[23A] AUTOMATIC TRANSMISSION (FF) - - ON-VEHICLE SERVICE - TORQUE CONVERTER STALL TEST | PRINT PAGE / INDEX / PRIOR / NEXT

| TORQUE CONVERTER STALL TEST
| The purpose of this test is to measure the maximum engine speed when the torque converter stalls in D or R ranges in order to check the torque converter (Stator and one-way clutch operation) and the holding performance of the clutches and brakes which are built into the transmission. WARNING For safety, the front and rear of the vehicle should be kept clear of other people while this test is being carried out. Check the A/T fluid level, the A/T fluid temperature and the engine coolant temperature. A/T fluid level: HOT position on oil level gauge A/T fluid temperature: 70 - 80°C Engine coolant temperature: 80 - 100°C NOTE: The A/T fluid temperature is measured with MUT-II/III. Place wheel locks on both the left and right front wheels. Pull the parking brake lever to apply the parking brake and depress the brake pedal fully. Start the engine. CAUTION Do not keep the throttle fully open for any longer than 5 seconds. If you repeat the stall test when the A/T fluid temperature is greater than 80°C, move the selector lever to the N position and let the engine run at approximately 1,000 r/min for at least one minute. Wait until the A/T fluid temperature returns to 80°C or less. Move the selector lever to the D position, fully depress the accelerator pedal and quickly take a reading of the maximum engine speed at this time. Standard stalling engine speed: 2, 100 - 2, 600 r/min <4G63-SOHC> 3, 200 - 3, 700 r/min <4G63-DOHC> 2, 400 - 2, 900 r/min <4G64, 4G69> Move the selector lever to the R position and repeat the test described above. Standard stalling engine speed: 2, 100 - 2, 600 r/min <4G63-SOHC> 3, 200 - 3, 700 r/min <4G63-DOHC> 2, 400 - 2, 900 r/min <4G64, 4G69>
| TORQUE CONVERTER STALL TEST JUDGMENT RESULTS Stall speed is too high in both D and R ranges Malfunction of the torque converter (Slippage on the splines of the torque converter and the input shaft) Low line pressure Low-reverse brake slippage and malfunction of the one-way clutch Reduction brake slipping <5A/T> Stall speed is too high in D range only Underdrive clutch slippage Stall speed is too high in R range only Reverse clutch slippage Stall speed is too low in both D and R ranges Malfunction of the torque converter (Slippage of the one-way clutch) Low line pressure Poor engine output

[23A] AUTOMATIC TRANSMISSION (FF) - - ON-VEHICLE SERVICE - TORQUE CONVERTER STALL TEST | PRINT PAGE / INDEX / PRIOR / NEXT

©2004 Mitsubishi Motors Corporation