Note: Expect a project advisor to reach out to you after your order to confirm your VIN and fitment details. All transmission builds are VIN-matched to guarantee fitment. Standard lead time is 30 days, although often faster. If you are in a rush, please contact us to confirm timelines before ordering.
Table of Contents:
1. Our Commitment to Engineer Excellence
2. 30-Day 100% Risk-Free Guarantee
3. No Time Limit Free Core Returns
4. Do You Need Fast & Easy Financing?
5. Built Aisin Seiki AS69RC Transmission w/ Billet Torque Converter Build Specifications
6. 2 Year/Unlimited Mileage No-Fault Warranty System
7. Popular Transmission Information Resources
1. Our Commitment to Engineer Excellence
At Next Gen Drivetrain, building a transmission is about more than simply making it survive. The goal is to engineer a drivetrain that delivers the kind of crisp, responsive shifting enthusiasts want while maintaining the durability and reliability required for everyday use, towing, performance driving, and high-horsepower applications. Every transmission is approached with the philosophy that customers should not have to choose between great shift quality and long-term dependability.
That philosophy starts with understanding how a transmission actually fails. Instead of simply replacing worn components with factory-style parts, Next Gen Drivetrain studies the weaknesses of the original design and looks for opportunities to improve them. Valve body operation, hydraulic pressure, clutch capacity, sealing, lubrication, heat management, and internal component strength can all play an important role in how a transmission performs and how long it lasts.
Shift quality is especially important. A transmission that shifts too softly can generate excessive clutch slip and heat, while a transmission that shifts unnecessarily harshly can make a vehicle unpleasant to drive and place additional stress on drivetrain components. Next Gen Drivetrain works to achieve the right balance: fast, positive, controlled shifts that feel performance-oriented without sacrificing drivability.
That balance comes from carefully engineered combinations of hydraulic modifications, upgraded components, precision machining, improved clutch capacity, and application-specific calibration strategies. The objective is not simply to make shifts harder. It is to improve the transmission’s ability to apply clutches quickly and consistently so power is transferred efficiently from the engine to the wheels.
Reliability is engineered into the transmission at the same time. Whenever possible, known weak points are addressed before they become problems. Depending on the transmission platform and application, this may include upgraded clutch packs, improved valve body components, stronger internal hardware, better sealing solutions, revised hydraulic circuits, or other proprietary modifications developed specifically to correct common failure points.
Manufacturing quality is equally important. A high-performance transmission is only as good as the precision used to assemble it. Clearances, tolerances, clutch setup, hydraulic operation, and component condition all have to work together. Attention to these details helps produce consistent performance from one transmission to the next.
The result is the type of transmission Next Gen Drivetrain strives to build every day: one that shifts quickly and confidently when the throttle is down, remains smooth and predictable during normal driving, and is engineered to handle demanding conditions for the long haul.
For performance enthusiasts, truck owners, racers, and anyone who depends on their vehicle, that combination matters. Horsepower means very little if the transmission cannot reliably transfer it.
Next Gen Drivetrain’s mission is simple: engineer and manufacture transmissions that deliver exceptional shift quality without compromising reliability. By combining real-world experience, precision manufacturing, thoughtful engineering, and solutions for known factory weaknesses, Next Gen Drivetrain builds transmissions designed not only to perform better—but to stay performing better.
2. 30-Day 100% Risk-Free Guarantee
If you are not 100% satisfied with your Next Gen Drivetrain transmission, you have 30 days from the date of delivery to return it to us for a full refund, even if it’s been used. We truly believe we’ve engineered the best transmission on the market for the Allison 10-Speed transmission, and we want to prove it. Talk about confidence!
3. No Time Limit Free Core Returns
Life happens! We know sometimes it takes a while to get your core back to us. As of August 1st, 2026, we now offer no-time-limit core refunds. You can return your core after ANY amount of time! We even cover the return shipping; truly hassle-free every step of the way.
4. Do You Need Fast & Easy Financing?
Next Gen Drivetrain® proudly offers fast, easy and affordable instant financing. You can finance your order straight from your computer or phone in as little as 5 minutes through companies like Affirm, Katapult & Shop Pay Installments. Some options offer as low as 0% APR! To learn how, check out our EZ Financing guide below:
> Next Gen Drivetrain™ Fast & Easy Financing Guide
5. Built Aisin Seiki AS69RC Transmission w/ Billet Torque Converter Build Specifications
The Next Gen Drivetrain Built Allison 10L1000 Transmission w/ Billet Torque Converter offers the most comprehensive build sheet on the market, compare us to anyone! Below you'll find an itemization of all inclusions associated with this custom upgraded transmission assembly.
5.1 Xtreme Tow® Build Specifications
Xtreme Tow® Series transmissions are a unique series of transmissions developed by Next Gen Drivetrain®, specifically for our truck and SUV customers seeking the ultimate work-horse. These transmissions generally feature upgraded pumps, valve bodies, torque converters, drums and friction materials whilst also consisting of a complete and total remanufacturing in excess of all OEM specifications.
