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P1736-GEAR RATIO ERROR IN 2ND PRIME (CONTINUED) 5. PLUGGED TRANSMISSION OIL FILTER Turn the ignition off to the lock position. Remove and inspect the Transmission Oil Pan for excessive debris per the Service Information. Remove and inspect the Primary Oil Filter per the Service Information. NOTE: Make sure the Primary Transmission Oil Filter and/or seal is not cracked or split. Does the Oil Pan contain excessive debris and/or is the Primary Oil Filter cracked or plugged? Yes >> Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If the Primary Trans- mission Oil Filter is plugged, refer to the Service Information for the proper hydraulic clutch repair pro- Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Remove the Transmission Oil Pump per the Service Information. Check the main Regulator Valve for sticking in its bore, scoring, and/or damage and clean and repair as necessary. If no problem is found, Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. 6. CHECK TO SEE IF DTC P1736 IS CURRENT With the scan tool, perform the 2nd Prime Gear Clutch Test. Follow the instructions on the scan tool. Increase the throttle angle, TPS Degree, to 30° for no more than a few seconds. CAUTION: Do not overheat the transmission. NOTE: If the 4C clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 2nd prime Did the clutch test pass, did the Input Speed remain at zero? Yes >> Go To 7 No >> Go To 9 7. CHECK FOR INTERMITTENT OPERATION Check the Shifter adjustment per the Service Information. Intermittent gear ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed Check the Speed Sensor wiring and connectors for good connection, then perform a wiggle test using the Trans- Were there any problems found? Yes >> Repair as necessary. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 8 8. CHECK FOR SLIPPAGE With the scan tool, erase Transmission DTCs. Road test the vehicle. Durning the road test, operate in 4th gear, and perform kickdown shifts from 4th to 2nd (prime) gear. Is there an obvious slippage noticed in 4th or 2nd prime gears, or runaway on the 4-2 shift? Yes >> Go To 11 No >> Go To 14 21 - 640 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS ND |