3408T cat and 740D trans and Brakesaver

[tqwrench]

Originally Posted by Mike Hohnstein

Harder on fuel than a 12v71, or so I'm told.

That sheet Jeff shared tells us the low HP variety will pull down 17 gallons per hour at 1900 RPM. She's a thirsty girl. Gets up to 41 gph on the biggun' at the governor. WOW.

[chiplamb]

1900rpm in a BB would be around 55mph, so just over 3mpg, I'll keep my 8V92!

[tqwrench]

Originally Posted by chiplamb

1900rpm in a BB would be around 55mph, so just over 3mpg, I'll keep my 8V92!

Yeah, but that 3408 would abide a 2.73:1 axle ratio in a bus like that, so you could run 70 MPH at 3 MPG

Sort of like the opposite of my uncle's '84 Chevy Van. He had a 305 paired to a 3.08 gear. That engine was killing itself to move that thing fully loaded. I tried telling him a 3.73 would give better fuel economy.

[Mike Hohnstein]

If it had a 700R, 4.10 would be the answer.