What is a good pressure to run on these TJ Jeeps. 31x10.5x15 BFG all terrains. They have 45 all around. Seems like too much for a light vehicle. Maybe 43 in front and 40 in the rear?  

thats way to much.ive never put more than 35psi in any of my tires.you could do the chalk trick to see what your wear pattern is,but i would run around 32 to 35 in them max.  

I run 35 on the highway and 10 to 12 on the trails.  

there should be a white sticker either on door well or on the door somewhere that tells you what the tire pressure should be. that is if you are running the size tires that are recommended. but yeah, like 32-35 highway, 10-12 on the trail. if they are like load range E it might say the max on the tire is like 44 psi but go by the sticker on or near the door.

I run 35 all the way around. unless I'm off road then I air down to 18 -20 depending what we are going through that day  

I would run 35 in the summer on my Grand and drop that to 30 in the winter. Trails i left it alone since most stuff i did was just old loggin roads. Even my truck now that i have im at 35 and its a 3/4 ton.