4L60E Power Flow - Manual 1st, Manual 2nd, & Manual 3rd

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How an automatic transmission works can be mysterious. However, it doesn't have to be. In the last video, we learned how the power flows through the 4L60E automatic transmission. We learned about the clutches, the band, the one‑way clutches, the planetary gear sets, etc. In this video we learn about 4L60E diagnosis. Once we have an understanding of how this automatic transmission works, and we combine that knowledge with reference material (clutch & band application chart), we can then start to understand the basics of automatic transmission diagnosis.