ATP Parts TO-4 Automatic Transmission Oil Pump Seal - Front or Outer

Automatic Transmission Oil Pump Seal for Chrysler and Dodge

ATP Parts TO-4 is an automatic transmission oil pump seal made for exact-fit replacement in a wide range of Chrysler, Dodge, Jeep, Plymouth, and Mitsubishi applications. With precise dimensions and application-specific fitment, it supports a proper seal at the impeller hub position in many front-wheel-drive and rear-wheel-drive transmissions.

Key Features

• Automatic transmission oil pump seal for the impeller hub position
• Inside diameter: 1.6875 in.
• Outside diameter: 2.4375 in.
• Thickness: 0.375 in.
• Exact-fit replacement from ATP Parts
• Part number: TO-4

Detailed Description

ATP Parts TO-4 is built as a direct replacement transmission seal for vehicles across the Chrysler, Dodge, Jeep, Plymouth, and Mitsubishi lineup. ATP Transmission Seals and Gaskets are engineered as exact-fit replacement parts, helping restore the sealing surface at the automatic transmission oil pump and impeller hub area. This part cross-references National 331228H and Wix 33081 for the same application. Common search terms for this seal include Chrysler 300 transmission oil pump seal, Dodge Ram 1500 automatic transmission seal, and Jeep Wrangler impeller hub seal. The TO-4 part number is also used when sourcing a replacement for multiple transmission families and model years.

What This Part Helps Address

• Transmission fluid leakage at the oil pump seal area
• Seal wear at the impeller hub position
• Fluid loss that can affect transmission operation
• Service needs during transmission rebuild or overhaul
• Replacement of a damaged or hardened pump seal

Installation Notes and Tips

Verify transmission code, model year, and seal position before installation. This seal is listed for the impeller hub position, with some applications noting front or outer placement. Confirm the seal dimensions against the original part and inspect the pump bore and hub surface for wear, scoring, or contamination before assembly. Clean mating surfaces thoroughly and install using proper transmission service procedures.

Quality Assurance

ATP Parts supplies transmission seals and gaskets as exact-fit replacement components for service work where dimensional accuracy matters. The TO-4 is specified with defined inside diameter, outside diameter, and thickness measurements to support correct fitment across listed applications.