Torque Trends

1.90:1 Torque Box Transmission for HPEVS & HyPer-9

$4,588.00 USD
Shipping calculated at checkout.



Introducing the 1.90:1 Torque Box Transmission, specifically designed to complement the performance of HPEVS and HyPer-9 electric motor systems. Engineered to deliver maximum torque and power to the wheels, this transmission is the perfect upgrade for any electric vehicle enthusiast looking to take their performance to the next level. It is also the go to solution when using the original transmission in an EV conversion project is not an option.

Crafted from high-quality materials and built with precision, the 1.90:1 Torque Box Transmission features advanced gear technology that provides lightning-fast shifts and unbeatable acceleration. With a gear ratio of 1.90:1, this transmission optimizes the torque output of HPEVS and HyPer-9 motor systems, ensuring maximum power transfer to the wheels.

Designed to withstand the most demanding driving conditions, the 1.90:1 Torque Box Transmission is built to last and provide years of reliable service. Its robust construction ensures durability and longevity, making it the perfect choice for any serious electric vehicle driver.

Whether you're racing on the track or pushing your electric vehicle to the limits on the open road, the 1.90:1 Torque Box Transmission gives you the performance edge you need to stay ahead of the competition. So why wait? Upgrade your HPEVS or HyPer-9 electric motor system with the 1.90:1 Torque Box Transmission and experience the ultimate in electric vehicle performance.


  • Gear Ratio: 1.90:1
  • Input Shaft: 1.125" (28.58mm)
  • Output Shaft: 1.5" (38.1mm)
  • Overall Length: 16.25" (413mm)
  • Weight: 85 lbs (38.5 kg)
  • Transmission Case Material: Cast Aluminum
  • Gear Material: High-Strength Alloy Steel
  • Synchronizer Type: Carbon Fiber Lined
  • Shift Mechanism: Billet Aluminum
  • Input Bearing: Tapered Roller
  • Output Bearing: Ball
  • Lubrication: Pressure Fed Oil System

The 1.90:1 gear ratio is optimized for HPEVS and HyPer-9 electric motor systems, providing maximum torque transfer to the wheels for improved acceleration and performance. The input shaft has a diameter of 1.125 inches (28.58mm) and the output shaft has a diameter of 1.5 inches (38.1mm). The overall length of the transmission is 16.25 inches (413mm) and it weighs 85 pounds (38.5 kg).

The transmission case is made of cast aluminum for durability and lightweight performance. The gears are constructed of high-strength alloy steel to withstand the stresses of high-performance driving. Carbon fiber lined synchronizers provide smooth and precise shifting, while the billet aluminum shift mechanism ensures reliable operation.

The 1.90:1 Torque Box Transmission also features a pressure fed oil system for efficient lubrication of all components, and it is equipped with tapered roller and ball bearings for smooth operation and durability. With its high-quality construction and optimized gear ratio, this transmission is the perfect choice for any electric vehicle enthusiast looking to maximize the performance of their HPEVS or HyPer-9 motor system.