Timken 472439 Manual Transmission Output Shaft Seal - Rear

Timken 472439 Manual Transmission Output Shaft Seal

The Timken 472439 manual transmission output shaft seal is built to help keep lubricant inside the transmission while blocking dirt and debris from entering the sealing area. It is a direct-fit service part for select Jeep rear applications, including Jeep CJ7, Cherokee, Scrambler, CJ5, J10, J20, and Wagoneer models.

Key Features

• Precision sealing design helps reduce lubricant loss at the output shaft
• Reinforced outer case helps resist installation damage and improve durability
• Ribbed rubber inner diameter helps seal minor spindle imperfections and promote seating
• Internal contamination exclusion system helps limit debris intrusion
• Vent holes allow lubricant flow around the seal lip to help manage heat buildup
• Cross-references National 472439 and Gates 18580, 18581 for the same application

Detailed Description

Timken 472439 is a manual transmission output shaft seal designed for rear-position Jeep applications where a reliable seal is needed at the transmission or transfer case output area. It is used in 1980-1986 Jeep CJ5, CJ7, Cherokee, Scrambler, J10, J20, and Wagoneer models, including 23-spline and 26-spline configurations listed in the fitment data. For Jeep CJ7 rear, Jeep Cherokee rear, and Jeep Scrambler rear service, this seal supports a proper sealing surface where lubricant retention and contamination control are critical.

What It Helps Address

• Transmission or transfer case fluid seepage at the output shaft
• Contamination entering the seal area from road debris
• Seal wear caused by minor shaft surface imperfections
• Heat buildup around the seal lip during operation
• Leak-related maintenance on rear Jeep drivetrain service points

Installation Notes and Tips

Inspect the shaft surface, housing bore, and surrounding components before installation. Clean the sealing area thoroughly and verify spline count and rear application details against the vehicle listing before service. Proper seating is important for sealing performance, so install the seal evenly to avoid distortion or damage to the outer case.

Quality Assurance

Timken oil and grease seals use precision sealing designs and contamination-control features to support dependable drivetrain service. The reinforced case and vented seal design are engineered to help maintain sealing performance in demanding manual transmission and transfer case applications.