We sell parts for all Muncie designed transmissions. Please give us a call at 315-471-8141. In 2024 we will be introducing the Muncie Store where you can order spare and replacement parts directly without having to call us. Of course you can call us at any time; we would love to share our love of Muscle Cars with you.

Of course we can. You can either call us at 315-471-8141 or complete the EZ Spec Form at the bottom of the first page. Our Team can help you assess your current transmission, upgrade it or design a new one.

For many years, big American V8’s, with their awesome torque and wide power bands, were the envy of the automotive world. Often what impressed the enthusiasts and engineers was how little the cars they powered needed to shift. When did shifting become more important than driving? We’re not persuaded. More gears are better only when they’re needed and most of our customers cannot actually use more than four. That said, we agree that some racing or high speed road applications might benefit from five gears properly spaced.

For more than 25 years, our four speed gearing is supplied by the Italian firm Euroricambi and their A.M. Gears subsidiary (the near-legendary craftsmen of Antonio Masiero). All of castings are poured and machined in the United States. Our synchronizer rings, bearings, oilseals and small parts are supplied by leading name brand vendors worldwide. For us, quality and performance are the most important part of making the world’s best 4 speed.

If they were only that good we’d scrap them! Manufacturing advances such as CNC machining, diamond cutting tools, cleaner steels, and better control of heat treatment enable us to do things General Motors could only dream of doing in 1965. There was a saying then “If it’s to print it goes to service, if not, it goes to production”. That’s why we don’t ‘blueprint’ anymore. The Team at AutoGear have designed and build parts which far exceed the original designs with better materials, manufacturing processes and testing capabilities.

Every part that is made for our manual transmissions is manufactured on world-class equipment, We source to partners who continually invest in the best equipment and processes to assure that parts are made to our prints and specifications. All our gears, shafts and castings are controlled by AutoGear prints. Furthermore, wherever possible mating parts are sourced with a single vendor so there’s undivided responsibility that they run properly together.

The M20’s gear ratios work for drag and track applications — the wide spacing can help off the line depending on your setup. The limitation is gear strength. The M20 wasn’t built for the sustained stress of drag racing or strip use, and pushing it in that application puts the case and internals under load they weren’t designed to handle.

If drag use is your goal and you want the same ratio in a stronger package, the AutoGear M23 is worth the conversation.

Call 315-471-8141 or visit AutoGearSYR.com.

A 3.73 or 4.10 rear gear works well for street or moderate performance use. The right pairing depends on your full combination — engine torque curve, vehicle weight, tire height, and how you drive all factor in. A heavier car needs less rear gear to get moving; a lighter build can run tighter. When those pieces don’t line up, the whole drivetrain feels off.

Not sure what ratio fits your build? Call 315-471-8141 or visit AutoGearSYR.com.

The Muncie M20 is a wide-ratio four-speed with the following gear set: 2.52:1 first, 1.88:1 second, 1.46:1 third, and 1.00:1 fourth. The wide spacing between gears works well with the broad torque curves of American V8s, which is why the M20 has always been the right call for street driving, daily drivers, and period-correct muscle car restorations.

Additional ratio codes are available. Call 315-471-8141 or visit AutoGearSYR.com to find your match.

The M20’s gear ratios work for drag and track applications — the wide spacing can help off the line depending on your setup. The limitation is gear strength. The M20 wasn’t built for the sustained stress of drag racing or strip use, and pushing it in that application puts the case and internals under load they weren’t designed to handle.

If drag use is your goal and you want the same ratio in a stronger package, the AutoGear M23 is worth the conversation.

Call 315-471-8141 or visit AutoGearSYR.com.

A 3.73 or 4.10 rear gear works well for street or moderate performance use. The right pairing depends on your full combination — engine torque curve, vehicle weight, tire height, and how you drive all factor in. A heavier car needs less rear gear to get moving; a lighter build can run tighter. When those pieces don’t line up, the whole drivetrain feels off.

Not sure what ratio fits your build? Call 315-471-8141 or visit AutoGearSYR.com.

The Muncie M20 is a wide-ratio four-speed with the following gear set: 2.52:1 first, 1.88:1 second, 1.46:1 third, and 1.00:1 fourth. The wide spacing between gears works well with the broad torque curves of American V8s, which is why the M20 has always been the right call for street driving, daily drivers, and period-correct muscle car restorations.

Additional ratio codes are available. Call 315-471-8141 or visit AutoGearSYR.com to find your match.