Control Trac
ControlTrac four-wheel drive is the brand name of a selectable automatic four-wheel drive system offered by Ford Motor Company. The four-wheel drive system was designed and developed at BorgWarner under its TorqTransfer Systems division in the mid 1980s. BorgWarner calls the system Torque-On-Demand (TOD). ControlTrac was the first automatic system to use software control and no planetary or bevel geared center differential. Instead of a planetary or bevel geared center differential, the system uses a variable intelligent locking center multi-disc differential.
Read more about Control Trac: Availability, Design & Development, Off Road Testing, The Modes, AdvanceTrac, Control Trac II
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