ATP Parts JO-57 Automatic Transmission Extension Housing Seal

Automatic Transmission Extension Housing Seal

ATP Parts JO-57 is an automatic transmission extension housing seal made as an exact-fit replacement for service work on a wide range of GM trucks, vans, SUVs, and select Bentley applications. It is specified without a boot and uses the listed dimensions for a direct match during transmission repair.

• Exact-fit replacement from ATP Parts
• Automatic transmission extension housing seal, without boot
• Width: 0.5625 in.
• Outer diameter: 2.9375 in.
• Inner diameter: 2.0625 in.
• Cross-references ATP JO-57 with SKF 18992 for the same application

Fitment Coverage

• Fits 2004-2006 Chevrolet Avalanche 2500, N/A
• Fits 2004-2006 Chevrolet Express 2500, N/A
• Fits 2004-2006 Chevrolet Express 3500, N/A
• Fits 2004-2006 Chevrolet Silverado 1500, N/A
• Fits 2005-2006 Chevrolet Silverado 1500 HD, N/A
• Fits 2004-2006 Chevrolet Silverado 2500 HD, N/A
• Fits 2004-2006 Chevrolet Silverado 3500, N/A
• Fits 2004-2006 Chevrolet Suburban 2500, N/A
• Fits 2004-2006 GMC Savana 2500, N/A
• Fits 2001-2006 GMC Savana 3500, N/A
• Fits 2005-2006 GMC Sierra 1500 HD, N/A
• Fits 2004-2006 GMC Sierra 2500 HD, N/A
• Fits 2004-2006 GMC Sierra 3500, N/A
• Fits 2004-2006 GMC Yukon XL 2500, N/A
• Fits 2004-2005 GMC Sierra 1500, N/A
• Fits 2001-2002 GMC Sierra 1500, N/A
• Fits 2004 Chevrolet Silverado 2500, N/A
• Fits 2004 GMC Sierra 2500, N/A
• Fits 1995-2000 Chevrolet C2500, N/A
• Fits 1995-2000 Chevrolet C3500, N/A
• Fits 1996-2000 Chevrolet Express 2500, N/A
• Fits 1996-2000 Chevrolet Express 3500, N/A
• Fits 1995-2000 Chevrolet K2500, N/A
• Fits 1995-2000 Chevrolet K3500, N/A
• Fits 1999-2000 Chevrolet Silverado 2500, N/A
• Fits 2000 Chevrolet Suburban 2500, N/A
• Fits 1995-2000 GMC C2500, N/A
• Fits 1995-2000 GMC C3500, N/A
• Fits 1995-2000 GMC K2500, N/A
• Fits 1995-2000 GMC K3500, N/A
• Fits 1996-2000 GMC Savana 2500, N/A
• Fits 1997-2000 GMC Savana 3500, N/A
• Fits 1999-2000 GMC Sierra 2500, N/A
• Fits 2000 GMC Yukon XL 2500, N/A
• Fits 1995-1999 Chevrolet C1500, N/A
• Fits 1995-1999 Chevrolet C1500 Suburban, N/A
• Fits 1995-1999 Chevrolet C2500 Suburban, N/A
• Fits 1995-1999 Chevrolet K1500, N/A
• Fits 1995-1999 Chevrolet K1500 Suburban, N/A
• Fits 1995-1999 Chevrolet K2500 Suburban, N/A
• Fits 1995-1999 Chevrolet P30, N/A
• Fits 1995-1999 Chevrolet Tahoe, N/A
• Fits 1995-1999 GMC C1500, N/A
• Fits 1995-1999 GMC C1500 Suburban, N/A
• Fits 1995-1999 GMC C2500 Suburban, N/A
• Fits 1995-1999 GMC K1500, N/A
• Fits 1995-1999 GMC K1500 Suburban, N/A
• Fits 1995-1999 GMC K2500 Suburban, N/A
• Fits 1995-1999 GMC P3500, N/A
• Fits 1993-1999 GMC Yukon, N/A
• Fits 1995-1996 Chevrolet G30, N/A
• Fits 1996 GMC Savana 1500, N/A
• Fits 1994 Chevrolet Blazer, N/A
• Fits 1992-1994 Chevrolet C1500, N/A
• Fits 1992-1994 Chevrolet C1500 Suburban, N/A
• Fits 1992-1994 Chevrolet C2500, N/A
• Fits 1992-1994 Chevrolet C2500 Suburban, N/A
• Fits 1992-1994 Chevrolet C3500, N/A
• Fits 1993-1994 Chevrolet G10, N/A
• Fits 1993-1994 Chevrolet G30, N/A
• Fits 1992-1994 Chevrolet K1500, N/A
• Fits 1992-1994 Chevrolet K1500 Suburban, N/A
• Fits 1992-1994 Chevrolet K2500, N/A
• Fits 1992-1994 Chevrolet K2500 Suburban, N/A
• Fits 1992-1994 Chevrolet K3500, N/A
• Fits 1992-1994 Chevrolet P30, N/A
• Fits 1992-1994 GMC C1500, N/A
• Fits 1993-1994 GMC C1500 Suburban, N/A
• Fits 1993-1994 GMC C2500, N/A
• Fits 1993-1994 GMC C2500 Suburban, N/A
• Fits 1993-1994 GMC C3500, N/A
• Fits 1993-1994 GMC G1500, N/A
• Fits 1993-1994 GMC G3500, N/A
• Fits 1993-1994 GMC K1500, N/A
• Fits 1993-1994 GMC K1500 Suburban, N/A
• Fits 1993-1994 GMC K2500, N/A
• Fits 1993-1994 GMC K2500 Suburban, N/A
• Fits 1993-1994 GMC K3500, N/A
• Fits 1993-1994 GMC P3500, N/A
• Fits 1992 Bentley Turbo R, N/A

What This Seal Helps Address

• Transmission fluid leakage at the extension housing
• Seepage around the output shaft area
• Seal wear from age, heat, and mileage
• Service replacement during transmission rebuild or repair
• Fitment issues when the original seal no longer holds properly

Installation Notes

Verify the seal dimensions before installation: 0.5625 in. width, 2.9375 in. outer diameter, and 2.0625 in. inner diameter. This JO-57 seal is specified without a boot, so confirm the original design on the vehicle before ordering. Clean the housing bore and shaft area thoroughly, and inspect the extension housing for wear or damage that could affect sealing performance.

Quality Assurance

ATP Parts lists this transmission seal as an exact-fit replacement part. The manufacturer description identifies it as a no-compromise replacement for transmission sealing service, and the part number JO-57 is supported by multiple cross-references in the aftermarket.