Quote:
Originally Posted by Pete'sMH
There are two solid advantages for tow mode: one, it holds each gear longer on acceleration and if you are in the mountains or "heavy" as most RVs are this can be quite convenient at times to minimize the number of times the transmission has to shift and; two it puts the transmission in a mode to downshift each time you tap the brake. It does not, in itself, cause a downshift or overdrive lockout, it just makes it super easy to select a lower gear for engine braking when in mountainous country. Just try it a few times and see if you like the results. I'm quite sure lots of folks never use the feature and may even not know it's there- and they get along fine without it!
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Actually, on my 2015 F53 chassis when I get off the Interstate and start braking down the ramp the transmission downshifts early to assist the braking with no action on my part.
Also, while on cruise control, if I go down a long hill and the coach goes 5 mph over the set speed it will downshift to slow it down.
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