I will be driving through a mountain pass soon. do i turn the over drive off since its going through hills. or because I will be going 60 plus to i leave it on.


Asked by Apr 02, 2015 at 01:02 PM about the 2005 Ford Mustang Base

Question type: General

Ford Mustang 2005 coupe. the manuel says have the over drive off in hilly terrain... does that include mountain passes where i will be traveling about 60 mph? my thought is no not have it turned off, but i truly dont know the right answer. (my first time with this whole OD ON/OFF situation.

5 Answers


The answer is Yes Turn if OFF. What the manual says, a mountain pass is 'hilly' Allow your engine to run at 3000 - 3500 rpm, or even faster (I don't know what the red-line is in your car but don't keep it at that) when going up or down a steep hill. If not, it may lug a bit, and that's not good. Then put it back in O/D on level or mild grade. If you are going downhill and find you are riding brakes to keep from speeding, kick it out and let engine help maintain downhill speed

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Best Answer

http://www.mustangspecs.com/years/05.shtml spec say the 4.6L- V8 has a red line of 6250 rpm for the SOHC 3-valve.....and 6100 for the 6.0 - V6. Running it @ 4000+ rpm is just fine

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FordNut. you are awesome. you have calmed my nerves. Thank you so much for your answer. :)

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My pleasure

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I live in the mountains and drive to the "big City" often and there are some pretty steep grades, and I run my Toyota @ 3800 - 4000 for long stretches. Never a problem. And I have a typo up there, 4.0 V6 not 6.0

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