The life expectancy of a 68RFE transmission is highly dependent on the driving habits and maintenance performed. Generally, it’s expected to last for at least 200,000 miles or more with proper care and regular maintenance. Some drivers have reported going as far as 400,000 miles without having any major issues. In order to ensure maximum performance from your 68RFE transmission, it’s important to keep up with regular oil changes and filter replacements as well as avoiding prolonged idling or excessive heavy loads when possible. Additionally, aftermarket parts may be able to extend the life expectancy of this transmission further if installed correctly by a qualified mechanic. Overall, the 68RFE offers reliable performance that can stand up to daily use for many years if properly cared for and serviced regularly.