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Ford MMT6 Gearbox Transmission Service and Upgrade - Focus ST

Ford MMT6 Gearbox Transmission Service and Upgrade - Focus ST


Regular price $1,939.10
Regular price $1,998.00 Sale price $1,939.10
Sale Sold out

Our Ford MMT6 Gearbox service and upgrade for the Focus ST transmissions replace the fragile factory components with our upgraded synchros and countershaft bearing.

Upon receiving your used MMT6 gearbox from your Focus ST our experienced technicians will conduct a full teardown of your transmission, and perform a motorsport-grade cleaning of your gearbox and components.

We then inspect each gear, synchro, shift fork, bearing, and shaft to ensure serviceability prior to reassembly. If any parts are found to be worn or damaged and not serviceable, we will contact you and provide a quote to replace the necessary components.

Your gearbox will then be professionally rebuilt in-house with our upgraded carbon-lined synchros and steel-caged bearings ensuring accurate selection when going through the gears, even under hard acceleration.

The transmission will then be shipped back to you fully assembled and ready to install.

[ Learn More About Our MMT6 Gearbox Transmission Service & Upgrade ]


We highly recommend using Motul Multi-DCTF Dual Clutch Transmission Fluid in our Stage 1 gearbox transmissions for the best performance.
Note: Two 1-Liter bottles Required

Return Policy

You have 7 calendar days to return an item from the date you received it. To be eligible for a return, your item must be unused and in the same condition that you received it. Your item must be sealed in the original packaging. Your item needs to have a receipt or proof of purchase. Some exclusions apply.

For additional details see our Return & Refund Policy.

Installation Guides

To see all available installation and break-in instructions, click here.

Disclaimers & Legal

This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.

Click Here for emissions compliance information.

California Residents Prop 65 Information
California’s Proposition 65 entitles California consumers to special warnings for products that contain chemicals known to the state of California to cause cancer and birth defects or other reproductive harm if those products expose consumers to such chemicals above certain threshold levels. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information visit

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