Mcs / Front Pump (all) Mt640 / Mt643 / Mt650 / Mt653 (3.885" Od X 3.140" Id) (75-93) (oem# 23016643)

Front Pump Seal for MT640 / MT643 / MT650 / MT653 Automatic Transmissions (1975-1993)

Restore a leak-free seal between your transmission front pump and torque converter with this direct-fit replacement seal from Precision International. Engineered to meet or exceed original equipment specifications, this seal is sized at 3.885" outer diameter by 3.140" inner diameter for a precise fit on Allison MT-series automatic transmissions.

Key Features

• Precision-manufactured by Precision International to OEM dimensions
• Measures 3.885" OD x 3.140" ID for exact front pump fitment
• Replaces OEM part number 23016643
• Durable sealing material resists heat, pressure, and automatic transmission fluid
• Direct-fit design for straightforward installation during pump service or rebuild

Compatibility

This front pump seal fits Allison MT640, MT643, MT650, and MT653 automatic transmissions from model years 1975 through 1993. It is compatible with vehicles equipped with these transmissions and cross-references OEM part number 23016643.

Why Choose This Part?

Choosing a Precision International seal means you get a component built specifically for the demands of heavy-duty automatic transmissions, helping prevent fluid leaks and costly pump damage. If you are servicing an Allison MT-series transmission, this seal delivers the reliable sealing performance you need. Order today and get your transmission sealed right the first time.