DOT-Lok ™ is a transmission Shift Inhibitor designed for vehicles with electric shift transmissions like those found on most new model forklifts.  DOT-Lok reduces repair expenses associated with transmission abuse, torque converter failure, drive axle failure, flex plate damage, planetary shock load and tire wear.  Like SSC's TRANS-STOP product line, DOT-Lok requires operators stop or slow vehicles prior to shifting the transmission to change vehicle direction.

The brains behind the original DOT-Lok brake sensing and speed sensing kits is an Electronic Control Module.  While the systems based upon this design continue to help many, a new microprocessor based DOT-Lok MP system is now available.  The results of this new design are impressive.

DOT-Lok MPE prevents forklift operators from enabling a drive gear if the vehicle land speed and/or engine RPM level is too high. The transmission engages a gear, only when the throttle is low enough and the delay time has elapsed. The delay allows the engine to rev down before shifting occurs. DOT-Lok interfaces directly to the vehicle APPS sensor if the vehicle is equipped with electronic throttle (Drive by Wire). DOT-Lok MP can be fitted on vehicles with mechanical throttle linkages by adding a limit switch. The standard DOT-Lok system defaults the transmission into NEUTRAL when shifting outside set shift ranges. By enabling the optional Engine Braking feature, the transmission remains in the gear for which the truck is traveling and the engine automatically idles down utilizing engine assisted braking.  By enabling the optional Seat Switch Lockout, the transmission automatically shifts into Neutral when the operator leaves the vehicle with the engine running and transmission engaged (soon to be required on all new fork trucks in the USA). 

DOT-Lok TRACTION
DOT-Lok Speed Sensitive Shifting is available as a stand-alone product or can be purchased with Traction Control.  DOT-Lok Traction Control gives you all the features of the standard Speed Sensitive Shifting unit plus traction control.  Traction Control prevents the drive tires from free spinning when a forklift operates on slick surfaces such as ice, oil, water, dust and ash covered surfaces.  The system further limits tire spinning when the inching pedal is dumped at high engine RPMs.  Please Note: In the above video, soap and water was spread across the floor.