where can i get a two speed rearend that will drop my rpms by 700?
who can build one?
anything is possable, its just a matter of how much.

 

probably cheaper to do a gear vendors overdrive unit?

 

As far as I know no one makes a 2 speed rear for our trucks. You could pick up a gear vendors unit for it if you want to drop your rpm. Here is the difference between high stock gear and high gear vendors gear with a fellow chapter members ride.

https://www.dieseltruckresource.com/...&postcount=556

 

or you can run the larger tires such as 22.5's