National 331227H Automatic Transmission Oil Pump Seal - Front

Automatic Transmission Oil Pump Seal for Chrysler Applications

The National 331227H automatic transmission oil pump seal is built for Chrysler-based transmissions that require a precise front seal. With silicone sealing material and a clockwise-spiral lip design, it is specified for a wide range of Dodge, Jeep, Chrysler, Aston Martin, Land Rover, and Maserati applications.

Use this seal when servicing Chrysler A727, 46RH, 46RE, 47RH, 47RE, 48RE, 36RH, and 37RH transmission applications in vehicles such as Dodge Ram 2500, Dodge Ram 3500, and Jeep Grand Cherokee. National 331227H is engineered around the dimensions and sealing profile needed for front oil pump sealing service.

Key Features

• Part number: 331227H
• Automatic transmission oil pump seal for front installation
• Silicone sealing material for durable sealing performance
• Clockwise-spiral lip design
• Inside diameter: 1.875 in. / 47.630 mm
• Outside diameter: 2.628 in. / 66.750 mm
• Flanged outside diameter: 2.868 in. / 72.850 mm
• Thickness: 0.375 in. / 9.530 mm
• Housing bore: 2.624 in. / 66.650 mm
• National 330000 series oil seal

Detailed Description

National has supplied sealing solutions for more than 75 years, and the 331227H reflects that focus on dimensional accuracy and modern transmission service needs. This oil seal is listed as Type 33 and is designed with a silicone sealing element and clockwise-spiral lip to support front pump sealing in Chrysler automatic transmissions. The seal dimensions are matched to the specified shaft and housing bore measurements for proper fit during transmission repair.

This part cross-references ATP TO-8 and Wix 46392 for the same application. It is a direct service option for many Chrysler A727 and later Chrysler automatic transmission applications found in Dodge Ram 1500, Dodge Ram 2500, Dodge Ram 3500, Dodge Dakota, Jeep Cherokee, and Jeep Grand Cherokee models.

What This Seal Helps Address

• Front transmission fluid leakage at the oil pump seal area
• Seal wear from age, heat, and transmission fluid exposure
• Service replacement during transmission rebuilds
• Leak concerns on Chrysler A727, 46RH, 46RE, 47RH, 47RE, and 48RE applications
• Fitment-specific sealing needs on Dodge Ram and Jeep transmission service

Installation Notes and Tips

Confirm the transmission code before installation, since this seal is used across multiple Chrysler-family units and model-year combinations. Verify the shaft, housing bore, outside diameter, and thickness against the transmission being serviced. Clean the pump bore and sealing surface thoroughly, and inspect the shaft surface for wear or scoring before installing the new seal.

For fitment examples, this part fits 2003-2010 Dodge Ram 2500, front, with Chrysler 48RE Transmission; fits 2003-2007 Dodge Ram 3500, front, with Chrysler 47RE Transmission or Chrysler 48RE Transmission; and fits 1998-2003 Dodge Dakota, front, for Chrysler 46RE Automatic Transmission Oil Pump Seal service.

Quality Assurance

National is known for premium sealing solutions and continued product development for current and legacy vehicles. The 331227H is built as a precision transmission seal for service work where correct dimensions and sealing material matter.