towing capacity for dodge ram 2500
I have a 2004 dodge ram 2500 with a small lift and 35 inch tires. I was pulling a 33' rockwood ultra lite. Some small delam occurred above the slide and my insurance company totaled the camper. Now I ...
Forum Discussion
Going from 3.73 to 4.10 may give another 2000 lb tow capacity but that comes only with stock LT265/70-17 E at about 31.5" diameter tires.
Part of the tow rating numbers is determined by engine rpms.
stock 31.5" tires and 3.73 ratio @ 60 mph = 2387 rpm direct drive.
...................... 4.10 ratio @ 60 mph = 2624 rpm dd.
35" tires with a 4.10 gears at same speed = 2361 rpm dd.
Point is the 4.10/35" tires puts the engines rpm back in rpm range for stock tires.
Now if you used the 4.56 gear set/35" tires = 2626 rpm. Now you have gained a 2000 lb tow capacity. However 35" tires are heavy/tall with lots of parasitic drag compared to stock tires.
One thing in your favor is the Cummins. Tall heavy tires don't affect the diesel power like a gasser.
Just something to chew on
Part of the tow rating numbers is determined by engine rpms.
stock 31.5" tires and 3.73 ratio @ 60 mph = 2387 rpm direct drive.
...................... 4.10 ratio @ 60 mph = 2624 rpm dd.
35" tires with a 4.10 gears at same speed = 2361 rpm dd.
Point is the 4.10/35" tires puts the engines rpm back in rpm range for stock tires.
Now if you used the 4.56 gear set/35" tires = 2626 rpm. Now you have gained a 2000 lb tow capacity. However 35" tires are heavy/tall with lots of parasitic drag compared to stock tires.
One thing in your favor is the Cummins. Tall heavy tires don't affect the diesel power like a gasser.
Just something to chew on
