at 65mph I am running at 3000 rpm. Tis is a 6.4 with a five speed trans. It seems like it has no overdrive. Could this be true or is this normal. Ron

Asked by veepman Dec 21, 2007 at 09:05 PM about the 2008 Ford F-450 Super Duty Lariat Crew Cab LB DRW 4WD

Question type: Maintenance & Repair

Please let me know at veepman@san.rr.com

8 Answers

71,665

This sounds about right as most of my newer vehicles run about 2500-3k rpm at 65mph.

2 people found this helpful.
15

In an automatic, I would assume that 5th IS overdrive?

55

i own a 2008 f450 king ranch with the 488 gears at 65mph i run at just over 2 grand fer rpm

1 people found this helpful.
5

what gears are in it with a 373 gaer you should be for 1700 2000rpm did you push your override on its on the end of your gear shift

2,165

i would think that is too high... sounds like its either still in fourth or you have other issues... or one very tall gear in it...

1 people found this helpful.
455

is this a diesel? a diesel usually runs lower rpm's because thats where they generate the most power and are designed that way thus resulting in better fuel milage in a diesel, a gas job will usually run from 2500 to 3500 from 65 to 70 mph while the diesel may only be turning 1500 to 2200 rpms at the same speed

1 people found this helpful.
15

My 450 runs about the same Rpms and I took it to the dealer and they said 3k to 3500 is normal for a 6.4.

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