I'm with TreeClimber. I went with the ported PSC bigbore box for my LJ. Swapped the PSC pump and reservoir that I was running in my TJ I had to go with it along with their dual cooler setup for it and trans. So far I haven't had a need for the ram assist with the 37s. I am sure I'll get to where I do. But that bigbore box turns with ease on trails when unlocked up front.