proprietary tech

Pure Drivetrain Solutions mission is to provide the performance aftermarket with the best possible driveline components.

We aim to achieve this by pushing the boundaries of what's possible and offering high-performance transmission upgrades and rebuild kits, as well as other driveline components.

Our approach focuses on enhancing the holding power and reliability of your transmissions through modifications of oem items and manufacturing proprietary billet parts to add overall strengthen that can endure the abuse it is subjected to.

We pride ourselves on being unapologetically, the best.

Four metallic car automatic transmissions displayed against a white background.

Proudly manufacturing all products in the USA. We are a multi facility business with all parts, products and staff in the United States of America. Our incredible staff have the knowledge, experience and eagerness to tackle any project that may arise.

in house manufacturing:

the siag PROJECT

pronounced: SEEJ

Brochure cover for P Pure drivetrains solutions featuring three images of gearboxes, with the text 'SIAG / SEEJ / Super Intelligent Adaptive Gearbox' at the bottom.
Promotional material for Pure Drivetrain Solutions' SIAG transmission, including brochures, a sprint car image, and racing gear. The content highlights the SIAG's performance features, development, and capabilities for high-speed racing applications.

Pure Drivetrain Solutions introduces SIAG, Super Intelligent Adaptive Gearbox. The first of its kind; a gearbox that checks every single box, for multiple applications. Drag Racing, Road Course, Auto X, Drifting, Sand Drag, Resto Mod, Drag & Drive, Street Cars, Roll Racing - literally ANYTHING!

  • Available in RWD and AWD configurations.

  • Rated for 2000ft lbs / 2700Nm.

  • Lightning quick shift times.

  • 10,000+ RPM capable

  • CAN Integration

  • 16gb of datalogging memory

  • Full range of I/O's with power supply options of 5v and 12v both HS, LS and much more.

SIAG is the most advanced and versatile gearbox in the world. It's an eight speed automatic, it's a six speed H pattern, it's a six speed sequentially shifted gearbox or it's a paddle shifted sequential. YOU decide what YOU want the gearbox to be. The SIAG has seven internal clutches, an external clutch, and a torque converter. Yes, it's all that and much much more.

Here's a very brief summary touching on some of what SIAG is about and how it operates in both Manual and Automatic modes:

Manual Mode: 

When using the transmission with our H pattern or sequential shifter setup along with our clutch pedal assembly you will use the clutch for starts, you can launch off of a 2 step, be able to clutch kick the car for drifting, or just enjoy cruising around and kicking the clutch to grab the next gear. 

The shifter and clutch pedal assembly is fully configurable to suit the driver's desired wants and needs. Drivers can adjust the firmness of the throw, the “notchiness” of the shift, the length of the throw, even the stiffness of the clutch pedal is adjustable to how the operator wants it at the simple turn of a knob. The full driver experience is able to be dialed in exactly as YOU wish.

SIAG, in any of the manual configurations is completely controlled by the end user by choosing which six gear ratios you would like to utilize. At any given moment you can connect via a laptop, use our blue tooth based app or by utilizing our map select switch to change which gear ratios you desire to be running. An example of this would be, driving to the track and you want 6th gear to be an over drive gear utilizing our tallest ratio, .065, to keep the engine rpm down and have a nice cruise safely to the track. Once you arrive at the track, now you want 6th gear to be a 1.00 ratio, It is just a click away. If you want to drive to the track in full automatic mode utilizing all 8 gears you can do that too. YOU, the end user decides what YOU want the gearbox to do.

Automatic Mode: 

When in automatic mode the end user is always in full control. Whether you want to utilize all eight gears to cruise around, use six gears to road race or drag race or maybe just two for sand drags it's all up to you. There are eight forward gear ratios to choose from and it's up to you to decide if you want to use all eight or not; you can use as many or as little as you'd like. It's possible to go directly from any of the available gear ratios to your next option without having to go through the others, all gears are always engaged and it's the job of the GCM to enable the internal clutches to apply the selected gear. Pure proprietary software gives you full control of the shift points and shift firmness among other things. You want the gearbox to shift buttery smooth on your cruise to dinner but then have very quick and firm shifts at the race track. It's all possible with SIAG. 

SIAG offers multiple launch control strategies to be used. The option of launching the car off of a footbrake or a transbrake are both available. 

When it comes to the torque converter we have endless options to suit the needs of your build; you tell us what you are looking for and Pure can spec out exactly what you need. From 2000rpm to 6500rpm stall speeds Pure has you covered.

Adapter Plates and Flywheels:

The SIAG can be purchased as a full unit and then be adapted to any application you like or you can purchase the flywheel and adapter plates from PDS and make it a bolt in affair. PDS will be offering flywheels and adapter plates for all popular engines and are willing to make any adapter plate and flywheel to accommodate your project. RWD and AWD: The SIAG gearbox lives up to its name and that's adaptive. The gearbox is offered in both RWD and AWD configuration; the best part, it's the same gearbox. All that changes is the tail-shaft housing of the gearbox to adapt to the transfer case. If you have one transmission it can be used in a totally different application in the future if your project changes.

Gear Ratio Selection: 

The SIAG currently has an overall gear ratio spread of 7.75 - Gear ratios are as follows: 

  • 4.65 

  • 3.10 

  • 2.10 

  • 1.65 

  • 1.35 

  • 1.00

  • .85

  • .60

An informational poster about the GCM gearbox control module. The poster features a picture of the GCM hardware, a smartphone displaying app interface, a module with wiring, a laptop showing software, and a control pad with labeled buttons. The text explains the GCM’s features, specifications, and capabilities for automotive tuning and diagnostics.

learn more about THE SIAG

A racing steering wheel with paddle shifters and a clutch pedal assembly, displayed on a black textured background with descriptive text about their features.
Image of two different types of gear shifters used for selecting forward and reverse gear ratios, with explanatory text detailing their features and functions.