Xtreme Tow® Series transmissions shift crisp but modestly, operate at comfortably low temperatures and are designed to optimize for longevity, low cost of lifetime maintenance and direct OEM compatibility while also capacitating the added power of potential modifications that are common in the working-vehicle community.
You can find Xtreme Tow® Series transmissions in everything from tow-trucks, to over-achieving daily drivers to modestly upgraded family trucks. Its low cost of maintenance and tremendous durability make them an attractive option for the majority of people looking for a mid level transmission with top shelf reliability.
If that isn’t attractive enough, these transmissions feature a 2 year, unlimited mile warranty. If you’re looking for a maxed-out reliability build, short of unnecessary racing parts that are not relevant to your application, the Xtreme Tow® Series transmission is the pristine option for you.
- Xtreme Tow® Torque Converter Assembly
- Billet Torque Converter Cover
- Billet Torque Converter Stator
- Billet Impeller Hub
- Billet Lockup Apply Piston
- New Roller Bearings
- New Updated Bushing
- Billet Eight-Disk Lockup Clutch
- New Updated Sprag Assembly
- 5 Billet Steel Dampener Pistons
- 1 Billet Steel K1 Accumulator Piston
- 10 Small High-Temp Accumulator Piston O-Ring Updates
- 2 Large High-Temp Accumulator Piston O-Ring Updates
- 5 Recalibrated Dampener Springs
- 1 Recalibrated Accumulator Piston Spring
- 1 Billet B1 Control Valve Sleeve
- 1 Billet B2 Control Valve Sleeve
- 1 Billet Secondary Pressure Regulator Valve Sleeve
- 1 Anodized B1 Control Valve Plunger
- 1 Anodized B2 Control Valve Plunger
- 1 Anodized Secondary Pressure Regulator Valve
- 1 Project Carbon® Laser-Cut Valve Body Separator Plate
- OEM Wiring Harness
- OEM Temperature Sensor
- OEM Solenoid Set
- OEM Valve Body to Pump Seal
- Precision Flattening of all Mating Surfaces (If Applicable)
- Billet Steel Overdrive Hub Assembly
- Carbon Graphite Upgraded "K1" Clutch Assembly
- Carbon Graphite Upgraded "K2" Clutch Assembly
- Carbon Graphite Upgraded "K3" Clutch Assembly
- Carbon Graphite Upgraded "B1" Clutch Assembly
- Carbon Graphite Upgraded "B2" Clutch Assembly
- Upgraded Laser-Cut "K1" Steel Set
- Upgraded Laser-Cut "K2" Steel Set
- Upgraded Laser-Cut "K3" Steel Set
- Upgraded Laser-Cut "B1" Steel Set
- Upgraded Laser-Cut "B2" Steel Set
- OEM Overhaul & Gasket Set
- OEM Filter Kit
- Cast Aluminum Deep Pan w/ Upgraded Hardware
- OEM Input Speed Sensor
- OEM Output Speed Sensor
- OEM Range Sensor Assembly
6. 2 Year/Unlimited Mileage No-Fault Warranty System
As of August 1st, 2026, Next Gen Drivetrain now uses a no-fault warranty system. We believe that confidence in the product does not end when the transmission leaves the shop. Every transmission is backed by a 2-year, unlimited mileage warranty, giving customers the freedom to drive, work, tow, and enjoy their vehicles without constantly worrying about mileage limits or complicated coverage restrictions.
Even more importantly, Next Gen Drivetrain stands behind one of the most critical components in the transmission—the valve body—with a lifetime warranty on the valve body component itself. Because the valve body plays such an important role in hydraulic control and shift quality, this additional protection reflects Next Gen Drivetrain’s commitment to engineering components designed for long-term performance.
What truly separates Next Gen Drivetrain, however, is its no-fault warranty system. Traditional transmission warranties can sometimes turn into an argument over who or what caused the problem. Customers may be forced to prove that a failure was caused by a defective component, while warranty providers search for reasons to deny coverage. Next Gen Drivetrain takes a different approach.
The no-fault warranty philosophy is designed to make the process straightforward. Instead of immediately focusing on blame, the priority is helping the customer resolve the problem and get their vehicle back on the road. That approach provides something every transmission customer wants: peace of mind.
When you purchase a Next Gen Drivetrain transmission, you are not simply purchasing upgraded components and performance-focused engineering. You are also receiving the support of a company willing to stand behind what it builds. With a 2-year unlimited mileage warranty, lifetime valve body coverage, and a customer-focused no-fault warranty system, Next Gen Drivetrain gives customers confidence long after installation.
7. Popular Transmission Information Resources
- Top 5 Benefits of an Upgraded or Built Transmission
- Calculating Torque Multiplication Factor, Why is it So Important?
- Top 5 Ways to Extend the Life of a Factory Transmission
