Body Loose Torque Converter Housing Bolts, Stuck Pressure Regulator Valve Or Boost Valve In Oil Pump, Missing Check Balls In Valve Bodies, Defective Seals Or Gaskets
Low Line Pressure Low Fluid Level, Defective Throttle Position (TP) Sensor, Restricted Or Damaged Oil Filter, Force Motor Solenoid Plunger Stuck, Stuck Feed Limit Valve In Adapter Case Valve Body, Loose Torque Converter Housing Bolts, Stuck Pressure Regulator Valve Or Boost Valve In Oil Pump, Restricted Pressure Regulator Valve Oil Passages, Defective Oil Pump, Missing Check Balls In Valve Bodies, Defective Seals Or Gaskets
(1) With TECH 1 scan tool connected to data link connector, or if transmission is in back-up mode, maximum line pressure will be obtained.