LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1533 (Automatic Transmission - 6-Speed POWERSHIFT Transmission - DPS6 6DCT250) >> Diagnosis And Testing >> Diagnosis By Symptom >> Symptom Chart(s) >> Symptom Chart: Automatic Transmission

Symptom Chart: Automatic Transmission

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

In most circumstances the PCM sets a DTC to help guide with diagnostics. Refer to the DTC Chart before using the Symptom Chart.

Condition Possible Sources Actions
No forward or reverse, stuck in neutral Brake pressure sensor
Corrupt TCM adaptive learn
Clutch motors
TR sensor
If DTC C0040:64 is retrieved, REFER to: Anti-Lock Brake System (ABS) And Stability Control . If any TCM DTCs are retrieved resolve them first. REFER to: Automatic Transmission . If no DTC is retrieved, INSPECT the TR sensor electrical connector and confirm the connector is seated and locked. REFER to: Transmission Control Module (TCM) Adaptive Learning . If concern still exists, GO to Pinpoint Test H. REFER to: Automatic Transmission .
No forward or no reverse gear TR sensor electrical connector
TR sensor
Clutch motors
If any TCM DTCs are retrieved resolve them first. REFER to: Automatic Transmission . If no DTC is retrieved, INSPECT the TR sensor electrical connector and confirm the connector is seated and locked. REFER to: Transmission Control Module (TCM) Adaptive Learning . INSPECT the electrical connectors for both clutch motors and confirm that the connectors are seated and locked. If concern still exists, GO to Pinpoint Test H. REFER to: Automatic Transmission .
Harsh or soft/delayed engagement or shifts Clutch adaptive learn REFER to: Transmission Control Module (TCM) Adaptive Learning .
Clutch REFER to: Clutch and Damper Unit .
Noise, vibration, or harshness (NVH) in 1st, 3rd, and/or 5th Clutch 1 REFER to: Clutch and Damper Unit .
Input shaft 1 REFER to: Transmission .
Clutch contamination REFER to: Clutch and Damper Unit .
Leaking inner and/or outer input shaft seal REFER to: Input Shaft Seal .
Noise, vibration, or harshness (NVH) in park, neutral, reverse, 2nd, 4th, and/or 6th Clutch 2 REFER to: Clutch and Damper Unit .
Input shaft 2 REFER to: Transmission .
Clutch contamination REFER to: Clutch and Damper Unit .
Leaking inner and/or outer input shaft seal REFER to: Input Shaft Seal .
Clicking, ticking, or grinding noise when shifting into any gear Clutch damage REFER to: Clutch and Damper Unit .
Clutch binding REFER to: Clutch and Damper Unit .
Worn or damaged synchronizers action REFER to: Transmission .
Clicking/ticking noise when shifting into 1st gear Worn or damaged synchronizer action REFER to: Transmission .
Grinding noise going into 5th gear Worn or damaged synchronizer action REFER to: Transmission .
Noise, vibration, or harshness (NVH) in all gears Differential REFER to: Transmission .
Worn, damaged or improperly installed intermediate shaft bearing or support REFER to: Front Drive Halfshafts .
First order engine vibration Clutch mis-alignment
Improperly torqued flexplate to clutch nuts
Improperly torqued flexplate to clutch nuts can cause a first order engine vibration. INSTALL new flexplate to clutch nuts and follow the tightening procedure in REFER to: Transmission - 2.0L Duratec-HE (125kW/170PS) - MI4 .
No Park / stuck in Park Selector lever cable adjustment REFER to: Selector Lever Cable Adjustment .
Park components REFER to: Transmission .
TCM software at the wrong level REFER to: Transmission Control Module (TCM) Adaptive Learning .
TCM voltage high REFER to: Charging System - System Operation and Component Description .
Connector or wiring issues Check for DTC.
Clutch adaptive learn REFER to: Transmission Control Module (TCM) Adaptive Learning .
Other concerns Selector lever high effort Selector lever cable routed wrong, binding or damaged. REFER to: External Controls .
No start/TR indicates R when selector lever is in P. Selector lever cable routed wrong, binding or damaged. REFER to: External Controls .
External fluid leaks Worn or damaged seals/gaskets
NOTE: The source of the leak must  be positively identified prior to repair.
REFER to: Special Testing Procedures . REFER to: Transmission Description - Overview . for seal location, repair or replace as necessary.
Clutch shudder on acceleration Clutch adaptive learn
Clutch contamination
GO to Pinpoint Test A 
Transmission overheat light on - stop safely Input shaft seal leaks
Engagement bearing
Clutch A and B actuator levers
Clutch unit
VERIFY that concern is present. RETRIEVE and RESOLVE any DTCs, REFER to the DTC, REFER to: Automatic Transmission . If no DTCs are present using a scan tool, PERFORM the IDS Clutch Routine. If concern still exists remove transmission and inspect the input shaft seal for leaks, inspect the engagement bearing, Clutch A and B actuators and clutch unit for contamination or damage. REFER to: Transmission - 2.0L Duratec-HE (125kW/170PS) - MI4 .
Rattle during light acceleration from a low speed in any given gear Clutch contamination
Clutch
Input shaft
Clutch actuators
Engagement bearing
