S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
Seals and Gaskets: By Symptom
Technical Service Bulletin # 86-74-04
Date: 980901
Transfer Case - Low Fluid Level/Transfer Case Overfilled
File In Section: 7 - Transmission
Bulletin No.: 86-74-04
Date: September, 1998
Subject:
Low Transmission Fluid Level, Transfer Case Fluid Overfilled
(Replace Transfer Case Input Shaft Seal)
Models:
1996-98 Chevrolet and GMC K1-2, T1 Models
with NP231, NP233, NP241, NP243 Transfer Case (RPOs NP1, NP2)
Condition
Some owners may comment about a low transmission fluid level or that the transfer case fluid is overfilled. In some cases, there may be no external leaks
apparent. On vehicles equipped with an automatic transmission, some owners may comment about delayed engagement or transmission not shifting
properly.
Cause
The above conditions may be caused by a damaged transfer case input seal. This seal damage may allow transmission fluid to enter the transfer case.
Correction
Replace the transfer case input shaft seal and inspect the transfer case input gear for possible signs of damage such as roughness, scratches, or dents.
Also, inspect any seals taken from dealer inventory for signs of cut or damaged sealing lips. Verify that the transmission fluid and transfer case fluid are
at the proper levels. Correct as necessary. Refer to Section 4 - Driveline/Axle in the appropriate Service Manual. Use the part number listed below.
Parts Information
P/N
Description
Qty
14095609
Seal, Transfer Case Input Shaft
1
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
Description
Labor Time
Gasket, Transfer
Use published
K4250
Case to Adapter -
labor operation
Replace
time
Important:
Labor operation is coded to base vehicle coverage in the warranty system.
Technical Service Bulletin # 86-74-04
Date: 980901
Transfer Case - Low Fluid Level/Transfer Case Overfilled
File In Section: 7 - Transmission
Bulletin No.: 86-74-04
Date: September, 1998
Subject: