ATP JO-57 Automatic Transmission Extension Housing Seal

The ATP JO-57 is a replacement automatic transmission extension housing seal designed to restore a leak-free connection at the rear of the transmission extension housing. This seal prevents transmission fluid from escaping where the driveshaft or output shaft exits the extension housing — a common wear point that, when compromised, can lead to fluid loss, drivetrain contamination, and costly damage. ATP engineers this seal as an exact-fit replacement, ensuring proper sealing without modification or trimming.

Key Features:

• Exact-fit replacement for the original transmission extension housing seal
• Designed to restore proper fluid retention at the transmission output
• No-compromise fitment — installs like the original equipment seal

ATP Transmission Seals and Gaskets are built to meet original equipment standards, making this a reliable choice for professional technicians and DIY mechanics alike. This seal covers a broad range of applications spanning model years 1965–2003, with fitment across Chevrolet, GMC, Jeep, Buick, Oldsmobile, Pontiac, Cadillac, and many other makes.