the video is to show you how it works and what causes what failure - the guy tells it pretty nicely of what valve failure causes what shift problem.

This way you are armed with a bit information on when the mechanic pulls out job orders and tries to rectify it.

I did not post it asking you to tear into it.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)