4.CHECK INTERNAL TRANSMISSION
Repair internal transmission as necessary. Refer to the Service Information.
If there were any line pressure DTCs present along with this DTC, make sure to inspect the: Primary oil filter and
seal, Transmission Oil Pump, and the Main regulator valve per the Service Information.
If DTCs P0876 and/or P0875 were present in addition to the P0731, replace the Transmission Solenoid/TRS Assem-
bly in addition to necessary internal repairs.
Pay particular attention to the following list of possible causes when repairing the transmission:
Cut UD piston seal
Failed overrunning clutch
Cut UD accumulator seal ring
Broken UD accumulator piston
Low line pressure
Broken/missing main valve body bleed orifice
Broken/missing dribbler orifice assembly in reaction shaft support
Poor machining on pump valve body face
Transmission Solenoid/TRS Assembly
View repair
Repair
Repair internal transmission per the Service Information.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
stalled?
Ye s>>
Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If excessive clutch
debris is present, check the clutches for damage. Refer to the Service Information for the proper
hydraulic clutch repair procedure.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
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,
replace the Transmission Solenoid/TRS Assembly.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
7.CHECK IF THE DTC P0732 IS CURRENT
With the scan tool, perform the 2nd 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 2C clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 2nd gear
clutch test will not detect a faulty 2C clutch. However, it will detect a faulty UD clutch.
Did the clutch test pass, did the Input Speed remain at zero?
Ye s>>
Go To 8
No>>
Go To 10
8.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
Sensor Ground circuit.
Check the Speed Sensor wiring and connectors for good connection, then performawiggletestusingtheTrans-
mission Simulator, Miller tool #8333.
Were there any problems found?
Ye s>>
Repair as necessary.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Go To 9
9.CHECK FOR SLIPPAGE
With the scan tool, erase Transmission DTCs.
Road test the vehicle.
Is there an obvious slippage noticed in 2nd gear, or runaway on the 1–2 shift?
Ye s>>
Go To 12
No>>
Go To 15
14.CHECK FOR BROKEN REVERSE SUN GEAR WELD
Working through the windows in the bottom of the case, check for a broken Reverse Sun gear weld to the reaction
carrier as follows:
1) Hold the Transmission Output Shaft by holding the Transmission Manual Lever in the park position.
2) Rotate the Input Annulus gear and drive shell (the drum that encloses thetwo rearmost carriers).
3) Check to see if the reaction carrier (the front-most carrier, whose outer shell is splined to the 2C clutch) is rotat-
ing faster than the drive shell is being turned.
Is the reaction carrier turning faster than the drive shell?
Ye s>>
Replace Transmission Solenoid/TRS Assembly per the Service Information. (Refer to 21 - TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE/TRANS SOLENOID/TRS ASSY - REMOVAL)
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Replace the reaction carrier per the Service Information.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
15.CHECK IF DTC RESETS
Did the DTC P0732 reset during the road test?
Ye s>>
Go To 16
No>>
Go To 17
16.LIST OF POSSIBLE CAUSES
If any other DTCs set during the road test, refer to the appropriate symptomin the Transmission category.
If no other DTCs set during the road test, below is a list of possible causes,but not strictly limited to those:
Check for excessive debris in the Transmission Oil pan, plugged, cracked,or misinstalled Primary Transmis-
sion Oil Filter and/or seal.
Check for cut and/or missing #7 and #5 check balls in the main valve body.
Check the 2C and UD accumulator pistons and seals, UD bleed orifice, and theSolenoid Switch Valve and
Plugs in the main valve body.
Check the UD clutch piston seals, reaction shaft support seal rings and dribbler assembly.
Check the 2C clutch piston seals, and bleed orifice.
Check the main regulator valve for sticking in its bore and the flatness of the pump valve body and pump
housing faces.
Check for a improperly assembled 2C clutch with the thick reaction plate not against the case.
View repair
Repair
Repair as necessary. Refer to the Service Information for proper repair procedures.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
17.INTERMITTENT DTC
The conditions to set this DTC are not currently present.
