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.

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.

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4

Drain and refill the transmission with the recommended lubricant. Refer to Fluid Replacement .

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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 Replacement .
  2. Disassemble the transmission. Refer to Transmission Disassemble (NV4500) .
  3. Look for the following conditions:
  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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