AUTOMATIC TRANSAXLE SYSTEM (for 1AZ-FE) PRECAUTION

Note

Perform the Reset Memory procedures (A/T initialization) when replacing the automatic transaxle assembly, engine assembly or ECM Click here.

Note

• The automatic transaxle is composed of precision-made parts, necessitating careful inspection before reassembly because even a small nick could cause fluid leakage or affect performance.

• The procedures are organized so that you work on only one component group at a time. This will help avoid confusion with similar-looking parts of different sub-assemblies being on your workbench at the same time.

• The component groups are inspected and repaired from the converter housing side.

• Whenever possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups.

• Use of Toyota Genuine ATF WS is recommended.

• All disassembled parts should be washed clean, and compressed air should be blown through any fluid passages and holes.

• Dry all parts with compressed air. Never use cloth.

• The recommended ATF or kerosene should be used for cleaning.

• After cleaning, the parts should be arranged in the order they were removed for efficient inspection, repairs, and reassembly.

• New discs for the brakes and clutches that will be used for replacement must be soaked in ATF for at least 15 minutes before reassembly.

• All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with ATF prior to reassembly.

• All old gaskets and rubber O-rings must be replaced.

• Do not apply adhesive cement to gaskets and similar parts.

• Make sure that the ends of the snap rings are not aligned with any cutouts. Also make sure that snap rings are correctly installed into the grooves.

• If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced.

• Check the thrust bearings and races for wear or damage. Replace them if necessary.

• Use petroleum jelly to keep parts in place.

• When working with FIPG material, perform the following:

  Using a razor blade and gasket scraper, remove all old FIPG material from the gasket surface.

  Clean all components thoroughly to remove all foreign matter.

  Clean both sealing surfaces with a non-residue solvent.

  Apply FIPG material in a continuous line on the sealing surface.

  Reassemble parts within 10 minutes of applying FIPG material. Failing to do so will require the FIPG material to be removed and reapplied.