National 710867 Automatic Transmission Oil Pump Seal - Front

Automatic Transmission Oil Pump Seal for GMC 5L40-E

National 710867 is an automatic transmission oil pump seal built for front-position applications that use the GMC 5L40-E and 5L50-E transmissions. It is designed with a clockwise-spiral lip profile and fluoro-elastomer sealing material to support a precise seal at the pump area in select BMW, Cadillac, Land Rover, Pontiac, and Saturn vehicles.

Key Features

• Part number: 710867
• Automatic transmission oil pump seal / oil seal
• Fluoro-elastomer sealing material for transmission fluid sealing
• Clockwise-spiral lip design
• Inside diameter: 1.750 in. / 44.450 mm
• Outside diameter: 2.764 in. / 70.200 mm
• Housing bore: 2.756 in. / 70.000 mm
• Overall width with side lip: 0.315 in. / 8.000 mm
• Fits front-position applications with GMC 5L40-E and 5L50-E transmissions

Detailed Description

National 710867 is engineered as a transmission pump seal for front-mounted applications where accurate sealing around the shaft and housing bore is critical. The fluoro-elastomer construction is selected for transmission environments, while the spiral lip design supports controlled sealing performance in rotating applications. This part number 710867 is listed for a wide range of import and luxury vehicles, including BMW 325i, BMW X5, Cadillac CTS, Cadillac SRX, Pontiac Solstice, and Saturn Sky applications with the specified transmission.

National has supplied sealing products for more than 75 years, and this seal reflects that focus on dimensional accuracy and modern sealing materials. This part cross-references ATP 102040 for the same application.

Vehicle Fitment

• Fits 2007-2010 Saturn Sky, front, with GMC 5L40-E Transmission
• Fits 2004-2009 Cadillac SRX, front, with GMC 5L40-E Transmission
• Fits 2008-2009 Pontiac G8, front, with GMC 5L40-E Transmission
• Fits 2006-2009 Pontiac Solstice, front, with GMC 5L40-E Transmission
• Fits 2003-2007 Cadillac CTS, front, with GMC 5L40-E Transmission
• Fits 2005-2007 Cadillac STS, front, with GMC 5L40-E Transmission
• Fits 2006 BMW 330Ci, front, with GMC 5L40-E Transmission
• Fits 2004-2006 BMW X3, front, with GMC 5L40-E Transmission
• Fits 2000-2006 BMW X5, front, with GMC 5L40-E Transmission
• Fits 2004-2006 Cadillac SRX, front, with GMC 5L50-E Transmission
• Fits 2005-2006 Cadillac STS, front, with GMC 5L50-E Transmission
• Fits 2004-2006 Cadillac XLR, front, with GMC 5L50-E Transmission
• Fits 2001-2005 BMW 325i, front, with GMC 5L40-E Transmission
• Fits 2003-2005 BMW Z4, front, with GMC 5L40-E Transmission
• Fits 2003-2005 Land Rover Range Rover, front, with GMC 5L40-E Transmission
• Fits 2001-2002 BMW Z3, front, with GMC 5L40-E Transmission
• Fits 1999-2000 BMW 323i, front, with GMC 5L40-E Transmission
• Fits 2000 BMW 328Ci, front, with GMC 5L40-E Transmission
• Fits 1999-2000 BMW 328i, front, with GMC 5L40-E Transmission
• Fits 2000 BMW 528i, front, with GMC 5L40-E Transmission

Common Uses

• Replacing a leaking automatic transmission oil pump seal
• Restoring sealing at the transmission pump area
• Addressing fluid seepage around the front of the transmission
• Repairing wear-related seal failure during transmission service
• Supporting proper fluid retention in GMC 5L40-E and 5L50-E applications

Installation Notes and Tips

Verify the transmission model, shaft diameter, housing bore, and seal dimensions before installation. Clean the pump bore and shaft surface thoroughly, and inspect for scoring or wear that could affect sealing. Use proper transmission service procedures and confirm the seal is seated evenly to avoid distortion during assembly.

Quality Assurance

National is known for sealing solutions backed by more than 75 years of industry experience. The 710867 seal uses fluoro-elastomer material and application-specific dimensions to support consistent fitment in the listed BMW, Cadillac, Land Rover, Pontiac, and Saturn vehicles.