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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1748 (Manual Transmission - GETRAG 5 Speed) >> Diagnostic Information and Procedures >> Transmission Noisy >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step inspects for vibration causing a noise. If the vehicle is carrying a certain load, the driveline axle may not be correct and could cause a vibration. The vibration may be resonating into the transaxle, causing a noise.
  2. 6:  This step inspects for the correct transaxle fluid level. If the transaxle fluid level is excessively low, damage may have occurred to the transaxle components.
  3. 8:  This step inspects for the correct type of transaxle fluid. The transaxle uses a special fluid. If the incorrect fluid was used, there may have been an overheating condition. Overheating may cause damage to the transaxle components.
  4. 10:  This step inspects for noise coming into the driver compartment. Improper sealing of the shift tower may be allowing normal transaxle noise to be heard by the driver.
  5. 14:  This step tests to determine if clutch components are making the noise. Depress the clutch pedal slowly and listen for the change in noise. If the noise changes while pressing the pedal, it may be a faulty clutch component. If the noise does not change until the clutch is completely disengaged, the transaxle component is faulty.
Transmission Noisy

Step Action Yes No
DEFINITION: The transaxle is making a noise. The different noises may be a whine or a growl from faulty bearings or gears. The noise may also be caused from a faulty component causing a vibration noise or rattle.
1 Did you review the Symptoms - Manual Transmission and perform the necessary inspections? Go to Step 2  Go to Symptoms - Manual Transmission 
2  Is the noise present at a certain speed or with a certain load? Go to Step 3  Go to Step 4 
3 Inspect for the correct driveline angle. Refer to Driveline Working Angles Measurement in Vibration Diagnosis and Correction.
Did you find and repair the condition?		 Go to Step 17  Go to Step 4 
4 Is the noise present in all gears? Go to Step 6  Go to Step 5 
5 Is the noise present in just one gear? Go to Step 16  Go to Step 6 
6  Inspect the transaxle fluid level.
Is the fluid level correct?		 Go to Step 8  Go to Step 7 
7 Add transaxle fluid. Refer to Transmission Fluid Replacement .
Did you find and repair the condition?		 Go to Step 17  Go to Step 8 
8  Inspect the transaxle for the correct fluid type. Refer to Lubrication Specifications .
Is the transaxle fluid the correct type?		 Go to Step 10  Go to Step 9 
9 Drain and fill the transaxle with the correct type fluid. Refer to Transmission Fluid Replacement .
Did you find and repair the condition?		 Go to Step 17  Go to Step 10 
10  Inspect the shift tower boot.
Is the closeout boot loose or damaged?		 Go to Step 11  Go to Step 12 
11 Position and tighten the shift tower boot to specifications. Refer to Shift Control Replacement .
Did you find and repair the condition?		 Go to Step 17  Go to Step 12 
12
  1. Inspect for engine to transaxle alignment.
  2. Inspect for loose transaxle mounting bolts.
Are there any loose transaxle mounting bolts?		 Go to Step 13  Go to Step 14 
13 Replace and tighten the transaxle mounting bolts. Refer to Transmission Replacement .
Is the noise still present?		 Go to Step 14  Go to Step 17 
14  With the engine operating, depress the clutch pedal.
Is the noise still present?		 Go to Step 15  Go to Step 16 
15
  1. Remove the clutch. Refer to Clutch Assembly Replacement in Clutch.
  2. Inspect the following components for being the cause of the noise:
    • The release bearing
    • The pilot bearing
    • The pressure plate
    • The clutch disc
    • The input shaft bearing
    • The engine crankshaft end play
Did you find and repair the condition?		 Go to Step 17  Go to Step 16 
16
  1. Remove the transaxle. Refer to Transmission Replacement .
  2. Disassemble the transaxle. Refer to Transaxle Case Disassemble . Use the information in the Cleaning and Inspection section to determine if any of the transaxle components are faulty.
Did you find and repair the condition?		 Go to Step 17  -
17 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 1 
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