AUTOMATIC TRANSMISSIONS Hydra-Matic 3L30
Geo; Tracker Suzuki; Sidekick
DESCRIPTION & OPERATION
Automatic transmission provides 3 forward speeds and reverse. Main internal components are; oil pump, Torque Converter w/Clutch (TCC), reverse clutch, 2nd clutch, 3rd clutch, one-way clutch (sprag type), compound planetary gear set, low brake, governor and valve body. See Fig. 1.
TROUBLE SHOOTING
NOTE: Poor engine performance can have a negative effect on transmission performance.
Preliminary Checks
Ensure fluid level is correct. Inspect and adjust shift linkage and park/neutral position switch (if necessary). Check idle speed RPM and adjust as necessary. Road test vehicle to ensure proper engine performance.
SYMPTOM DIAGNOSIS
Low Fluid Level
Check for fluid leak out of filler tube, external fluid leak(s) and faulty vacuum modulator.
Fluid Leak From Filler Tube
Check for high fluid level, engine coolant in transmission fluid, pinched breather hose and leak in oil pump suction circuit.
Low Fluid Pressure
Check for low fluid level, clogged oil pump screen, leak in oil pump suction circuit, leak in oil pressure circuit, pressure regulator valve. Download File PDF
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