1975 Mercury Grand Marquis Differential Ring and Pinion - Rear Richmond

For Ford 9"; 4.57 Ratio; Pro Gear; Big Pinion; Dual Drilled for 1/2" and 7/16" Ring Gear Bolts

Differential Ring and Pinion

For over 80 years, the Double Diamond has signified Richmond the highest quality gears in the industry! Our broad selection of ring-and-pinion ratios, transmissions, and lightened gears is available for just about every vehicle made from the 1940s through and including new vehicles. DIY customers and professional installers alike will appreciate our installation kits, which come complete with everything needed to install a ring-and-pinion set; right down to the seals, gaskets, and RTV. Consistent gears are VERY important to installers. Once a mechanic successfully installs their first Richmond gearset, they will know how to setup all future Richmond gears. Richmond performance products are the result of continuous research and development combined with the state-of-the-art manufacturing in our facilities worldwide.

Racecars around the world rely on Richmond premium gearsets and transmissions; your hotrod will run better than new with Richmond. We are proud to offer an unmatched selection of premium ring-and-pinion sets and transmission components engineered manufactured to improve your vehicle’s performance. Richmond premium products are engineered to meet or exceed OEM specifications at a great value. Richmond ring and pinion gearsets are computer-controlled manufactured from the foundry, to cutting gears at 1,000th of an inch precision, to heat-treating the finished product. This consistently provides some of the strongest gears possible.

Richmond’s “bulletproofâ€쳌 transmissions are packed with power and speed. Their superior quality is a result of constant research, development, and extensive testing at our state-of-the-art facilities. Outstanding engineering design has made the Double Diamond gearing the winner at the track and on the street. Richmond drivers demand quality in their winning performances. Quality that is built into every transmission and gear set that carries the Richmond name.

Richmond Gear Performance products are engineered to endure extreme punishment in dedicated racing vehicles operating in the harshest environments. Throw your worst at our parts, Richmond® gearsets and transmissions can take it. Engineered to perform in under harsh race conditions, for decades our products have been essential to winners at both the Daytona 500 and the U.S. Nationals.

All Richmond performance products meet strict quality standards through advanced manufacturing techniques and are backed by a strong warranty. Our in-house quality control lab utilizes state-of-the-art equipment to continuously check Richmond products for strength, tolerance, and hardness. Only after meeting stringent quality standards are Richmond products stamped with the Double Diamond seal of approval, ready for fast delivery to our customers.