VERIFY that concern is present. PERFORM a road test and attempt to duplicate the noise by COASTING in the gear of interest. Load the clutch by pressing lightly on the accelerator. If the noise is present and excessive, INSPECT the clutch for contamination. REFER to: Clutch and Damper Unit . If contaminated CLEAN as necessary. If no contamination is present PERFORM the TCM adaptive learn procedure. REFER to: Transmission Control Module (TCM) Adaptive Learning . If concern is still present, INSTALL a new clutch. REFER to: Clutch and Damper Unit .
Shudder or vibration focused on the driver seat area or steering wheel Clutch
Clutch contamination
Misaligned clutch
NOTE: New ("green") clutches may exhibit a temporary shudder during "break-in" period, it may diminish.
Start from a stop, release the brake pedal to allow vehicle to creep. Observe for excessive vibration in the seat, the floor, and/or steering wheel. Short duration of vibration may be acceptable. If the clutch is already broken in, check for any clutch-to-flex plate misalignment, loosen all clutch-to-flex plate fasteners and retorque all fasteners to specification REFER to: Transmission - 2.0L Duratec-HE (125kW/170PS) - MI4 . If the alignment is OK, INSTALL a new clutch. REFER to: Clutch and Damper Unit .
Coast down grinding noise Output shaft assembly
Shift fork
Shift drum overtravel
NOTE: This noise is best diagnosed when the vehicle engine temperature is cold and has sat for at least 3 hours or preferably overnight.
Drive the vehicle to a speed of 80 km/h (50 mph), then release the accelerator pedal and let the vehicle coast down to 32 km/h (20 mph). If excessive noise occurs, REFER to: Transmission Control Module (TCM) Adaptive Learning . If the concern is still present, Using a scan tool, CONFIRM that the shift drum angles are OK, REFER to: Specifications . If the concern is still present, REMOVE the output shaft and verify that the shift-fork-to-hub end clearance is OK. REFER to: Specifications . If OK, INSTALL a new output shaft and shift fork. REFER to: Transmission . If the shift-fork-to-hub end clearance is OK, CHECK the specific synchronizer ring clearance, REFER to: Specifications . If not OK, INSTALL a new respective output shaft. REFER to: Transmission .
Normal transmission noise -- Slight clicking sounds during a gear shift event, especially apparent when driving slowly with windows open and/or driving by a wall (building etc.) are normal noises. Drive normally at low speeds, first around a parking lot and then faster if needed. Coast down with or without braking from any speed to stop. Let vehicle downshift from 3rd-2nd gear or 2nd-1st gear. Listen to shift noise. This is normal auto-manual transmission shift noise, no repair is necessary.
Abnormal noise on gear shifts, clashing/grinding/ratcheting noise on a gear shift when driving. Most affected are shifts into gears 1, 3, 5 Shift fork-bushings
Shift drum A
Synchronizer ring clearance
TCM adaptive learn
Shift drum angles
Output shaft
Case to shift drum bushings
TCM
Driving normally, shift into the affected gear. Try upshifts with various throttle openings (usually in 15-35% range), and downshifts by decelerating the vehicle with various loads on the brake pedal. If the transmission noise during gear shifts is excessively loud, REFER to: Transmission Control Module (TCM) Adaptive Learning . If concern still exists, VERIFY shift drum angles are within specification for a specific gear selection. REFER to: Specifications . To aid diagnostic direction, REMOVE the transmission. REFER to: Transmission - 2.0L Duratec-HE (125kW/170PS) - MI4 . REMOVE the respective output shaft and verify that the shift-fork-to-hub end clearance is within specification for the specific gear selection and shaft, and measure synchronizer ring clearance. REFER to: Specifications . INSPECT the TCM clock and shift motor gears. If OK inspect all shift components and bushings. Replace any parts showing excessive wear or damage, or not within specification.
Abnormal noise on gear shifts, clashing/grinding/ratcheting noise on a gear shift when driving. Most affected are shifts into gears 2, 4, 6, R Shift fork
Shift drum B
Synchronizer ring clearance
TCM adaptive learn
Shift drum angles
Output shaft
Case to shift drum bushings
TCM
Driving normally, shift into the affected gear. Try upshifts with various throttle openings (usually in 15-35% range), and downshifts by decelerating the vehicle with various loads on the brake pedal. If the transmission noise during gear shifts is excessively loud, REFER to: Transmission Control Module (TCM) Adaptive Learning . If concern still exists, VERIFY shift drum angles are within specification for a specific gear selection. REFER to: Specifications . To aid diagnostic direction, REMOVE the transmission. REFER to: Transmission - 2.0L Duratec-HE (125kW/170PS) - MI4 . REMOVE the respective output shaft and verify that the shift-fork-to-hub end clearance is within specification for the specific gear selection and shaft, and measure synchronizer ring clearance. REFER to: Specifications . INSPECT the TCM clock and shift motor gears. If OK inspect all shift components and bushings. Replace any parts showing excessive wear or damage, or not within specification.