A One Diesel Engine & Transmission Repair Specialist offers professional Diesel Engine Repairs, located in Fontana, CA. For more information, call us now! We serve in Fontana, CA, Muscoy CA; Mead Valley CA; Woodcrest CA; El Sobrante CA; Grand Terrace CA; and the surrounding areas. Diesel Engine Repair, Engine Repair, Transmission Specialist, Hydraulic Repair Service, Diesel Engine Repair Service Truck Repair, Brakes Repair, Engine Rebuild, Professional Diesel Mechanic, Local Diesel Mechanic