Coming back from a series of out of town jobs the transmission started slipping. Limped it the last 100 miles home going 40mph. By the time I was pulling into town it would no longer stay in 3rd, I made the last couple miles home going 25mph. Trucks in the shop now. Mechanic is going to see if anything can be dome to keep from having to replace but it's not promising. Now I got to figure out how I'm going to do any work the next week or so.