  • The gearbox control module otherwise know as the GCM is a very powerful unit that has a lot of options and a very user friendly software. The attention to detail and options is next to none. The GCM has a 16GB data-logger. The GCM can display and store fault codes in the case of an internal issue.

    While the GCM controls all the SIAG functionality, it also has a list of other options built in to make sure it is fully adaptive to your project: 10 analog inputs, 4 Digital inputs, 4 frequency inputs. 12 power outputs that can be configured as high side or low side outputs, +5 volt power supply, +12 volt power supply and 4 analog outputs. CAN communication: 2 x 125, 250, 500, 1MBps and protocol for most common aftermarket ecu's. Bluetooth integration to our APP and our tuning suite are supported

    on both Windows or Mac based platforms. The GCM's frame and electronics are automotive grade and are fluid resistant. PDS uses only the best autosport milspec connectors for the wire harness ends along with a usb-C connector for connection. 

    The GCM has the capabilities of storing 5 full GCM tune files, all which can be assigned to a "map select location". There are 5 location slots available that you can toggle through without connecting to the GCM via a laptop or the APP the push of a button on your preset GCM file location number and the GCM will change to

    the GCM file you have selected.



  • Paddle Shifters On The Steering Wheel: 

    The paddle shifter has the ability for a total of seven gears, one being reverse and six forward gear selections. This setup allows the user to choose from the available gear ratios they want to utilize. The paddle shifters have the ability to be versatile in how it can be set up, it's all up to you, you can choose the left or right paddle for up or down shifts. At any given time you can choose to change your ratios on the fly via the map select switch. The map select switch is tied directly into the GCM and you can have five completely different gearbox tune files to select from at the push of a button. If you choose to not utilize the map select switch you can use either the bluetooth based APP or connect directly via a laptop to make your changes. This setup has the option of coming with a gear indicator display so you are aware of which gear you are in at all times or you can transfer the data from our GCM via CAN to any major aftermarket display system.

    Clutch Pedal Assembly: 

    The clutch pedal assembly is a virtual clutch pedal, it is a clutch by wire assembly but has the feel of a standard manual clutch pedal. The firmness of the clutch pedal is fully adjustable to just how the operator wants it at the simple turn of a knob. The virtual clutch gives the user the ability to "neutral out" at any given time, whether it be to launch the car off a 2 step launch control setting or kick the clutch for drifting, it is all possible via the virtual clutch pedal.


  • H-Pattern Shifter: 

    The H pattern shifter has the availability for six forward gear selections and reverse gear. Pushing the shifter down and to the far left and forward engages reverse, the standard H pattern format is followed after that. The H pattern setup allows the user to choose from the available gear ratios they want to utilize. At any given time you can choose to change your ratios on the fly via the map select switch. The map select switch is tied directly into the GCM. You can have five completely different gearbox tune files to select from at the push of a button. If you choose to not utilize the map select switch you can use either the bluetooth based APP or connect directly via a laptop to make your changes.

    Sequential Shifter: 

    The sequential shifter has the ability for six forward gear selections and the reverse gear. This setup allows the user to choose from the available gear ratios they want to utilize. This sequential shifter assembly has the ability to be very versatile in how it can be set up, for example, if you want to push forward for up gears and pull back for down gears you can do it. If you want to reverse it and make it so you push forward for down gears and pull back for up gears you can do that too. At any given time you can choose to change your ratios on the fly via the map select switch. The map select switch is tied directly into the GCM and you can have five completely different gearbox tune files to select from at the push of a button. If you choose to not utilize the map select switch you can use either the bluetooth based APP or connect directly via a laptop to make your changes. This setup has the option of coming with a gear indicator display so you are aware of which gear you are in at all times or you can transfer the data from our GCM via CAN to any major aftermarket display system.


“What could be the most versatile transmission ever developed for high-performance and racing applications, the SIAG (Super Intelligent Adaptive Gearbox) is being released by Pure Drivetrain Solutions in Medford, New York.

This new transmission can be configured with up to eight speeds, works in RWD and AWD setups, and is rated for 2,000 lbs.-ft. torque and 10,000 rpm. It features seven internal clutches, an external clutch, and a torque converter. It can be a paddle-shifted sequential six-speed gearbox, a four-speed H-pattern with a clutch, or a fully automatic eight-speed.

The SIAG was developed by Chris Miller, who started with an idea to design a transmission that would shift faster than a DCT but keep the planetary concept. Then a couple of drag-and-drive racers asked about alternatives to an auxiliary overdrive.

“I asked them, what if there was a transmission that could support 2,000 lbs.-ft., and it could be an eight-, six- or even two-speed. You pick from eight different ratios. They thought I was in fantasy land,” recalled Miller.

The gearbox control module is fully programable, from the number of speeds to the “feel” of the clutch pedal. The GCM can store five full tuning files that can be toggled through using a remote button panel. An app will also be developed to make minor adjustments from a cell phone. “

—Mike Magda

PRI Editors Choice Award Article

A large mechanical component, possibly a turbocharger or a jet engine part, displayed on a table at an exhibition, with pink candies in the foreground and racing cars and banners in the background.

the siag

downloadable pdf file

“This project is very ambitious to be honest, something that most cant even wrap their head around- we look forward to bringing more insane ideas to market!”                                      -Chris Miller