With the scan tool, check the DTC EVENT DATA to help identify the conditionsin which the DTC was set.
If the DTC Event Data shows fault P0732 was set in Park, Reverse, or Neutral,replace the Powertrain Control
Module.
If the DTC Event Data shows fault P0732 set with input RPM = zero, check the input speed sensor and related
wiring.
If the DTC Event Data shows fault P0732 set with line pressure significantly below desired line pressure, check
for the cause of low line pressure (i.e., oil level, misinstalled or damaged primary filter or filter seal, sticking
main regulator valve in pump, etc.).
If the DTC Event Data shows fault P0732 set with the UD or 2C pressure switch open (but line pressure
matches Desired Line Pressure), air check the UD and 2C hydraulic clutch circuits for leakage per the Service
Information. If the UD and 2C hydraulic clutch circuits are OK, replace theTransmission Solenoid/TRS assem-
bly.
Check the gearshift linkage adjustment.
Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed
Sensor Ground circuit.
Remove the Ignition Switch Feed fuse from the TIPM.
CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being
startedingear.
WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in
personal injury or death.
Install Transmission Simulator, Miller tool #8333.
Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator.
Gear ratio DTCs can also be set under extreme temperature conditions.
Verify if the problem is only experienced under extreme hot or cold conditions.
Were there any problems found.
Ye s>>
Repair as necessary.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Te s t C o m p l e t e .
stalled?
Ye s>>
Repair the plugged, cracked, or split Primary Transmission Oil Filter and/or seal. If excessive clutch
debris is present, check the clutches for damage. Refer to the Service Information for the proper
hydraulic clutch repair procedure.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
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,
replace the Transmission Solenoid/TRS Assembly.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
7.CHECK IF DTC P0733 IS CURRENT
With the scan tool, perform the 3rd 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 OD clutch is faulty, the overrunning clutch will hold and the slip test will pass. The 3rd gear
clutch test will not detect a faulty OD clutch. However, it will detect a faulty UD clutch.
Did the clutch test pass, did the Input Speed remain at zero?
Ye s>>
Go To 8
No>>
Go To 10
8.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
Sensor Ground circuit.
Check the Speed Sensor wiring and connectors for good connection, then performawiggletestusingtheTrans-
mission Simulator, Miller tool #8333.
Were there any problems found?
Ye s>>
Repair as necessary.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Go To 9
9.CHECK FOR SLIPPAGE
With the scan tool, erase Transmission DTCs.
Road test the vehicle. Check operation in 3rd gear, 4th gear, and Reverse.
Is there an obvious slippage noticed in 3rd gear, or runaway on the 2-3 shift?
Ye s>>
Go To 12
No>>
Go To 16
18.CHECK FOR INTERMITTENT OPERATION
The conditions to set this DTC are not currently present.
With the scan tool, check the DTC EVENT DATA to help identify the conditionsin which the DTC was set.
If the DTC Event Data shows fault P0733 was set in the Park, Reverse, or Neutral, replace the Powertrain
Control Module.
If the DTC Event Data shows fault P0733 set with input RPM = zero, check the input speed sensor and related
wiring.
If the DTC Event Data shows fault P0733 set with line pressure significantly below desired line pressure, check
for the cause of low line pressure (i.e., oil level, misinstalled or damaged primary filter or filter seal, sticking
main regulator valve in pump, etc.).
If the DTC Event Data shows fault P0733 set with the OD or UD pressure switch open (but line pressure
matches Desired Line Pressure), air check the OD and UD hydraulic clutch circuits for leakage per the Service
Information. If the OD and UD hydraulic clutch circuits are OK, replace theTransmission Solenoid/TRS assem-
bly.
Check the gearshift linkage adjustment.
Intermittent Gear Ratio DTCs can be set by problems in the Input and Output Speed Sensor circuits and/or Speed
Sensor Ground circuit.
Remove the Ignition Switch Feed fuse from the TIPM.
CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being
startedingear.
WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in
personal injury or death.
Install the Transmission Simulator, Miller tool #8333.
