55mph red mark - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 05-05-2008, 11:24 PM Thread Starter
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55mph red mark

So i was driving home tonight on a 55mph. And got to thinking.....What is the red mark at 55mph mean on the speedometer??? This is on a 95 F250 Powerstroke. I have always wondered what this means??? Anyone the real reason???? Red usaully means something bad...when comparing to all the other gauges on the truck.

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post #2 of 16 Old 05-05-2008, 11:27 PM
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Ive always theorized that that was probly the projected speed where you would get the best fuel economy. Im not sure but I know allot of vehicles have it.



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post #3 of 16 Old 05-06-2008, 03:33 AM
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I think alot of it may be due to fuel economy, and when the trucks were new, that was real close to all highway speed limits for every state.

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post #4 of 16 Old 05-06-2008, 03:37 AM
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prob related to the old double nickel speed limit that is now extinct in most states.


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post #5 of 16 Old 05-06-2008, 03:55 AM
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I always assumed it was the speed limit in most areas such as here in Ohio on most roads.

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post #6 of 16 Old 05-06-2008, 04:34 AM
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You mean there are speed limits???? I didn't realize those things existed!!

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post #7 of 16 Old 05-06-2008, 05:08 AM
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It used to mean the max speed before the states all started upping the limits on the open highways. Or at least that was always my thought. They did away with it on the dashes when the limits increased to 65-70 and up.

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post #8 of 16 Old 05-06-2008, 05:10 AM
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I had read somewhere at some point(1970's I think) that it was determined that 55mph was the peak of fuel economy which is where the standard 55mph speed limit came from. But with the use of computer controlled engines and overdrive transmissions it has become somewhat obselete. Not sure why the automakers still put the mark there.

Granny, just because you can't read the signs anymore doesnt mean they got rid of the speed limit.

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post #9 of 16 Old 05-06-2008, 05:34 AM
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Quote:
Originally Posted by kinghawg98 View Post
prob related to the old double nickel speed limit that is now extinct in most states.
that is actually what it is. go find a newer vehicle and look at the speedo, you won't find it

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post #10 of 16 Old 05-06-2008, 06:19 AM
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Quote:
Originally Posted by 67ModStang View Post
Granny, just because you can't read the signs anymore doesnt mean they got rid of the speed limit.
Poor Granny. Let's give her the benefit of the doubt that she can still read.

Man, that was funny.

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