GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: The transmission does not sift smoothly or without difficulty into another gear.

1

Check the transmission for improper lucubration. Refer to Adhesives, Fluids, Lubricants, and Sealers.

Is the recommended Lubricant being used?

Go to Step 2

Go to Step 3

2

Check the transmission for loose shift lever housing bolts.

Are the bolts loose?

Go to Step 4

Go to Step 5

3

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

Does the transmission shift smoothly?

System OK

Go to Step 5

4

Align the component parts and tighten the fasteners. Refer to Fastener Tightening Specifications.

Does the transmission shift smoothly?

System OK

Go to Step 5

5

Check for proper clutch operation.

Was the clutch the cause of hard shifting?

System OK

Go to Step 6

6

  1. Remove the transmission. Refer to Transmission Replacement.
  2. Disassemble the transmission. Refer to Transmission Disassemble.
  3. Look for the following list of causes:
  4. • Binding shift rail.
    • Mispositioned shift selector arm roll pin.
    • Worn shift rail bores.
    • Distorted oil seal.
  5. Replace all worn or damaged parts.

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