Grind Noise When Weight in Truck

toyota
tacoma
noises

#1

I own a 2006 Toyota Tacoma double cab, long bed. When I put weight in the back end, or I have a few people riding with my, there is a horrible grinding noise that sounds like it is coming from the back passenger tire. When I stop the noise stops. I also notice it if I take off quickly and I am by myself. Please Help!