InMotion WS4577 Automatic Transmission Torque Converter Seal

Automatic Transmission Seal Overview

The InMotion WS4577 is an automatic transmission torque converter seal built to maintain a tight barrier against fluid loss and contamination. It uses polyacrylate construction and precise dimensions to support a secure fit in the specified applications.

Compatible With Buick Lucerne, Cadillac DTS, Cadillac DeVille, Cadillac Seville, Cadillac Eldorado, Cadillac Allante, Pontiac Bonneville, and Oldsmobile Aurora applications listed below, this seal is a direct service part for vehicles using the GMC 4T80-E transmission. The WS4577 part number is also useful when matching the correct seal during transmission service.

Key Features

• Polyacrylate material for sealing performance in transmission service.
• Precision sizing with 1.874 in. inside diameter and shaft diameter.
• 2.682 in. outside diameter and 2.676 in. housing bore for application matching.
• 0.41 in. thickness for a controlled seal profile.
• Designed for automatic transmission torque converter sealing applications.

Fitment Details

• Fits 2006-2011 Buick Lucerne, N/A.
• Fits 2006-2011 Cadillac DTS, N/A, with GMC 4T80-E Transmission.
• Fits 1994-2005 Cadillac DeVille, N/A, with GMC 4T80-E Transmission.
• Fits 2004-2005 Pontiac Bonneville, N/A, with GMC 4T80-E Transmission.
• Fits 1993-2004 Cadillac Seville, N/A, with GMC 4T80-E Transmission.
• Fits 2001-2003 Oldsmobile Aurora, N/A, with GMC 4T80-E Transmission.
• Fits 1995-1999 Oldsmobile Aurora, N/A, with GMC 4T80-E Transmission.
• Fits 1993-2002 Cadillac Eldorado, N/A, with GMC 4T80-E Transmission.
• Fits 1993 Cadillac Allante, N/A, with GMC 4T80-E Transmission.

What This Seal Helps Address

• Transmission fluid seepage at the torque converter seal area.
• Contamination entering sensitive internal transmission components.
• Seal wear that can lead to reduced fluid retention.
• Service replacement needs on vehicles with the GMC 4T80-E transmission.

Installation Notes

Verify the transmission type and seal dimensions before installation. Clean the sealing surfaces thoroughly and inspect the shaft and housing bore for wear or damage that could affect sealing performance. Confirm the WS4577 part number against the removed seal and application data before assembly.

Quality Assurance

InMotion manufactures this seal with precision and high-quality materials for transmission sealing service. The WS4577 is specified for the listed applications and dimensions to support proper fitment during repair.