The transmission solenoids are located under the side cover of the transmission. The side cover comes off with the transmission still in the car, but it's quite a job, especially if you don't have a lift.
Injuries or conditions that affect the chest wall -- the rib cage and associated muscles -- are another common cause of pleuritic chest pain. Chest muscle strain due to strenuous exercise may cause pain experienced primarily with deep breathing. Vigorous activity can also lead to costochondritis, a condition involving inflammation of the connective tissues of the rib cage.
Chest pain is also caused by irritation and swelling of the heart (myocarditis) or its outer covering (pericarditis). This inflammation can be caused by an infection or happen after heart attack or heart surgery. Pain from myocarditis or pericarditis is usually is sharp and in the center of the chest. It tends to get worse when you breathe, lie down, cough or swallow. Sitting or leaning forward sometimes reduces the pain.