Cerma Transmission Manual 2oz Bottle Cerma treatment is the only product of it's kind! Cerma for Drivetrains will restore fast smooth shifting Cerma products are environmentally safe and do not contain any solvents or PTFE's ceramic technology to form a micro-ceramic protective coating on all metal parts within your car or trucks transmission or differential. Cerma restores life to your old Manual Transmission and Extends life to your new Manual transmission!