The 2007 Ford Mustang 4.0-liter V6 coupe has a 5R55S transmission, which does not have a transmission fluid dipstick to check the transmission fluid or a dipstick tube to add fluid to the transmission. On a 2007 Ford Mustang, you need to take the car to the dealership on the scheduled maintenance date and have a certified Ford specialist perform the transmission maintenance for you. This is not a simple job to complete and you will void the warranty on the Mustang if you try to do it yourself.
Listen for the transmission of the 2007 Ford Mustang to change gears slowly or skip and slip while you are driving the Mustang. Take a note on what gear the transmission slips; the dealership mechanic will want to know.
Locate the closest Ford dealership to your location by logging onto www.ford.com. On this website, schedule the transmission maintenance date that will best fit your schedule.
Drive or tow your 2007 Ford Mustang to the dealership and allow a certified Ford mechanic to complete this process for you.
