About Our Business
In 1983, Robert McMahon opened McMahon's Auto Diesel Repair after graduating from
Nashville Auto Diesel College. Having grown up around the Automotive Industry at his fathers
service station as a child and the family trucking business, he decided to give it a try on his
Not really interested in owning a trucking company, Robert's brother, William T McMahon Jr.,
took over the family trucking business. Instead Robert chose to provide a towing service to go
along with the Repair Shop.
With the guidance of his father, William T McMahon Sr,they built the business to what it is today after more than 34 years of operation.
Our business takes quality and customer service seriously. As a NAPA Truck Service Center, we
follow a strict Code of Ethics so customers will know up front what to expect. As part of this
code, we pledge to: Perform high-quality diagnostic and repair services at a fair price, using
quality NAPA truck parts. Employ ASE-certified technicians in all areas of work performed in truck
and applicable automotive categories. Be dedicated to customer satisfaction. Exercise
reasonable care for the customer's property while it is in the shop's possession. Obtain prior
authorization and provide a price estimate for work performed. Provide a system for fair
settlement of customer complaints, should they occur. Maintain the highest standards of the
truck service profession. Uphold the integrity of all members of the NAPA Truck Service Center
We currently offer the NAPA "Over the Road" Warranty that covers parts and labor for 45-days
and unlimited mileage for highway-use, commercial vehicles on qualifying repairs and is
honored at over 500 NAPA Truck Service Centers across the country.