Don't know much about rear wheel drive vehicles. But when the car is on all 4 wheels on the ground. I push the back left tire and wobble it and it makes a clunking noise like if a bearing is shot but I'm not to sure. I've been having trouble with getting this vehicle to steer properly at 60mph or higher. Feels shaky at certain speeds on the highway and if I don't keep my hands on the steering wheel it decides to pull really hard to the right than it'll pull back to the left depending on the wind conditions. Any ideas? It happens on both back wheels by the way.