AUTOMATIC TRANSMISSION — Troubleshooting (Mechanical System Tests) AT-33 (d) If the stall speed in R range is higher than specified without the rear wheels rotating: • Line pressure too low • Direct clutch slipping • First and reverse brake slipping • O/D one-way clutch not operating properly (e) If the stall speed in both R and D ranges are higher than specified without the rear wheels rotating: • Line pressure too low • Improper fluid level • O/D one-way clutch not operating properly STALL TEST [THIS IS FIGURE: A series of 5 circular diagrams showing stall test procedure, including gauges and a car on blocks, connected by arrows, labeled TEC047] TIME LAG TEST When the shift lever is shifted while the engine is idling, there will be a certain time elapse or lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, direct clutch and first and reverse brake. NOTICE: • Perform the test at normal operating fluid temperature (50 — 80°C or 122 — 176°F). • Be sure to allow one minute interval between tests. • Make three measurements and take the average value. MEASURE TIME LAG (a) Fully apply the parking brake. (b) Start the engine and check the idle speed. Idle speed: 7M-GE 700 rpm (N range) 7M-GTE 650 rpm (c) Shift the shift lever from N to D position. Using a stop watch, measure the time it takes from shifting the lever until the shock is felt. Time lag: Less than 1.2 seconds (d) In same manner, measure the time lag for N → R. Time lag: Less than 1.5 seconds