The 3.73 would give you better mpg's

 

from my view of thinking a 3.55 rear ratio would give him better mileage from a lower rpm at highway speeds, correct me if i'm wrong that's what i always thought

 

That's correct. A numerically bigger number means a higher RPM, but the sweet spot for these engines might be right where the 3.73's hit.

The V10's are like that. They get better MPG with a smaller (numerically higher gear) that gets the truck into the sweet spot of the RPM band easier and quicker.

This is just a guess though. The forum experts will have to chime in on your inquiry.

Stewart

 

Hey Ken, I sent you a PM. I wouldn't mind seeing a copy of my window sticker if you can find it.

 

You're correct.

Stewart, unlike the 6.8L, these trucks seem not to have that mystical "sweet spot". They run about the same regardless of the gear, but the gear does affect the mileage. The 3.55 should return slightly better MPG than that 3.73 like I have. But the 3.73 does get up and move...especially with one of Mike's 93 Perf tunes!

 

thanks guys sorry for the late reply been away from the computer due to work