[mikeincali64]

NYPDBlue: I started out with 20psi in all tires and it worked well. I mainly used 2WD until climbing the smaller dunes when I switched into 4WD. But when I tried to climb the monster hill Oldsmobile (or any giant hill) I had to let down to 12psi. Then, no problem. Just running around in the sand, 20 worked great. I have the same exact tires as you: 305/65/18's on the stock TRD wheels.

The only problem with tire pressure is getting the air back in! I have a portable compressor but it will go back to walmart noted as trash! I need one that will pump up in without having to take a nap in the meantime.

Click on the thumbnail to checkout the hill from the top looking down at the startpoint. Also, you can see 2 giant white Big Fords that are lifted about 6 feet! These are street trucks that are as lifted as monster trucks.