Strange noise from what sounds like the suspension when I accelerate and then when I turn also. Truck was in Hawaii so that might have something to do with it. How do I get these noises to stop? Thanks

 

your 4 x 4 is disengaged by vacuum. when you accelerate you might slightly loose vacuum and TRY to reengage the 4 x 4 ?? Put the truck in 4H and do the accelerate and turn and see if the noise ( grinding ?) goes away.... if not, on to the next idea.