357Bronco
Bronco Guru
The single biggest improvement for me, was the limited slip up front and locker in the back. Any tire without power is an anchor. Then it was removing weight, and paddle tires. And a little motor never hurts either.
Probably just dont have the power what axle gears do you have? I would suggest 4.10's for 33in tires. Sand sucks the power and even more so with wide tires that are aired down. Might try leaving them pumped up more.
are you a one wheel wonder?
Are you driving it like you stole it? That is how I handle sand. I dont worry about air pressure, just tire speed. You need a hot motor and good gearing.
8-10 psi with the 33/12.50/15s and a rear locker you should be able to go absolutely anywhere. I have taken my bronco all over Glamis dunes. Like mentioned before in this post, plan ahead and always stop pointing down hill, it makes all the difference.
You might want to check to see the gearing is correct! I purchased a 69 several years ago and it would hump up on hard surface in short order, and wouldn't climb worth beans. I found out the PO had swapped in some higher gears in the rear.
Good luck, Bryan