Behemoth Drivetrain,L.L.C.

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

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.

05/27/2026

Meet the new Samson™ 4:1 Rubicon Strongbox.

4:1 reduction.
Massive Rubicon gear set.
Huge 9.5” ring gear.
Four giant pinions carrying the load.

The result?
A ridiculously strong underdrive that runs smooth, quiet, and is built to take an absurd amount of abuse.

This isn’t some tiny planetary setup hiding in a fancy case. The Samson is BIG. Heavy-duty components everywhere you look.

Compatible with many Dodge and Jeep transmissions, with additional spline options available for JK and aftermarket applications.

This video shows the front section assembly of one of the very first Samson units going out to customers this week.

Our Insider list got first shot at the initial batch, but full production inventory is coming this summer.

Want one? DM us.

05/26/2026

Introducing the Helix IL™ from Behemoth Drivetrain

A production-focused inline EV gearbox built for ultra high-RPM electric motor applications and ICE-to-EV conversions.

The Helix IL uses a custom high-speed planetary design to deliver compact packaging, high-load durability, and smooth operation at speeds up to 13,000 RPM.

Compatible with Cascadia, Turntide, Hyper9, and YASA motor platforms.

• 2.72:1 planetary reduction
• Integrated oil pump + cooler
• Hybrid ceramic bearings
• Electronic parking paw
• Inline architecture for traditional driveline layouts

05/19/2026

The Helix EV platform was built to solve a problem:

Most EV drivetrains were never designed for high RPM electric motors, real off-road abuse, or production-level integration.

The Helix lineup from Behemoth Drivetrain includes both Inline and IFS gearbox configurations depending on the application.

⚡ Helix IL (Inline)
Designed for ultra high-speed EV motors and applications where you need a compact inline reduction gearbox without an integrated differential.

Perfect for:
• Solid axle vehicles
• Transfer case based drivetrains
• Custom EV conversions
• High RPM motor applications

Features:
• 2.72:1 planetary reduction
• Integrated parking paw
• Hybrid ceramic bearings
• Optional oil pump & external cooler system
• Precision internal oiling channels
• Supports axial flux and radial flux motors

The Helix IL is also a direct competitor and alternative to the Torque Trends Torque Box — designed for customers looking for a more production-focused, high RPM capable solution.

⚡ Helix IFS
Designed for independent front suspension EV platforms that require an integrated differential gearbox.

Perfect for:
• OEM EV platforms
• AWD/4WD applications
• Custom IFS chassis
• Production vehicle programs

We’ll also be showing more of the upcoming Helix Drop model soon.

A lot of EV drivetrains are still adapted from existing parts and legacy platforms. Helix was designed from the ground up specifically for modern EV applications.

05/15/2026

Behemoth owner Jim Winn got invited to speak at a local preschool Career Day this week 😄

Turns out, if you show up and talk to a bunch of 4-year-olds about race cars, monster trucks, and big tires… you’re basically an instant celebrity.

The kids absolutely loved it — and honestly, Jim may have had just as much fun as they did 😂🤘

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

Website

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