i have an 06 with 400 miles on it and at 75 mph its only turning 1900 rpms , at 70 its 1800 and 60 at 1500 im happy as a clown if this is right!!!
:cool2:

My goodness. I run 2250 @75.

Thats the 6th gear for ya... If you dont want it just send it my way...


Drew

I run 1600 at 75 with 35's.

1600@75....what 'am I doing wrong. Nice try Drew. I think I'll hang on to it for a while. Thanks for the offer though.

thats cool. what are som of you guys with 285's running for rpm's at 70 and 75? i'm thinking of stepping up to 33's just for the sake of dropping rpm's and milage.

2250@75 with 285's. Look at people's sig.

oh yea.... a friend of mine with an 01 cummins 6spd with gearvendor is pulling 1400rpms at 75mph. :eek:

when are those gearvendor guys going to come out with something for my allison?!?!

I have 315/70/17 tires. 1950 @70, 2050 RPM @75, 2150 RPM @80

I WISH I had a 6th gear

I bet your MPG will be great.

i have an 06 with 400 miles on it and at 75 mph its only turning 1900 rpms , at 70 its 1800 and 60 at 1500 im happy as a clown if this is right!!!
:cool2:

That's the same as mine, well it was before I added the 265/70/17's

my 04 is about 2250 at 75 as well. I dont see how the 06s with low cruising rpms, have enough torque at part throttle without a programmer, to get decent milege... Anyone see this coming. My dads dodge runs like 1600 at 65, but has the torque, inlines handle this easier as well with the length of rod they are running, and he gets well over 20mpg hwy. Ive been through this with overloaded 1/2 ton chevys in the past, lowering the rear gears helped milege to get the cruisinjg rpms closer to the torque power band. Anyone?