Project Carbon™ Aisin Seiki AS66RC Valve Body w/ New OEM Electronics

Next Gen Drivetrain, Inc.

The Project Carbon™ Valve Body

               Welcome to the Project Carbon™ AS66RC Valve Body by Next Gen Drivetrain™. This valve body is designed to be the perfect dichotomy between practicality and performance; maximizing both without sacrificing the other. We’ve done an incredible amount of research on the 68RFE valve body over the years, and have compiled much of that information into our Drivetrain 101 Technical Publications that can be found here:

>>> Aisin Seiki AS66RC Transmission • Problems & Solutions

A Valve Body for Everyone

              At Next Gen Drivetrain™, we are well aware that not all customers are seeking the same desired end state. Some customers seek the ability to tow triumphantly over large grades and maintain cool temperatures; maximizing longevity. On the other hand, we have customers seeking the ability to displace as much power as possible, and naturally, everything in between. We pride ourselves on dominating the AS66RC valve body with superior technology that allows us to deliver a true totalitarian solution that is designed to bolt into any unmodified AS66RC and produce incredible results without the need for complicated modifications to tuning or shift dynamics.

               In fact, this valve body is 100% bolt in, tuned or untuned in almost all cases. Naturally, not all tuners tune the same and it would always be smart practice to communicate with one of our experts first to ensure smooth sailing at all points in the transition to your vehicles new and greatly enhanced valve body.

              Something that most should understand is that the valve body is not the part of the transmission that produces pressure, but rather the pump. The reason the valve body is critical in producing pressure is because it is easily the largest leak-point in this transmission. Our flagship valve body, the Project Carbon™, absolves these concerns in totality, justifying our unique Lifetime Warranty on this product. Our AS66RC Project Carbon™ valve body is 100% pre-configured to install as manufactured without TCM tuning.


This is a must-have for the following applications:

- Daily Driving

- Towing/Hotshotting

- Drag Race/Sled Pull

- Commuting

- General Enhancement

- Commercial Applications

This AS66RC Valve Body will provide you with:

- Crisper/Faster Shifting

- Smoother Clutch Handoffs

- Faster Acceleration

- Enhancement to Transmission Clutch Life and Holding Power

- Enhanced Safe Towing Capability

- Resolution of ALL Internal Valve Body Crossleaks

Project Carbon™ AS66RC Valve Body Features:

- Billet Steel Project Carbon™ Accumulator Pistons w/ Custom Relief Circuits

- Rubber O-Ring Piston Update to Prevent Crossleaks at Head of Accumulators

- Recalibrated Accumulator Springs for Slightly Crisper/Firmer Shifts

- Laser Cut Steel Separator Plate w/ Paper Bonding

- Steam Tanking and Pressure Cleaning

- Lathing/Stoning of contact surfaces to 0.001”

- Highly Modified Oil Circuitry to Enhance Shift Quality

- No Measurable Line Pressure Limitations*

- NeverLeak Valve Technology

- New OEM Solenoid Set

- New OEM Pressure Switch Set

- B1 Billet Valve Sleeve

- B2 Billet Valve Sleeve

- Anodized B1 Plunger

- Anodized B2 Plunger

- Billet Pressure Regulator Valve Sleeve

- Anodized Billet Secondary Preassure Regulator Valve

- Anodized Billet Primary Pressure Regulator Valve

- Recalibrated Pressure Regulator Valve Springs

- Next Gen Drivetrain™ Proprietary Cooler Flow Upgrade & Spring

* - The AS68RC and AS66RC reject any and all forms of TCM tuning and should not be adjusted to operate at higher pressures. The purpose of this valve body is to resolve any existing crossleaks and ensure a vacuum tight distribution of oil inside the unit. Do NOT attempt to raise line pressure on the AS68RC or AS66RC!


    The Project Carbon™ AS66RC Valve Body is designed to encompass the best of what we have to offer; equally sufficing both the daily driving crowd, and the high performance crowd. Whether your priorities are longevity, performance, towing or otherwise, the Project Carbon™ valve body is the premier option! For more information, call in and speak to one of our experts.

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