I run spacers on most of my cars. The trick is to make sure the mounting surfaces are clean from debris and rust. I usually hit them with a green scrubbie everytime I rotate them. And the biggest thing, is to torque the wheels in the air. No load on the tires. Just have someone hold the brake...
I'm in the market for a 4runner. Is there a way to test or engage DAC to make sure it works before buying? I've looked at a few, and when I engage it i just get blinking lights. I'm really not familiar with the system and new to the 4X4 world.