GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

Yes

No

DEFINITION:

The transmission gears clash when shifting from one gear into another gear.

1

Check for low oil level in the transmission. Refer to Transmission Fluid Inspection or to Transmission Fluid Inspection .

Is the oil level OK?

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Go to Step 2

Go to Step 3

2

Check the transmission for improper lubricant. Refer to Lubrication Specifications .

Is the recommended lubricant being used?

--

Go to Step 5

Go to Step 4

3

Replenish the oil to the level of the oil fill plug.

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4

Drain and refill the transmission with the recommended lubricant.

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5

Check for proper clutch operation Refer to Preliminary Checks .

Is the clutch operating properly?

--

Go to Step 6

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6

  1. Remove the transmission. Refer to Transmission Removal or to Transmission Removal .
  2. Disassemble the transmission. Refer to Transmission Disassemble or to Transmission Disassemble .
  3. Look for the following list of causes:
  4. 3.1. Gearshift components worn or damaged.
    3.2. Synchronizer assemblies worn or damaged.
  5. Replace all worn or damaged parts.

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