Stall Speed
Test
CAUTION:
• To prevent transmission damage, do not test stall speed for more than 10 seconds at a time.
• Do not shift the lever while raising the engine speed.
• Be sure to remove the pressure gauge before testing stall speed.
1. Engage the parking brake and block all four wheels.
2. Connect the tachometer, and start the engine.
3. After the engine has warmed up to normal operating temperature, shift into 121 position. 4. Fully depress the brake pedal and accelerator for 6 to 8 seconds, and note engine speed. 5. Allow 2 minutes for cooling, then repeat same test in 1 1 I, D4 and I R position.
NOTE:
• Stall speed test must be made only for checking the cause of trouble.
• Stall speed in I D4 , 121,111 and I R must be same, and must also be within limits.
Stall Speed RPM: rpm Specification: 2,600 rpm
Service Limit: 2,400-2,800 rpm
TROUBLE
| PROBABLE CAUSE
|
Stall rpm high in D4, 2, 1 and R position
| • Low fluid level or oil pump output • Clogged oil strainer • Pressure regulator valve stuck closed • Slipping clutch
|
Stall rpm high in 1 position
| • Slippage of 1st clutch, 1st-hold clutch or 1st gear oneway clutch
|
Stall rpm high in 2 position
| • Slippage of 2nd clutch.
|
Stall rpm high in D4 position
| • Slippage of 1st clutch, 1st gear one-way clutch
|
Stall rpm high in R position
| • Slippage of 4th clutch
|
Stall rpm low in D4, 2 1, R and position
| • Engine output low • Torque converter one-way clutch slipping
|