Does anyone know if you can change out the stock 3.73 gears to something around a 4.56 ratio??? I have a 01’ Ram 1500 that I put bigger tires on. 285/75R16 when you hook a trailer on pulling down the highway it runs out of power on the flat. The gear ratio calculator says with that size tire a 4.56 would give me a 4.09 ratio. I know you can get a 4.10 ratio that should take it to a 3.80 ratio.

 

4X2 or 4X4? There are plenty of places that sell 4.56's. You are not using overdrive when towing are you?

 

I have 285's, and 4.56 gears, and its really too much gear for those size tires. 4.10's would be just about perfect.

 

Sure ya can but if you have 4x4 you have to change both differentials