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3. UD CLUTCH CIRCUIT LEAKS IN THE VALVE BODY Turn the ignition off to the lock position. Remove the transmission oil pan and valve body per the Service Information. Check the condition of the UD accumulator springs. Look for possible leak paths into the UD clutch hydraulics circuit within the valve body. Were there any problems found? Yes >> Repair as necessary. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- No >> Go To 4 4. AIR CHECK UD CLUTCH CIRCUIT Perform an air check on the UD Clutch circuit per the Service Information. Watch and listen for UD Clutch piston movement. Air check all other pump passages for air leakage into the UD Clutch circuit. Were any problems found? Yes >> Repair internal transmission. Pay attention to components related to the UD clutch. Broken or weak return spring or a dislocated snap ring. If no trouble is found in UD clutch component or UD clutch Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- No >> Replace the Transmission/TRS Solenoid Assembly per the service information. With the scan tool, per- form Quick Learn. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- 5. VERIFY TCM OPERATION NOTE: The TRANS TEMP DEG must be at least 43° C or 110° F before performing the following steps. With the scan tool, record the clutch volume index (CVI) for all clutches. With the scan tool, perform a BATTERY DISCONNECT. With the scan tool, read the CVI’s and compare them to the readings recorded before the BATTERY DISCONNECT. Are any of the CVI’s less than 5 or different than before the BATTERY DISCONNECT? Yes >> Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMIS- No >> Test Complete. 21 - 668 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |