SECTION 21 - TRANSMISSION 91
Low pump pressure Worn or broken pump.
Pump seal ring leaking.
Restricted oil strainer or filter.
Blockage in oil ports between transmission sump and oil pump.
Pressure regulator valve stuck open.
Cold start valve stuck open.
High pump pressure Pressure relief solenoid valve faulty.
Has normal operating oil temperature been reached?
Low forward or reverse clutch
pack pressure
Direction control solenoid valve faulty.
Piston seal or O-ring leaking.
Input shaft seal ring leaking.
High forward/reverse clutch
pack pressure
Pressure relief solenoid valve faulty.
Converter pressure low Converter relief valve faulty.
Leak in converter, oil cooler or connection hoses.
Very hot oil.
Converter pressure high Converter relief valve faulty.
Blockage or restriction in the oil cooler.
Very cold oil.
Low 4WD clutch pack
pressure
4WD piston seals leaking.
4WD shaft seal ring leaking.
Leak from 4WD clutch supply pipe.
Faulty 4WD solenoid valve.
Blockage or restriction in 4WD clutch supply pipe.
High 4WD clutch pack
pressure
Pressure relief solenoid valve faulty.
Low lubrication pressure Blockage or restriction in the oil cooler.
Input shaft front seal ring leaking.
Very hot oil.
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