Behemoth Drivetrain,L.L.C.

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Behemoth Drivetrain,L.L.C. www.behemothdrivetrain.com We manufacture high-performance, custom drivetrain components; specializing in underdrive units, adapters, and clocking systems.

10/06/2026

Introducing the Behemoth Helix-HP — our new High Performance EV gearbox.

Commissioned by .losangeles, the Helix-HP was developed for one very specific mission: serious power at serious speed.

Later this year, it will be put to the test as part of an attempt to break the EV land speed record.

And in just a few weeks, we’ll have the full Helix EV transmission product line on display at SEMA.

If you’re building an EV and need a transmission or gearbox solution, we want to talk to you.

Less than 2 days until our runners toe the line for the 2026 Hot Rod Ultra!And these sponsors are part of the reason our...
09/24/2026

Less than 2 days until our runners toe the line for the 2026 Hot Rod Ultra!

And these sponsors are part of the reason our runners are able to do so 🙌

Thank you to every single person who has donated and supported our race!

Reminder: join us for a shakeout run tomorrow at 9:30 am

09/16/2026

Introducing the Behemoth Helix Modular EDU.

Instead of forcing every customer into one motor, one gearbox, and one fixed configuration, we built the Helix platform around choice.

Customers can now:

Purchase any of our Helix gearboxes individually and integrate the motor of their choice.

OR

Specify the motor they want to use and let Behemoth deliver the complete EDU assembly — motor, Helix gearbox, controller, and integration — assembled and ready to install.

We’re already compatible with many of the major electric motor manufacturers on the market, and because the Helix platform was designed to be adaptable, we can engineer the system around almost any motor required for the application.

Axial flux. Radial flux. Different power levels. Different gear ratios. Different vehicle architectures.

The idea is simple:

You choose the motor. You choose the Helix. We build the EDU around your application.

This gives OEMs, vehicle builders, conversion companies, and specialty vehicle manufacturers a much easier path to a complete electric drivetrain without abandoning the motors or suppliers they already know and trust.

This is the direction we believe electric drivetrains are headed — modular, configurable, and application-specific.

09/04/2026

Proud day for the Behemoth team.

This is the first Helix-TS — our new two-speed, selectable gearbox — and this unit is officially heading out for real-world field testing.

The Helix-TS gives the operator two selectable ratios:
1:1 direct drive�1.36:1 reduction

A lot of engineering, machining, problem solving, testing and teamwork went into taking this from an idea to a finished gearbox sitting on the table.

Huge congratulations to the Behemoth team for bringing this to the market. The Helix-TS will be on display at SEMA this year, along with the rest of the Helix product line.

The Behemoth Helix EV gearbox lineup gives EV builders, OEMs, and specialty vehicle manufacturers purpose-built drivetra...
08/25/2026

The Behemoth Helix EV gearbox lineup gives EV builders, OEMs, and specialty vehicle manufacturers purpose-built drivetrain solutions designed around modern electric power.

🔹 HELIX IL — Inline EV Gearbox
2.72:1 reduction • Validated to 11,000 RPM • Integrated parking actuator & sensor

🔹 HELIX IS — Independent Suspension Gearboxes
E30 & E40 platforms • Multiple ratio options • Open, TruTrac L*D, E-Locker & Air Locker configurations • Custom motor mounting and input spline options

From compact EV conversions to high-performance and commercial applications, we can work with your team to develop a gearbox package around your motor, packaging, torque, RPM, and duty-cycle requirements.

🇺🇸 Designed, machined, and assembled in Kentucky.

Need more capacity? Ask us about our Helix E60 and E80 platforms.

📩 [email protected]
📞 (855) 928-1984

The warehouse team came in this morning and discovered we had a visitor over the weekend..... 😬 😬
08/03/2026

The warehouse team came in this morning and discovered we had a visitor over the weekend..... 😬 😬

07/20/2026

Finally... An Inline Gearbox Designed for EV Conversion Builders.

The Helix IL lets you retain a traditional inline driveline while integrating today's high-speed electric motors.

Built from the ground up for EV applications—not adapted from legacy driveline technology.

✔ High-RPM planetary architecture
✔ Continuous-duty cooling system
✔ Compact inline packaging
✔ Integrated parking brake
✔ Built for demanding EV conversions

Because your gearbox shouldn't be the weakest part of your build.

07/10/2026

ACP arrives today! Behemoth will be designing a custom gearbox based off our our Horizon platform over the next few weeks.

This armored personnel carrier is officially loaded up and on its way to the Behemoth facility for R&D work.Originally p...
07/09/2026

This armored personnel carrier is officially loaded up and on its way to the Behemoth facility for R&D work.

Originally powered by two Russian diesel engines, this APC is being converted to run on a single CAT diesel engine. Behemoth will be handling the diesel engine install and designing a custom gearbox around our Horizon military transfer case platform, using a single input / dual output configuration.

Having the APC on site will allow our team to design, test, and dial in the gearbox exactly around the vehicle.

And yes… if everything goes to plan, you can expect to see Behemoth employees doing donuts in the parking lot with this thing by the end of summer.

Stay tuned. This is going to be a wild one.

Serving up some fresh Cast Apex NP205s!Apex NP205 powder coated cast bodies are coming out of machining now, and will be...
06/17/2026

Serving up some fresh Cast Apex NP205s!

Apex NP205 powder coated cast bodies are coming out of machining now, and will be paired with billet lids and headed into assembly next week. We’ve got several pallets of Apex NP205 transfer cases in process and coming together - ready to change the game again....

Cast strength. Billet where it counts. Built for real abuse.

Address

Leitchfield, KY
42754

Opening Hours

Monday 7:30am - 8pm
Tuesday 7:30am - 8pm
Wednesday 7:30am - 6pm
Thursday 7:30am - 8pm
Friday 7:30am - 8pm
Saturday 7:30am - 6pm

Telephone

+18559281984

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