Soo curious what others run with 4.56 gears rpms wise i have 33s with 4.56 5 inches of lift... soo wondering what other get at 45 mph and 70mph ....i know bumpers and racks how many tools you carry all count towards that....soo no flamming please XD

 

Actually, the weight, aerodynamics, and lift make no difference. An otherwise stock Cherokee on 33s with 4.56 gears will turn the same RPM at 45 mph as a lifted Cherokee with a winch and 15 bags of concrete in the back seat.

RPM will be dependent on what transmission and engine combination you have and what gear you're in. An AW4 mated to a 4.0L may not lock the torque converter at 45mph (resulting in a 1:1 ratio), this would result in an RPM of 2089. With the torque converter locked (1:0.75 on the AW4) it would result in an RPM of 1567 at 45 mph.

70 mph would be 2438 rpm (AW4/4.0L).

 

http://www.grimmjeeper.com/gears.html

 

4.56s on 32 inch swampers. Mine is a POS so wont be going 70mph haha. mine will run around 1500-1600 RPM at 45 mph and at 60 mph roughly 2000 RPM.

I deleted the Mech fan and have an electric 2 speed fan. I think that keeps my RPMS low enough to feel right.

 

thanks

 

4.56's; 33x12.50's; AW4 and 4.0. At 65 mph I'm right about 2250 or so. I tend to not above above that as mpg's REALLY drop for me above 65.

 

im getting 16-18 what about you ?

 

City I'm about 12 and hwy I'm at 15-16 but I also have a roof rack, bumper and winch, and I keep tools and gear in the back at all times.

 

Damn dude I also have 4.56 gears. ...curious how much a roof rack does take away need to take mine off sometime... my buddy said he got about two more miles to the gallon

 

that's about the increase I get when i remove mine. The thing is like having a friggin billboard on the roof at hwy speeds.