I have a 2001 toyota 4 runner i love the truck but it's a scary ride. The back end sways from side to side. I described the problem to a mechanic and they said it's the tires. I replaced them and that did not fix the problem. HELP!!

I have seen this a couple times. The last one I had would be running down the highway perfectly normal, thenyou could hit a bump or rough spot on the pavement, and the thing would start shaking violently, almost bad enough to loose control of the vehicle. The customer said that this started gradually and continued to get worse. Upon inspection of the rear suspension, I found that all 4 of the trailing arms that hold the differential in place had badly worn/loose bushings. Replacing all of the trailing arms fixed it. Toyota is really proud of their (junk) trailing arms - they cost the customer almost $200 each.