[rgarthman1969]

What would be the best specs for fuel efficiency for a 2002 KW T600?

[rank]

depends on where you run and how much weight you're pulling.

[rgarthman1969]

Flatbed. Steel coils and lumber. Not sure of the weight though. Will be running midwest. Thanks for your help.

[rank]

Heavy loads but no hills.
If you want to drive 60 mph, I'd say an 11-ish litre engine, 13 speed, 4.11 rear, 24.5" rims.

[GMAN]

I own a T600 with a 3406E CAT w/a Super 10. I don't remember the rears, but would estimate they are around 3:35 or 3:55. I have been getting around 6.91 mpg lately.

[dieselmanic]

if you're hauling steel or lumber, you will always be close to 48000#. in that respect i would spec an ISX or such with about 450 hp 1650 tq, 13 spd, 3.55 gears and 22.5 lo-pro's. the 13 spd will let you split the upper end and 1650# of torque will let you keep it under 1500rpm to help with fuel economy. just my .02

[rgarthman1969]

Thanks for all of your replys. This information is very helpful. You all have a safe week.

[allan5oh]

Absolute best specs?

10 speed direct drive
2.64:1 rear gears
super singles

[rgarthman1969]

What kind of MPG are you all getting?

[dieselmanic]

a lot depends on driving habits and load and weather [headwind :x]. also engines play a part. newer engines tend to be more efficient due to better electronics. i guess what i'm trying to say is that it's hard to compare mpg's. i've had a low of 4.4 mpg's :sad: and up to 7.8 mpg's. like i said, it depends. 8)