National 224215 Manual Transmission Extension Housing Seal

Manual Transmission Extension Housing Seal for Nissan

National 224215 is a manual transmission extension housing seal built for specific Nissan applications with Aichi R30A and R31A transmissions. It uses a polyacrylate sealing material and a counter-clockwise spiral lip design to help maintain a tight seal at the transmission extension housing.

With metric dimensions and OE-style sizing, this seal is specified for Nissan Frontier, Xterra, Pathfinder, 300ZX, Pickup, and D21 applications where the listed transmission match is required. National 224215 is a direct-fit sealing component for service work on the transmission tail housing area.

Key Features

• Manual transmission extension housing seal for transmission sealing service
• Polyacrylate sealing material for durability in transmission applications
• Counter-clockwise spiral lip design
• Inside diameter: 1.654 in. / 42.000 mm
• Outside diameter: 2.294 in. / 58.280 mm
• Width: 0.315 in. / 8.000 mm
• Housing bore: 2.283 in. / 58.000 mm
• National 224215 part number for accurate ordering and replacement

Detailed Description

National 224215 is a metric manual transmission extension housing seal engineered for the transmission tail housing area. The seal measures 42.000 mm inside diameter, 58.280 mm outside diameter, and 8.000 mm width, with a 58.000 mm housing bore specification. Its polyacrylate construction and spiral lip profile are used to support sealing performance in manual transmission service.

This part is listed for Nissan Frontier, Xterra, Pathfinder, 300ZX, Pickup, and D21 models with the correct Aichi R30A or R31A transmission application. Use National 224215 when replacing a worn extension housing seal on these Nissan manual transmission setups. This part cross-references Bosch 16511 for the same application.

What It Helps Fix

• Transmission fluid seepage at the extension housing
• Oil leakage around the tail shaft area
• Seal wear from age, heat, and mileage
• Contamination entering the transmission housing through a damaged seal
• Service issues caused by an incorrect or mismatched seal size

Installation Notes and Tips

Confirm the transmission code before ordering, since fitment depends on the Aichi R30A or R31A transmission listed for each vehicle. Verify shaft, housing bore, and seal dimensions against the original part during service. Clean the housing bore and shaft surface before installation, and inspect for scoring or wear that could affect sealing performance.

Fits 2016-2019 Nissan Frontier, N/A. Fits 2014-2015 Nissan Frontier, N/A, with Aichi R30A Transmission. Fits 1999-2012 Nissan Frontier, N/A, with Aichi R30A Transmission. Fits 2000-2004 Nissan Xterra, N/A, with Aichi R30A Transmission. Fits 1987-2002 Nissan Pathfinder, N/A, with Aichi R30A Transmission. Fits 1987-1996 Nissan 300ZX, N/A, with Aichi R31A Transmission. Fits 1995-1996 Nissan Pickup, N/A, with Aichi R30A Transmission. Fits 1986-1994 Nissan D21, N/A, with Aichi R30A Transmission.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern vehicle service needs. National 224215 is built to meet the dimensional and material requirements listed for the application.