Stall Speed Test
CAUTION:
DO NOT hold throttle open longer than 5 seconds to obtain steady gauge reading. After each stall test, move selector lever to "P" or "N" position and allow engine to idle lower than 1200 RPM for a minimum of one minute to cool engine and transaxle. If engine speed exceeds limits shown in STALL SPEED TEST SPECIFICATIONS
table, release accelerator immediately as clutch or band slippage is indicated.
NOTE:
Prior to testing, ensure throttle valve opens fully, engine oil, ATF, differential oil and coolant level is correct and ensure ATF temperature is at operating temperature of 140-176°F (60-80°C).
With engine at normal operating temperature, tachometer installed, wheels chocked and parking and service brakes applied, perform transaxle stall test with selector lever in "D", "2", and "R" position at full throttle and note maximum RPM obtained. Engine stall speed should be within limits. See STALL SPEED TEST SPECIFICATIONS table. If stall speeds are not within specification, check for the following conditions:
- If stall speed is less than specification in "2" or "R" position, throttle is not fully opened, engine performance is unsatisfactory or torque converter one-way clutch is slipping.
- If stall speed is greater than specification in "D" position, low clutch is slipping and/or one way clutch malfunctioning.
- If stall speed is greater than specification in "R" position, line pressure is too low, reverse clutch is slipping and/or low reverse brake is slipping.
- If stall speed is greater than specification in "2" position, line pressure is too low, low clutch is slipping and/or 2-4 brake is slipping.
STALL SPEED TEST SPECIFICATIONS
| Application | Stall RPM | |
|---|---|---|
| Forester | ||
| 2.2L | 2000-2500 | |
| 2.5L | 2100-2600 | |
| Impreza | 2100-2600 | |
| Legacy | ||
| Except Outback | 2100-2600 | |
| Outback | 2200-2700 | |