6XD-MTX 5-Spd Sequential “Mid-Engine” Transaxle w/Quick Change
The Ultimate Sequential “Mid-Engine” Transaxle
Our LATEST release; 6XD-MTX sequential Mid-Engine transaxle w/quick change rear, a high-performance drivetrain component specifically designed for mid-engine street cars, supercars, custom builds, and many other builds like the GT40, Ultima RS, Peregryn Motors, British supercar manufacturer Ultima Sports Ltd, RCR, Superformance, CAV, Tornado, Gelscoe Motorsport, Pathfinder GT40R, Porsche mid-engine conversions, Factory Five Racing GTM and more.
When you Compare the 6XD-MTX sequential Mid-Engine transaxle w/quick change rear against ANY traditional GT40 transaxles like the Ricardo, ZF gearboxes, Quaife, or any other unit on the market; you’ll never use anything else but 6XD Sequential for so many reasons!
Key Product Highlights
- High Torque Capacity: Designed and engineered to handle a massive torque load up to 2,000 ft-lbs, all while going through a Quick-Change rear section that can be changed in minutes.
- Advanced Machining: Features a 10.4-inch ring and pinion gear, precision-machined on a 5-axis CNC using diamond bits for superior durability and no deflection design over standard grinding.
- Integrated Cooling: A serviceable internal oil pump with dual dry-sump style screens delivers constant, direct pressure lubrication to all internal bearings and gears through machined gallies.
- Universal Adaptability: Our billet modular front plates bolt directly to virtually any engine or the use of our custom billet aluminum bellhousings can complete any custom build.
- Quick-Change Rear: Shares the exact physical footprint of existing market-standard GT40 transaxles but adds an easily accessible quick-change rear. This allows owners to change the final drive ratio in minutes, switching between a highway cruising gear ratio and track-ready gearing.
6XD-MTX Sequential Transaxle Key Performance Advantages
Feature
Technical Benefit
Real-World Impact
Sequential Barrel
Eliminates the chance of a “money shift” (missed gear).
Shifts take less than 40 milliseconds.
Drop-Gear Design
Changes final drive ratios without dismantling the entire transaxle.
Gearing can be changed in minutes, or from Highway cruising use to Track day event use.
Straight-Cut Gear
Removes axial thrust forces inherent to helical gears. Less drag, Stronger
Handles up to 2,000 lb-ft of torque reliably.
Integrated Trans & Diff Design
Eliminates the intermediate driveshaft entirely.
Maximizes packaging efficiency and reduces drivetrain loss. Overall stronger package.
Included with the 6XD-MTX 5-Spd Sequential “Mid-Engine” Transaxle
Transmission/Rear Differential
- 6XD-MTX sequential transaxle 5-speed can have One or multiple Over-Drives or even no OD ratios!
- Billet Alum Mounting plate for Almost any engine package, or if needed a billet Alum bell housing (additional cost), MTX units include an integrated QM or Tilton TOB assy.
- 300M input shaft GM 26 spline, currently two lengths available.
- Custom length input shafts are available at additional cost; adds 8 weeks to lead time.
- CV output flanges can be either 930 spec or larger 934 spec, client’s choice.
- One drop gear set of your choice for the final drive in rear Quick-Change section
Shifter and Electronics
- Two Mil-Spec Wiring Harnesses, plug-and-play harnesses for the gear display and reverse/neutral lockout, utilizing terminated eyelets for secure positive and negative connections.
- Billet Alum Gear Display, premium black anodized billet aluminum display equipped with terminated DTM connectors.
- Rotating Shifter Handle Features full 360-degree rotational adjustment to guarantee perfect driver ergonomics.
- 1″ diameter straight Carbon Handle, or offsets available in 2-inch, 3-inch, and 5-inch, all hydro dipped with carbon fiber finish.
- Remote Billet Alum Shifter Assy, precision-machined remote shifter prepped for a single Morse control cable. (Shift cables are not supplied, as cable lengths vary wildly by chassis).
- Additional Option: include a load cell and/or “Xineering” Stand-Alone gear control unit (GCU) for wide-open-throttle (WOT) and throttle-blip (BLIP) clutch-less shifting functionality, 99% of all clients use this pkg for amazing smooth fast shifting.
- These options allow you to further customize the drivetrain to suit your performance goals and control-system requirements.
Oil Cooling and Ventilation
- 24-row transmission oil cooler with -8 AN male hose fittings.
- One billet vent can for the transmission with -8 AN male fitting.
Clutch Options and Performance Upgrades
The 6XD-MTX package can be configured with a suitable OEM-style clutch or upgraded with an aftermarket performance clutch and flywheel packages.
We are world dealers for Tilton, ACT performance and RPS clutches and can help you select the right combination based on your power level, driving style, and intended use, and at lower pricing.
Technical Specifications
6XD-MTX Sequential Transaxle
Strongest Sequential Transaxle in the world rated 2000 ft lbs.
- 5-speed version: 254 lbs.
- Transmission gear ratios: More than 200 options available
- Oil capacity: 3 quarts, plus additional capacity for the oil cooler and lines
- Suggested oil: Highly suggested to use 6XD 75/140 FS oil, we have seen the BEST results with this oil in the past 3 yrs, No pitting, No scuffing, No heat buildup.
- It is Highly suggested to use 6XD 75/140 FS oil, In stock $31-quart
- * 6XD is more likely to stand behind any issues ONLY if our 6XD Oil is used *
2027 Package and Options Pricing
rated for 2,000 ft-lbs.
signals ECU
Complete Custom Billet Aluminum Bellhousing
$1,600
Colors: Black – Red – Blue – Gold – Purple – Green
We are World Dealers for Tilton and ACT; we can provide better pricing for you than others.
* Discounted pricing / BULK orders (2+) On the same order *
Order Process and Lead Times
Typical Lead Time
Our typical lead time is 2-4 weeks before shipment, provided we have received your completed 6XD configuration sheet and all required order information.
To configure your drivetrain correctly, we require information including:
- Engine specifications and power goals.
- Tire size and relevant vehicle configuration details.
- Driving application. Drifting / Road racing / Street n Strip / Street / Roll Racing
- Transmission and gearing preferences.
- Shipping address and order information.
Accurate information helps us configure your transmission ratios and final-drive gearing to suit your specific build.
Lead times may vary depending on configuration, selected upgrades, and component availability.
Deposit Requirements
Available payment methods:
- Credit card: Payment link available; 3 to 4.5% (Amex) processing fees apply.
- ACH transfer: Payment link available; No fees.
- Bank wire transfer: No fees.
Remaining Balance
The remaining balance is due during the week your order is scheduled to ship.
* PLEASE email questions or to place ANY ORDER: 6xdgearbox@gmail.com
6XD has been the “Highest Ranked Customer Service” in the industry for the past 6 years!
Let us help you configure YOUR 6XD-MTX Sequential Transaxle build for ANY desired use!
Whether you’re building a high-performance street Mid-Engine car, or a dedicated track car, or a serious competition vehicle, the 6XD sequential units offer an extensive range of transmission ratios, final-drive options, and performance upgrades.
From the 6XD Standard to the upgraded 6XDX package to our 6XD-MTX transaxle, we can help you select the appropriate transmission, gearing, clutch, and supporting components for your application.
Contact us today to start your 6XD configuration.
Provide your engine specifications, tire size, intended use, and vehicle details, and we’ll help you build a drivetrain package tailored to your goals.
Contact Us
6XD GEARBOX