SKF 16521 Manual Transmission Input Shaft Seal - Rear

SKF Rear Extension Seal for Automatic Transmissions

SKF 16521 is a transmission seal built for rear extension and output shaft sealing applications where fluid retention and contamination control matter. With a nitrile sealing surface and precise dimensions, it supports a secure seal in Chrysler, Dodge, and Jeep applications across a wide range of model years.

SKF’s A/T Trans Rear Extension Seal line reflects the brand’s long history in shaft seal engineering, with designs made to specific application requirements and premium materials selected for the operating environment. For drivers searching for a Dodge Charger rear transmission seal, Jeep Wrangler rear seal, or Chrysler 300 output shaft seal, SKF 16521 is a direct-fit service part for the listed vehicles.

Key Features

• Part number: 16521
• Brand line: A/T Trans Rear Extension Seal
• Sealing surface type: Nitrile
• Outside diameter: 2.452 in.
• Shaft diameter: 1.654 in.
• Width: 0.315 in.
• Built for rear extension and output shaft sealing applications
• Fits a broad range of Chrysler, Dodge, and Jeep models

Detailed Product Information

SKF 16521 is engineered as a manual transmission input shaft seal and is listed for automatic transmission rear extension and output shaft sealing applications in the fitment data. The seal dimensions and nitrile sealing surface help maintain a controlled barrier at the shaft interface, where transmission fluid loss and road contamination can lead to drivability and service issues. This part cross-references 52108428AA and 1172407 for the same application.

Fitment includes 2015-2020 Dodge Charger, rear extension seal applications; 2015-2020 Jeep Wrangler, rear; 2005-2014 Chrysler 300, rear; 2008-2014 Dodge Challenger, rear; and 2006-2014 Dodge Charger, rear. It also covers additional Dodge Dakota, Durango, Nitro, Ram 1500, Sprinter 2500, Sprinter 3500, Magnum, and Chrysler Crossfire applications listed in the vehicle table.

What This Seal Helps Address

• Transmission fluid seepage at the rear extension housing
• Contamination entering the shaft sealing area
• Wear-related sealing loss at the output shaft interface
• Service replacement needs on Chrysler, Dodge, and Jeep rear transmission applications
• Leak concerns after shaft or housing service

Installation Notes and Tips

Confirm the shaft diameter, outside diameter, and width before installation to match the application exactly. Inspect the shaft surface and housing bore for wear, scoring, or corrosion before fitting the new seal. For listed Dodge Charger and Jeep Wrangler applications, verify whether the vehicle uses the rear extension seal configuration shown in the fitment data, and follow the service procedure for the specific transmission.

Quality Assurance

SKF has a long history in seal design and manufacturing, with products built to specific application requirements and produced to high quality standards. The brand’s seal engineering focus is centered on keeping lubricants in and contaminants out, supporting long service life in demanding drivetrain environments.