Quote:
Originally Posted by pjmoreland
I believe the reason they recommend towing in 3rd is because it is a 1:1 in that gear, so none of the planetary gearsets are spinning. The internals produce less heat that way.
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It works that way in a manual transmission.
https://www.youtube.com/watch?v=M90fPWg-7DQ
See the 30 min mark, of the video, for the power flow on the 4l60, 4L65 and 4l70.