05 F350 Crew Cab pulling 12k horse trailer? - Ford Powerstroke Diesel Forum
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Old 01-19-2012, 10:38 AM
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05 F350 Crew Cab pulling 12k horse trailer?

What is the best speed to pull with in a 4:11 rear end? i used to 3:73 im not a speed demon usually around 65-70mph....what speed works the best for fuel milege on this trailer
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Old 01-20-2012, 05:12 PM
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Around 65 is you best milage, faster than that and you'll just burn more fuel, plus at 65 it's easier on the trailer tires.
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Old 01-20-2012, 05:19 PM
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I think they're 4.10s though right? Anyway, I like keeping it about 60-65.
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Old 01-21-2012, 05:29 AM
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I normally go more by the tach then the speedo. Keep it right about or under 2k rpms.
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Old 01-21-2012, 06:01 AM
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Quote:
Originally Posted by SCPowerstorkecowgirl View Post
What is the best speed to pull with in a 4:11 rear end? i used to 3:73 im not a speed demon usually around 65-70mph....what speed works the best for fuel milege on this trailer
Welcome from SC! Ya like they said, anything over 2k, the mpg starts goin downhill.
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Old 01-21-2012, 07:39 AM
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Originally Posted by TurboMustang370 View Post
I normally go more by the tach then the speedo. Keep it right about or under 2k rpms.
Well that's what I meant. For 4.10s 60-65 is just about perfect.

But you also wanna keep the trans from hunting gears back and forth.
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Old 01-25-2012, 06:47 PM
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Try to stay right around 2000-2100 rpms, below motor will lug down and use more fuel and doesn't pull well.
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