GM Service Manual Online
For 1990-2009 cars only

Checks

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DEFINITION: A few drops of lubricant that are leaking from the splined yoke are normal. This condition does not require attention.

The slip yoke barrel is burred, nicked, corroded, or worn.

  1. Inspect the slip yoke for burrs.
  2. Careful use of crocus cloth or fine stone honing can remove minor burrs.

  3. If the yoke is badly burred, corroded, or worn, replace the yoke. Refer to Rear Propeller Shaft Replacement .
  4. Replace the oil seal. Refer to one of the following procedures:
  5. •  Rear Output Shaft Seal Replacement in Transfer Case - BW 4481-NR3
    •  Rear Output Shaft Seal Replacement in Transfer Case - BW 4482-NR4
    •  Rear Output Shaft Seal Replacement in Transfer Case - NVG 246-NP8
    •  Propeller Shaft Front Slip Yoke Oil Seal Replacement in Automatic Transmission - 4L60-E

There is a faulty oil seal in the transmission or in the transfer case output shaft.

Replace the oil seal. Refer to one of the following procedures:

    •  Rear Output Shaft Seal Replacement in Transfer Case - BW 4481-NR3
    •  Rear Output Shaft Seal Replacement in Transfer Case - BW 4482-NR4
    •  Rear Output Shaft Seal Replacement in Transfer Case - NVG 246-NP8
    •  Propeller Shaft Front Slip Yoke Oil Seal Replacement in Automatic Transmission - 4L60-E