Mcs / Front Pump (all) Mt640 / Mt643 / Mt650 / Mt653 (3.378" Od X 2.140" Id) (oem# 23045556)

Front Pump Seal for MT640, MT643, MT650, MT653 Automatic Transmissions

Restore a proper seal at the front pump with this direct-fit replacement from Precision International. Engineered to OEM dimensions of 3.378" outer diameter by 2.140" inner diameter, this seal stops fluid leaks and helps maintain correct line pressure in Allison-style medium-duty automatic transmissions. It is a reliable, cost-effective solution for rebuilders and repair shops working on MT640, MT643, MT650, and MT653 units.

Key Features

• Precision-fit seal sized at 3.378" OD x 2.140" ID for an exact front pump installation
• Meets or exceeds OEM specification 23045556 for dependable sealing performance
• Fluid-resistant construction helps prevent leaks and maintain hydraulic pressure
• Manufactured by Precision International, a trusted name in transmission repair parts
• Ideal for transmission rebuilds, reseals, and preventive maintenance service

Compatibility

This front pump seal is compatible with MT640, MT643, MT650, and MT653 automatic transmissions across various vehicle brands. It replaces OEM part number 23045556 and is designed for direct fitment in the listed applications. Please verify your transmission model and seal dimensions before ordering.

Why Choose This Part?

Choosing the right seal protects your transmission from fluid loss, pressure drops, and costly internal damage. Precision International delivers quality sealing components trusted by professional rebuilders. Confirm your fitment and order today to get your MT640, MT643, MT650, or MT653 transmission sealed and back on the road.