Introducing the Wunderdrive

The W - Underdrive is basically the same unit unit championed by the Baldwin Race team for the past 4 years in their 4WD trucks without the front wheel drive. The Wunderdrive couples to existing automatic transmissions with an adaptor plate that bolts directly to the back of the transmission case. The input shaft is machined to mate to Ford or Chevy transmission output shafts.
 

The most important feature of the Wunderdrive is our extremely rugged Weismann Quick Change Gears which gives the racer the unique ability to run the strongest Ring Gear and Pinion ratios available, while allowing the racer to achieve the desired Overall Ratio.

The Wunderdrive is designed around two sets of Weismann Quick Change ratios giving the racer 52 ratios to choose from with just 15 gear sets!

Extremely fine ratios splits allows the racer to fine tune their unique race truck to suit changing tracks, different track conditions, different final drives, tires, and engines.

Another important Wunderdrive feature is the built-in Weismann mechanical pump and drysump system. From the sump tank, oil is pumped from the gearbox to an external cooler and back. Race proven to finish the Baja 250 without a cooler, our unique system allows the Wunderdrive to run cool and thus save wear and tear of vital internal components. 
 

The Wunderdrive is made out of billet 6061, CNC machined to be light weight yet extremely strong. A forged 1350 series output yoke with a hefty 35 tooth spline delivers the power and torque to the rear driveshaft.
 

Download the Weismann Underdrive Ratio Chart to see a complete list of ratios coupled to common Ring Gear and Pinion ratios.

WUNDERDRIVE
 

The Wunderdrive has been raced very succesfully for the past two years in Carl Renezeder's SCORE Trophy Truck and CORR Pro-2 truck, winning the Pro-2 championship in it's first season. Recently Todd LeDuc and Ricky Johnson fitted their Pro-2 trucks with Wunderdrives.
 

Todd LeDuc

Ricky Johnson