NO.20 NOISE/VIBRATION FORWARD OR REVERSE [5R55S]

• Transmission shift cable and bracket damaged or misadjusted.

• Digital transmission range (TR) sensor damaged

• Line pressure high/low

• Transmission oil cooler

• Torque converter

Note

• Before following the troubleshooting steps, make sure that the Automatic Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted.

(See BASIC INSPECTION [5R55S].)

STEP	INSPECTION	ACTION
1	FLUID • Does the following problem exist? • Improper level.	Yes	Adjust to proper level.
No	Go to Step 2.
2	SHIFT LINKAGES (INTERNAL/EXTERNAL) • Does the following problem exist? • Transmission shift cable and bracket damaged or misadjusted. Digital transmission range (TR) sensor damaged.	Yes	Inspect for damage. Readjust as required. Repair all damaged components. After repairing linkages, readjust the digital TR sensor. (See DIGITAL TRANSMISSION RANGE (TR) SENSOR REMOVAL/INSTALLATION [5R55S].)
No	Go to Step 3.
3	IMPROPER PRESSURES • Does the following problem exist? • Improper band/clutch application pressures, line pressure high/low.	Yes	Perform line pressure and stall speed tests. If pressure is high/low, check the pump assembly.
No	Go to Step 4.
4	PUMP ASSEMBLY • Do any of the following problems exist? • Internal leakage, cavitations. • Screws out of torque specification.	Yes	Inspect and repair as required. Tighten screws to specification.
No	Go to Step 5.
5	OVERDRIVE ONE-WAY CLUTCH ASSEMBLY • Does the following problem exist? • One-way clutch damaged, worn, misassembled.	Yes	Repair one-way clutch.
No	Go to step 6.
6	REAR ONE-WAY CLUTCH ASSEMBLY • Does the following problem exist? • One-way clutch damaged, worn, misassembled.	Yes	Repair one-way clutch.
No	Go to Step 7.
7	OTHER • Does the following problem exist? • Transmission oil cooler lines fill tube grounding.	Yes	Relocate transmission oil cooler lines or fill tube properly.
No	Go to Step 8.
8	GEAR • Does the following problem exist? • Gear noise.	Yes	Repair planetary gear assemblies.
No	Go to Step 9.
9	TORQUE CONVERTER CLUTCH ASSEMBLY • Does the following problem exist? • Torque converter internal malfunction preventing lockup piston application.	Yes	Go to symptom troubleshooting NO.16 “JUDDER UPON TORQUE CONVERTER CLUTCH (TCC) OPERATION”.
No	Go to symptom troubleshooting “SYMPTOM TROUBLESHOOTING ITEM TABLE”.
10	• Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If the malfunction remains, inspect the related Service Information and perform repair or diagnosis. • If the vehicle repaired, the troubleshooting is completed. • If the vehicle the not repaired or additional diagnostic information is not available, replace the TCM.

STEP

INSPECTION

ACTION

FLUID

• Does the following problem exist?

• Improper level.

Yes

Adjust to proper level.

Go to Step 2.

SHIFT LINKAGES (INTERNAL/EXTERNAL)

• Does the following problem exist?

• Transmission shift cable and bracket damaged or misadjusted. Digital transmission range (TR) sensor damaged.

Yes

Inspect for damage. Readjust as required.

Repair all damaged components.

After repairing linkages, readjust the digital TR sensor.

(See DIGITAL TRANSMISSION RANGE (TR) SENSOR REMOVAL/INSTALLATION [5R55S].)

Go to Step 3.

IMPROPER PRESSURES

• Does the following problem exist?

• Improper band/clutch application pressures, line pressure high/low.

Yes

Perform line pressure and stall speed tests.

If pressure is high/low, check the pump assembly.

Go to Step 4.

PUMP ASSEMBLY

• Do any of the following problems exist?

• Internal leakage, cavitations.

• Screws out of torque specification.

Yes

Inspect and repair as required.

Tighten screws to specification.

Go to Step 5.

OVERDRIVE ONE-WAY CLUTCH ASSEMBLY

• Does the following problem exist?

• One-way clutch damaged, worn, misassembled.

Yes

Repair one-way clutch.

Go to step 6.

REAR ONE-WAY CLUTCH ASSEMBLY

• Does the following problem exist?

• One-way clutch damaged, worn, misassembled.

Yes

Repair one-way clutch.

Go to Step 7.

OTHER

• Does the following problem exist?

• Transmission oil cooler lines fill tube grounding.

Yes

Relocate transmission oil cooler lines or fill tube properly.

Go to Step 8.

GEAR

• Does the following problem exist?

• Gear noise.

Yes

Repair planetary gear assemblies.

Go to Step 9.

TORQUE CONVERTER CLUTCH ASSEMBLY

• Does the following problem exist?

• Torque converter internal malfunction preventing lockup piston application.

Yes

Go to symptom troubleshooting NO.16 “JUDDER UPON TORQUE CONVERTER CLUTCH (TCC) OPERATION”.

Go to symptom troubleshooting “SYMPTOM TROUBLESHOOTING ITEM TABLE”.

• Verify test results.

― If normal, return to the diagnostic index to service any additional symptoms.

― If the malfunction remains, inspect the related Service Information and perform repair or diagnosis.

• If the vehicle repaired, the troubleshooting is completed.

• If the vehicle the not repaired or additional diagnostic information is not available, replace the TCM.

20	Noise/vibration forward or reverse
DESCRIPTION	• Transmission noisy in all positions and ranges.
POSSIBLE CAUSE	• Improper fluid level • Transmission shift cable and bracket damaged or misadjusted. • Digital transmission range (TR) sensor damaged • Line pressure high/low • One-way clutch • Transmission oil cooler • Gear • Torque converter Note • Before following the troubleshooting steps, make sure that the Automatic Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted. (See BASIC INSPECTION [5R55S].)