It's a running issue with me. This one made it to 197,360 miles on the original transmission but I got it at 165,000 miles. My last 4l60e failure was a Tahoe I had no history on but the transmission in it when I got it was painted black so I know it was a rebuild or reman and it only lasted me 20,000 miles.change your rear gears. 4.11s minimum. your 4l60e keeps going because your builder doesn't know what they are doing. i highly doubt it's from your driving style, but the 4l60e would gain life with a lower gear raitos as well. when you thrash on it or tow pull the lever to 3rd. doing so will also increase the life greatly.