The Rock Crusher is Back

The Rock Crusher is Back

To many GM enthusiasts, the Muncie M22 is the best four-speed the General ever made. Original M22s are hard to find, pricey, and often need a rebuild that will cost you even more. Fortunately, the driveline experts at Silver Sport Transmissions make brand new M22-style four-speeds that won’t break the bank. The Silver Sport M22 transmissions have the same legendary strength as the original Rock Crusher with modern upgrades like precision-machined gears; smooth, consistent shifting; and a 400 lbs.-ft. torque rating. And just like OEM, you can get them with either 10- or 26-spline input shafts.

Strength in Every Gear

Give your 2019-2023 Mustang GT the six-speed Ford should have installed from the start—a TREMEC Magnum XL Ford Kit Close Ratio Transmission. Based on TREMEC’s TR-6060, the Magnum XL replaces the breakage-prone factory Getrag MT-82 with a rugged transmission capable of handling up to 700 lbs.-ft. of torque. Its close ratio gearset will keep your Coyote in the heart of its powerband with less RPM drop between gears for quicker acceleration and better drivability. An extended tailhousing and direct-mount shifter provide shorter throws, and an integrated gear position sensor retains the oh-so-cool factory rev-matching functionality.