Wiggle wiring and connectors while checking for intermittent operation with the Transmission Simulator.
Gear ratio DTCs can also be set under extreme temperature conditions.
Verify if the problem is only experienced under extreme hot or cold conditions.
Were there any problems found.
Ye s>>
Repair as necessary.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Te s t C o m p l e t e .
Diagnostic Test
1.CHECKFORRELATEDDTCS
With the scan tool, check for other transmission DTCs
If any of these DTCs are present, perform their respective tests first.
Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTCs present?
Ye s>>
Refer to the Transmission category and perform the appropriate symptom. If any of these DTCs are
present, they may cause a Speed Ratio Error. Perform the test for P0944 firstifitispresent.
No>>
Go To 2
2.CHECK DTC EVENT DATA
With the scan tool, read and record the DTC EVENT DATA.
NOTE: Make sure to record all DTC EVENT DATA stored in the scan tool for future reference in this test
procedure.
Does the DTC EVENT DATA display information for the DTC P0734?
Ye s>>
Go To 4
No>>
Go To 3
3.CHECK FOR ANOTHER DTC
In the DTC EVENT DATA recorded earlier, does the DTC EVENT DATA show the DTC P1790, with Target
Gear = 4th, or with both the 4C and OD clutches applying?
Ye s>>
Go To 4
No>>
Go To 6
4.CHECK INPUT RPM
In the DTC EVENT DATA recorded earlier, does the Input RPM read zero?
Ye s>>
Refer to the Transmission category and perform the diagnostic procedure for P0715 (Input Speed Sen-
sor Error). Diagnose the DTC as if it is set and current.
No>>
Go To 5
5.CHECK LINE PRESSURE READING
In the DTC EVENT DATA recorded earlier, is the line pressure reading more than 10 PSI below the desired
line pressure reading?
Ye s>>
Remove the Transmission Oil pan and check the Transmission Oil filter for improper installation or
plugged, if Primary oil filter is OK, check the main regulator valve in pump. If excessive debris is in the
oil pan, check clutches and repair as necessary. Refer to the Service Information for proper repair pro-
cedures.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Go To 6
Diagnostic Test
1.CHECKFORRELATEDDTCS
With the scan tool, check for other transmission DTC’s
If any of these DTCs are present, perform their respective tests first.
Are there any Transmission; solenoid, line pressure, speed sensor, and/or loss of prime DTCs present?
Ye s>>
Refer to the Transmission category and perform the appropriate symptom. If any of these DTCs are
present, they may cause a Speed Ratio Error. Perform the test for P0944 firstifitispresent.
No>>
Go To 2
2.CHECK DTC EVENT DATA
With the scan tool, read and record the DTC EVENT DATA.
NOTE: Make sure to record all DTC EVENT DATA stored in the scan tool for future reference in this test
procedure.
Does the DTC EVENT DATA display information for the DTC P0735?
Ye s>>
Go To 4
No>>
Go To 3
3.CHECK THE TARGET GEAR
In the DTC EVENT DATA recorded earlier, does the DTC EVENT DATA show the DTC P1790, with Target
gear = 5th, or with both the 2C and OD clutches applying?
Ye s>>
Go To 4
No>>
Go To 6
4.CHECK INPUT RPM
In the DTC EVENT DATA recorded earlier, does the Input RPM read zero?
Ye s>>
Refer to the Transmission category and perform the diagnostic procedure for P0715 (Input Speed Sen-
sor Error). Diagnose the DTC as if it is set and current.
No>>
Go To 5
5.CHECK LINE PRESSURE READING
In the DTC EVENT DATA recorded earlier, is the line pressure reading more than 10 PSI below the desired
line pressure reading?
Ye s>>
Remove the Transmission Oil pan and check the Transmission Oil filter for improper installation or
plugged, if Primary oil filter is OK, check the main regulator valve in pump. If excessive debris is in the
oil pan, check clutches and repair as necessary. Refer to the Service Information for proper repair pro-
cedures.
Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21- TRANSMIS-
SION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)
No>>
Go To 6