The source of most transaxle problems is apparent from the symptoms. For example, difficulty in engaging a gear, shuddering when releasing the clutch, or a vague shifting mechanism are all transaxle problems. Other symptoms, such as power loss or noises from the front end, are less specific. Power loss may be due to an engine problem, or to a slipping clutch. Noises may be the result of a failure in the gear train, worn constant velocity joints, or a bad wheel bearing. What appears to be a transmission oil leak may be engine oil leaking from a faulty rear crankshaft oil seal, especially if the leak is near the bottom of the transaxle bellhousing. See ENGINE for information on crankshaft oil seals. See SUSPENSION AND STEERING for information on constant velocity joints and wheel bearings.