Subaru Impreza 2004 Service Manual page 37

AUTOMATIC TRANSMISSION
Stall speed (at sea level)
Less than specifications
Greater than specifications
Stall Test
Position
• Throttle valve not fully open
2 (HOLD switch ON), R • Erroneous engine operation
• Torque converter clutch's one-way clutch slipping
• Line pressure too low
D • Low clutch slipping
• One-way clutch malfunction
• Line pressure too low
R • Reverse clutch slipping
• Low & reverse brake slipping
• Line pressure too low
2 (HOLD switch ON) • Low clutch slipping
• 2-4 brake slipping
4AT-36
Cause