I have an early 1993 Chevy pick up that has probably one of the first 4l60e’s ever built. It’s getting close to 300,000 miles on it and is still functioning like new. It has received regular fluid and filter changes since new. I also have a 2007 GMC Canyon with a 4l60e that has 210,000 miles on it. It is still working like new. It has been serviced per the owners manual for the most part.