The Tesla Roadster launch has been anything but silky-smooth, but the upstart EV automaker hopes its problems are in the rear view mirror with the completion of Drivetrain 1.5, which includes an upgraded electric motor and swapping the original two-speed automatic transmission for a Borg Warner-sourced one speed. The changes will improve the Tesla Roadster's instant torque from 211 to 280 lb-ft while also improving its range by 10% to a shockingly impressive 244 miles. Drivetrain 1.5 also means Tesla can finally ramp up production of its well-publicized roadster. Within the next few weeks, Tesla will begin producing 10 Roadsters per week. By next March, that number will increase to 40 samples per week, which will go a long way toward satisfying demand for the sexy EV. The new, upgraded Drivetrain 1.5 is so much better than the mechanicals it replaces, Tesla will keeps its promise and retrofit the 38 models already produced and delivered with the new equipment.
The team at Tesla Motors has been hard at work attempting to prove that they can deliver a performance-minded electric vehicle to the world, but along the way they've hit a few bumps in the road. On top of recent organizational changes, one of the major hold ups on delivering the Roadster has been transmission issues. Their initial thought is to build the first production run with temporary single-speed boxes that will not live up to the proposed performance numbers, then modify the delivered cars once a solution arrives. Now it looks like the road ahead is getting smoother. It turns out that early adopters might not have too long to wait before they get their hands on the real Roadster. Tesla is reporting that through research and development of the WhiteStar sedan they happened to run across a solution for the drop top. They are dubbing it DriveTrain 1.5 and it should be submitted to testing next week.
DriveTrain 1.5 doesn't appear to be an easy fix, as it involves replacing the Roadster's entire powertrain. The electric motor is to be changed from an air-cooled motor to a more powerful liquid cooled unit and the power electronics will also be altered to supply the necessary increased current flow to the new motor. This adjustment will allow for the use of a single-speed transmission with a reduced gear design. The transmission is being developed and produced with the assistance of engineering firm Ricardo, which produces, among other things, the Bugatti Veyron's dual clutch gearbox.
