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Mountune USA

mountune Stage 1 Focus ST Gearbox Transmission

mountune Stage 1 Focus ST Gearbox Transmission


Regular price $5,899.00
Regular price $5,899.00 Sale price $5,899.00
Sale Sold out

Our Stage 1 Focus ST gearbox is a great solution for those looking to replace their tired and worn original gearbox.

We start with a brand new original Ford (Getrag) MMT6 gearbox, then each box is disassembled and inspected to ensure each part and component meets specifications. We then reassemble the gearbox with our carbon-lined upgraded synchros and steel-caged primary bearings. A Quaife ATB differential is added to ensure maximum traction and improved cornering.

Price is outright, no exchange is required, and because these are shipped assembled and ready to install, downtime with your vehicle is reduced.

Learn More about our Stage 1 MMT6 Gearbox Upgrade ]


Focus ST Stage 1 Gearbox Features:

  • Ready To Install
  • Professionally Assembled
  • Upgraded Steel-Caged Bearings
  • Upgraded Carbon-Lined Synchros
  • Quaife Limited-Slip ATB Included
  • Clutch Slave Cylinder Included
  • Optional Quick Shift Available
  • Optional WPC Surface Treatment Available


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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