poorrunner 
2011 Toyota 4Runner SUV SR5 4dr SUV 4WD (4.0L 6cyl 5A)
Quality Problem with Vehicle
 Vehicle shudders when driving.Most posts of forum sites indicate there is s systemic problem with the Transmission and Toyota is investigating.You will want to review this before you purchase:http://www.toyota-4runner.org/5th-gen-t4rs/89301-has-anyone-noticed-5.htmlThose that have purchased and have this problem can only pray Toyota supports their customers on this.The Service Departments say there currently is not a fix and we have to live with it for now.