CM871 fuel mileage

[superbudy208]

I think a lot of the problem is with the gearing of the truck, @ 75mph it's at 1550rpms in 10th, @ 70 its running 1350 to 1400rpms, and 9th at 58mph is 1600rpms,if I go slower in 10th it lugs it it to much, it does have power its not low well I don't think so anyways, the turbo fluttering almost seems like it popping back through the intake under hard load load sometimes its worse than others, I'm going to run the overhead again and make sure it was done right, I do want to drop the cans but it'll be a week or 2 before I get a chance to.

I've been trying to shift it higher and but it has a problem running in 9th it goes to 1700 and won't go higher then after 15 seconds it slows down to 1500 and you cant push it back over 1600 rpms, I'm going to check with the dealer and see if they can adjust it, I've talked to a few people about programming it, but not really sure I want to go that way.

Also I've called Hagg several times but they never call me back so

I don't really want to do an in-frame on it, that's why I keeps the rpms up but its killing me on fuel and need's the front structure done soon to. Also looking for some 3.55 or 3.73 gears and waiting to hear on a Volvo with a 13 speed that has bad cams trying to figure out which way to go still