PI1217
Service Bulletin Details
Public Details for: PI1217
This preliminary bulletin provides a way to aid the technician in diagnosing transmission fluid leaking from the trans breather vent.
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File in Section: Service Bulletin Bulletin No.: Date: PI1217 April, 2014 PRELIMINARY INFORMATION Subject: Diagnostic Tips for Transmission Fluid Leaking from Vent After Installing a Remanufactured Transmission or Valve Body Models: 1997-1999 Buick Riviera 1997-2004 Buick Regal 1997-2005 Buick Century, LeSabre, Park Avenue 2002-2007 Buick Rendezvous 2005-2007 Buick Terraza 2005-2009 Buick LaCrosse (Allure in Canada) 2006-2011 Buick Lucerne 1997-2001 Chevrolet Lumina 1997-2007 Chevrolet Monte Carlo 1999-2005 Chevrolet Venture 2001-2011 Chevrolet Impala 2005-2008 Chevrolet Uplander 2006-2007 Chevrolet Malibu 1997 Oldsmobile Cutlass Supreme 1997-1999 Oldsmobile Aurora, 88 1998-2002 Oldsmobile Intrigue 1999-2002 Oldsmobile Silhouette 2001-2002 Oldsmobile Aurora 1997-2005 Pontiac Bonneville 1997-2008 Pontiac Grand Prix 1998 Pontiac Transport 1999-2008 Pontiac Montana 2001-2005 Pontiac Aztek 2006-2009 Pontiac G6 2005-2007 Saturn Relay Equipped with 4T65 Automatic Transmission (RPO M15, MN7, MN3, M76 or MD7) Condition/Concern Some customers or technicians may comment on transmission fluid leaking from the vent after installing a remanufactured transmission or valve body. This condition may be caused by a worn, oversized pressure regulator valve bore in the valve body causing line pressure to leak into the exhausted port just under the transmission vent. Recommendation/Instructions If transmission fluid is encountered, please inspect the transmission for the following conditions: 1. Transmission fluid level overfilled. Refer to Transmission Fluid Level and Condition Check in SI. 2. Incorrect fluid level indicator. 3. Water or coolant in the fluid (fluid may appear milky in color). 4. Plugged or damaged vent. 5. Transmission case porous in the area of the vent. 6. Case cover assembly (Channel Plate) not torqued properly. 7. Case cover assembly gasket installed incorrectly. Note: If the cause of the fluid leak was not found after performing the inspection listed above, replace the valve body.