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Home >> Chevrolet >> 2009 >> HHR SS, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Manual Transmission - GETRAG 5 Speed) >> Diagnostic Information and Procedures >> Transmission Clunk on Acceleration or Deceleration >> Test Description

Test Description

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The number below refers to the step number on the diagnostic table.

  1. 5:  This step inspects the driveline components that may be the cause of the clunk noise. The noise may resonate to the transaxle.
Step Action Yes No
DEFINITION: A clunk is heard and/or felt on acceleration or deceleration.
1 Did you review the Symptoms - Manual Transmission  and perform the necessary inspections? Go to Step 2  Go to Symptoms - Manual Transmission 
2 Inspect the engine mounts for being loose or damaged. Refer to Engine Mount Inspection .
Did you find and repair the condition?
Go to Step 7  Go to Step 3 
3 Inspect the transaxle mounts for being loose or damaged. Refer to Transmission Rear Mount Replacement  or Transmission Mount Replacement - Left Side .
Did you find and repair the condition?
Go to Step 7  Go to Step 4 
4 Inspect the transaxle to engine fasteners for being loose or missing. Refer to Fastener Tightening Specifications .
Did you find and repair the condition?
Go to Step 7  Go to Step 5 
Inspect the driveline for causing the clunk. Refer to Clunk When Accelerating from Coast .
Did you find and repair the condition?
Go to Step 7  Go to Step 6 
6
  1. Remove the transaxle. Refer to Transmission Replacement .
  2. Disassemble the transaxle. Refer to Shimming Procedures .
  3. Inspect the following transaxle components that maybe causing the clunk:
    • Faulty mainshaft bearings
    • Faulty countershaft bearings
    • Worn speed gear teeth
    • Worn countershaft gear teeth
    • Worn synchronizer sleeve to hub
    • Worn thrust washers and thrust surfaces on the speed gears or mainshaft
Did you find and repair the condition?
Go to Step 7  Go to Diagnostic Aids
7 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 1