05 F350 Crew Cab pulling 12k horse trailer?

[SCPowerstrokecowgirl]

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

[StarDriver]

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.

[jesilvas]

I think they're 4.10s though right? Anyway, I like keeping it about 60-65.

[TurboMustang370]

I normally go more by the tach then the speedo. Keep it right about or under 2k rpms.

[bwillis2003]

Originally Posted by SCPowerstorkecowgirl

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.

[jesilvas]

Originally Posted by TurboMustang370

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.

[StarDriver]

Try to stay right around 2000-2100 rpms, below motor will lug down and use more fuel and doesn't pull well.