What consider high RPM’s

[Corbett Fulton]

New to the dodge world, just bought a 2005 5.9, i was wondering what is considered high RPM’S cruising 70 mph. It sounds like the truck wants to shift into a higher gear.

 

[Bob4x4]

Your fuel efficiency drops rapidly above 2k but it won’t hurt anything.With 4.10s and stock tires they do start getting louder as the mph goes over 65.

 

[Ozymandias]

Yeah depends on the axle ratio.

In general, you want to be above 1800rpm to get full boost, everything below it will downshift to soon.
2500 I would consider to high for cruise.

 

[AH64ID]

New to the dodge world, just bought a 2005 5.9, i was wondering what is considered high RPM’S cruising 70 mph. It sounds like the truck wants to shift into a higher gear.

What transmission? How many rpms?

 

[JohncJordanIII]

Me personally with 4.10 stock tire size, 48re od lock out so 3rd gear @ 1900-2000k 40-45 mph. Highway 65 is about 1850-1950 I think depending on hills/load in 4th. 2150 ish I think for 70 mph.