It is difficult to determine the current gear in 1966 Chevrolet K-10 trucks retro-fitted with NP205 transfer cases. A potential solution would have to accomplish three functions while meeting twenty driver and engineering requirements. A morphological chart was used to generate two types of solutions: electrical and mechanical. Five different solutions arose from these two types. These solutions were developed to a point which they could be compared with one another in a decision matrix. The decision matrix ranked a mechanical cable device with a needle gauge display as having the highest score. This design was built.

Attaching the cable to the transfer case and clamping its sheath was accomplished using pieces of aluminum flat stock and existing holes. The gauge was designed using AutoCAD and fabricated with primarily existing hardware.

The only problem with the design was encountered during testing. The needle did not always point to the same location when a gear-shift was repeated. This was a product of slack in the cable and was solved using a spring.

Overall the design was a success. It cost only $16.35 to build and looks like a feature that may of come on the truck from the factory. The design met all but one requirement.