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 > Ideal V8 rpms when towing?

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theoldwizard1

SE MI

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Joined: 09/07/2010

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Posted: 10/09/19 09:53am Link  |  Quote  |  Print  |  Notify Moderator

Siletzspey wrote:


When cruising at 70mph, I turn 1,800rpms in 6th gear, and 2,300rpms in 5th gear. On a mild up slope the engine seems fine in 6th at 1,800rpms (e.g. I don't get any odd sound or sensation of lugging).

Is there any thought on what a good rpm is for the engine and transmission when towing a load? With my prior 1997 Ford Expedition, the TOW button would disable the highest gear (OD).

My old E150 was the same way. I would frequently disable OD when approaching a hill so that it would not lug down too low before it kicked down itself.

The newer Ford 6 and 10 speed transmissions are computer controlled and the engine should not lug down too low. I am sure there is a way to manually shift it. If you manually put it in 5th, it is going to stay there forever, even when you slow to a stop, unless you shift it or put it back in full automatic.

Siletzspey

Shedd, OR

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Posted: 10/09/19 10:27pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the replies!

I realized after asking that there is a miles-per-gallon optimization aspect, and a wear-and-tear optimization aspect, and I was thinking more of the latter.

I guess I've gravitated towards the answers that suggest the transmission and computer will choose a reasonable gear for all concerns. I do use the UP and DOWN arrows to set what top gear is allowed when 5-6 jumping occurs, and when going downhill.

Thanks,

--SiletzSpey

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