Looking down the road at some mods to enhance mobility, I'm thinking about adding on board air, and lockers.
Up front, the Ram has a 9.25", while the rear receives an 11.5" ring gear both by AAM, American Axle Manufacturing. From the factory, this truck came with 3.42 gears. Many of these trucks came factory with a 3.73 ratio, designed to have a proper run out with a stock size tire (roughly 31"). But as soon as you upgrade to a larger tire, all of a sudden your RPM vs. speed are effected, even causing a disruption of the shift pattern on automatic transmission equipped trucks.
Lets give the example of a 37" tire. By using cross multiplication, we can determine that in order to have the same RPM vs. speed as with the factory tire size, you would want to install a 4.45 gear ratio (3.73/31*37). Unfortunately, in this scenario there is no such thing as a 4.45 ratio, the closest readily available gear set is 4.56. Or, you can also opt to go with a slightly higher ratio of 4.11 that would give a slightly lower RPM vs. speed compared to stock. IMO that might be the best compromise for power band and fuel economy when cruising the interstate.
So 4.11's will get the nod from me when the time comes, with an ARB locker ARB-RD139 in the rear and an ARB-RD197 up front. The ARB twin compressor should do the job for lockers and airing up tires. Recently I was wishing for a way to air up and down as the ride is pretty harsh at 65 psi offroad. I'm also waiting on Icon Alloys to release their new 17 inch wheels for the Ram so I can change them out for more sidewall and better trail-ability over the current 20 inch "bruh" rims.
Gears and dual lockers are going to be a chunk of change so this may be a minute given my recent expenditures so I'll be in the research phase for awhile.
Up front, the Ram has a 9.25", while the rear receives an 11.5" ring gear both by AAM, American Axle Manufacturing. From the factory, this truck came with 3.42 gears. Many of these trucks came factory with a 3.73 ratio, designed to have a proper run out with a stock size tire (roughly 31"). But as soon as you upgrade to a larger tire, all of a sudden your RPM vs. speed are effected, even causing a disruption of the shift pattern on automatic transmission equipped trucks.
Lets give the example of a 37" tire. By using cross multiplication, we can determine that in order to have the same RPM vs. speed as with the factory tire size, you would want to install a 4.45 gear ratio (3.73/31*37). Unfortunately, in this scenario there is no such thing as a 4.45 ratio, the closest readily available gear set is 4.56. Or, you can also opt to go with a slightly higher ratio of 4.11 that would give a slightly lower RPM vs. speed compared to stock. IMO that might be the best compromise for power band and fuel economy when cruising the interstate.
So 4.11's will get the nod from me when the time comes, with an ARB locker ARB-RD139 in the rear and an ARB-RD197 up front. The ARB twin compressor should do the job for lockers and airing up tires. Recently I was wishing for a way to air up and down as the ride is pretty harsh at 65 psi offroad. I'm also waiting on Icon Alloys to release their new 17 inch wheels for the Ram so I can change them out for more sidewall and better trail-ability over the current 20 inch "bruh" rims.
Gears and dual lockers are going to be a chunk of change so this may be a minute given my recent expenditures so I'll be in the research phase for awhile.
