In 1990, Mark Williams Enterprises unveiled the industry’s first modular aluminum rear end based on the popular 9” Ford assembly. And through the years, M-W has added upgrades —including the use of 9.5” and 10” pitch diameter gears. Today, with the addition of some key components, it offers the “Ultimate” 9” Ford rear end assembly. The housing is manufactured from an aerospace alloy aluminum that’s 30% stronger than commonly used 6061. All CNC machining is done in-house at the M-W’s Louisville, Colorado facility.
The modular design incorporates a selection of end bells to determine the housing width. Mounts are available for both 4-link and solid installations and offered
with either flanged or full-floater axles. It is also available with steel tubes to facilitate street applications.
Mark Williams Enterprises is credited with introducing the industry’s first warranted forged steel axle back in the ‘70s, has upped the ante with their Ultimate Hi-Torque axles made of 300M material and backed by a 10-year warranty against breakage. The company has also greatly refined the pinion support, with the top-of-the-line offering boasting dual angular contact bearings with ceramic balls for a superior RPM rating.
Finishing the Ultimate assembly are special 10” pitch diameter ring & pinion gears that are a collaboration with Gleason Corp. Designed for ultra high horsepower applications, they are made from 9310 alloy, precision ground, shot-peened, REM micro-polished and sub-zero treated. For details visit www.MarkWilliams.com or call (800) 525-1963 for technical assistance.
