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5. If the underdrive clutch pressure is greater than 5 psi in Step 4 of Test Two-A, a defective solenoid/pressure switch assembly or controller is the cause. ALL PRESSURE SPECIFICATIONS ARE PSI (on hoist, with wheels free to turn) Gear Selector Position Actual Gear PRESSURE TAPS Under- drive Clutch Over- drive Clutch Reverse Clutch Torque Converter Clutch Off Torque Converter Clutch On 2/4 Clutch Low/ Reverse Clutch PARK - 0 mph * PARK 0-2 0-5 0-2 60-110 45-100 0-2 115- REVERSE - 0 mph REVERSE 0-2 0-7 165-235 50-100 35-85 0-2 165- NEUTRAL - 0 mph * NEUTRAL 0-2 0-5 0-2 60-110 45-100 0-2 115- Low - 20 mph # FIRST 110-145 0-5 0-2 60-110 45-100 0-2 115- Third - 30 mph # SECOND 110-145 0-5 0-2 60-110 45-100 115- 0-2 Third - 45 mph # DIRECT 75-95 75-95 0-2 60-90 45-80 0-2 0-2 OD - 30 mph # OVERDRIVE 0-2 75-95 0-2 60-90 45-80 75-95 0-2 OD - 50 mph # OVERDRIVE WITH 0-2 75-95 0-2 0-5 60-95 75-95 0-2 * Engine Speed at 1500 rpm # CAUTION: Both wheels must be turning at same speed. CLUTCH AIR PRESSURE TESTS Inoperative clutches can be located by substituting air To make air pressure tests, proceed as follows: NOTE: The compressed air supply must be free of 1. Remove oil pan and valve body. (Refer to 21 - TRANSMISSION/AUTOMATIC - 42RLE/VALVE BODY - REMOVAL) 2. Apply air pressure to the holes in the plates (1), one at a time. 3. Listen for the clutch to apply. It will give a slight thud sound. If a large amount of air is heard escap- 2/4 CLUTCH Apply air pressure to the feed hole located on the 2/4 clutch retainer (2). Look in the area where the 2/4 piston Air Pressure Test Plate 1 - AIR PRESSURE TEST PLATES 21 - 666 AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION LX |