3T40 (125/125C) Automatic Transaxle

Most oil leaks can be located and repaired by visually finding the leak and replacing or repairing the necessary parts. On some occasions an oil leak may be difficult to locate or repair. The following procedure may help in locating and repairing most leaks. Also see additional information about oil leak diagnosis.

Finding The Leak
1. Identify the oil, determine whether it is engine oil, automatic transmission oil, power steering oil, etc.
2. To find where the oil is leaking from, Drive the vehicle a minimum of 15 miles (24 kilometers) to reach normal operating temperature, park the vehicle over a large sheet of paper. After a few minutes, you should be able to find the approximate location of the leak by the drippings on the paper.
3. Visually check around the suspected component. Check around all gasket mating surfaces for leaks. A mirror is useful for finding leaks in areas that are hard to reach.
4. If the leak still cannot be found, it may be necessary to clean the suspected area with a degreaser, steam or spray solvent. Clean the area well, then dry the area. Operate the vehicle for several miles at normal operating temperature and varying speeds. After operating the vehicle, visually check the suspected component. If you still cannot locate the leak, try using the powder or black light and dye method.

Powder Method
1. Clean the suspected area.
2. Apply an aerosol-type powder (such as foot - powder) to the suspected area.
3. Operate the vehicle under normal operating conditions.
4. Visually inspect the suspected component. You should be able to trace the leak path over the white powder surface to the source.

Black Light and Dye Method
A dye and black light kit is available for finding leaks. Refer to the manufacturers directions when using the kit.
1. Pour specified amount of dye into leaking component.
2. Operate the vehicle under normal operating conditions as directed in the kit.
3. Direct the light toward the suspected area. The dyed oil will appear as a brightly colored path leading to the source.
- See kit directions for the color of the oil and dye mix.