Borg Warner 31-03 eGearDrive.
This single speed transfer case was developed by Borg Warner specifically for electric drive applications. It has emerged as THE drive train for electric vehicle applications.
It was used by CODA with the UQM drive train and by Azure Dynamics with their eTransit Connect. The Aptera and the Tesla Roadster also used this gearbox.
The 8.28: 1 drive ratio is perfect for single ratio electric vehicle applciations.
Ideally suited for full performance electric vehicles on either front-wheel drive or rear-wheel drive transverse driveline applications, the BorgWarner 31-03 eGearDrive(TM) single-speed transmission delivers high torque capacity, high efficiency, and low noise, vibration and harshness (NVH) in a compact package. Named a finalist for the 2010 Automotive News PACE Awards, BorgWarner's eGearDrive™ transmission incorporates patented and proprietary technology as well as over 100 years of powertrain know-how. Through its high-efficiency gear train and compact, low-weight design, the BorgWarner eGearDrive™ transmission contributes to extended battery-powered driving range which in turn reduces the required amount of battery capacity needed. The transmission also achieves high torque capacity in a compact package with greater than 97% efficiency, while providing smooth, quiet operation. Approximately 99% of the materials used in the eGearDrive™ transmission are recyclable.
"BorgWarner's 31-03 eGearDrive is a purpose built, high performance transmission that can be broadly adapted to a variety of electric propulsion systems," said John Sanderson, President and General Manager, BorgWarner Drivetrain Systems. "Designed for fast-to-market implementation, we expect this eGearDrive transmission to accelerate growth in the all-electric and hybrid electric vehicle segments." In addition to providing primary drive for front-wheel drive and rear-wheel drive electric vehicles and hybrid electric vehicles, BorgWarner eGearDrive systems enable launch assist, energy recovery, and AWD performance for the secondary-driven axle on any type of vehicle. Also available is an optional electronically actuated park lock system as well as various electronic driveline disconnect systems.
We acquired 16 of these from the AZD auction and they are perfectly mated to the Seimens 5135 motors and includes a shaft adapter for this motor. SOLD OUT!
We have been able to resupply direct from Borg Warner, but unfortunately not at the liquidation price.
High Efficiency Helical Geartrain
Rated continuous torque: 200 nm (145 ft-lbs)
Rated peak torque: 300 nm
Input speed: up to 14,000 rpm
Borg Warner eDrive Data Sheet
Borg Warner eDrive to Siemens Coupler drawing
eGear Drive CAN bus Protocol Document
Borg Warner eDrive Shaft Options