The labor in hours required to replace a transmission varies between model of car and the type of replacement, but estimates vary from five hours to 16 hours to remove and install an automatic transmission. Transmission replacement is one of the most complex automotive repair tasks.
The complexity of the replacement depends on the type of transmission in the vehicle, the vehicle's design and whether the owner has ordered an outright replacement or a rebuild of the existing transmission. Manufacturers quote a specific amount of time for factory-trained technicians to remove and replace a transmission, but this can vary widely between vehicle models.
