oefootball,
with your RC lift, does your upper control arms ever hit the upper coil bucket when going over a large speed bump or anything.
I have RC 3in spindles, 2.5in coil spacers and 3in rear block and i always get a huge clack up in the front due to uca hitting.

 

nope, it doesn't and I have hit some stuff that has gotten me air and nothing when I hit the ground. Just give them a call or email them or something.

 

Just to add some numbers:
My truck with 35's and 4.56 gears (and a whole lotta weighty extras - just shy of 7000 lbs. on the junkyard scale)
All around driving (mostly in-town, some 45 & 55 mph hiways) 13.6 mpg

Last trip to the Ga. farm & back (360 miles each way, 80% Interstate at 75-78 mph. w/650 lb. ATV in the bed) 15.4 mpg

When bone stock it was roughly the same in all-around driving but the interstate trips w/o ATV in the bed were substantially better at about 17.5 mpg...

 

You guys are getting great gas miliage! I've got an 03 2500 with 315 x 70 x 17"'s and my overhead says I get about 12 if I'm being good. Highway I can squeak out 14 w/o A/C running.

I'm thinking about going back to the 285's

 

oefootball,

Are you running my same set up? 3in spindles and 2.5 coil spacers?
I emailed them...no response.
Called them and the man said "we dont have that problem" and that was that.
unfortunately they have poor customer service.

speaking of MPG, everyones seems really good.... I have stock 20in rims with 35in tires and stock 3.92 gears. Am i getting worse MPG then i would if i regeared to 4.56's?

Thanks guys

 

Around town you would get better mileage with 4.56s without a doubt. Probably not much different on the interstates. But your PERFORMANCE will be a lot better with 4.56s and those 35s on 20s!!!
I went from 3.92s to 4.56s within about a month after lifting and going to 35's on 17s and could tell a night/day difference, especially off the line and when accelerating to pass someone...

 

how much does re gearing normally cost, to go to the 4.56?
just in general...

 

Mine?

Rear - Free (By Me)

Front - 400 Cash

Yours Is A 2WD.. Thats The Easy One, LoL

 

it wouldnt be on this truck, the next one that WILL be 4X4.

i probally wouldnt do it myself, bc i dont think i could do it, and how much are the parts?

 

the orignal post
of dropping from the 'normal' 5.7 Ram 4x4 MPG of 18 at 71 mph
down to 16 MPG because of hard rolling tires
and then further dropping
to 14 MPG at 71 mph with 4.56 diff gears
sounds
'in the ballpark'
for MPG losses to me

A new off the lot
2007 Ram 5.7 Powerwagon with its factory 4.56 diff gears
got a steady 14 MPG
heading south out of Wilmington NC on a very flat I-40
at a GPS measured 70 mph,
but there was only 160 miles on the odo
and the tires had new deep tread that rolls harder

In just a few months
you will be able to test drive nearly identical 5.7 Rams
with 3.21, 3.42, 3.55, 3.92, 4.10 and 4.56 diff gears
all from the factory