The types of jobs an engineer can work on depend in large part on what type of engineering specialty they work in. Scorpio Design Services is a consulting business that provides Mechanical Engineering services. Guy Algar, co-owner, has been a Mechanical Engineer for over 25 years and has worked on a wide variety of projects including the design of weigh scales (used by food processing plants, tobacco companies, and really any company that relies on weighing their product), vacuum processing (again, the uses for vacuum processing are varied and numerous), and even in nuclear plant design. Mechanical Designers create CAD drawings which supply the specs for every detail of how parts fit together in a mechanical application. Drawings are usually then given to the manufacturing department, who use the drawings as their "blueprint" in creating the parts and pieces, and sometimes to the installers so that they know how everything is to fit together when assembled. It's a complicated process that truly does begin with the engineers. www.scorpiodesignservices.com
Links: www.scorpiodesignservices.com

Most commonly its a linkage concern, take it to your local garage and have them test drive it and inspect for underlying issues.