Toyota Sienna Service Manual: Precaution

The instructions here are organized so that you work on only one component group at a time. This will help avoid confusion caused by 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. Complete the inspection, repair and reassembly before proceeding to the next component group as much as possible. 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 some 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. Recommended: Toyota Genuine ATF WS 2. All disassembled parts should be washed clean and any fluid passages and holes should be blown through with compressed air.

3. Dry all parts with compressed air. Never use a shop rag or a piece of cloth to dry them.

4. When using compressed air, always aim away from yourself to prevent accidentally spraying ATF or kerosene in your face.

5. Only recommended automatic transaxle fluid or kerosene should be used for cleaning.

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

10. All gaskets and rubber O-rings should be replaced with new ones.

11. Do not apply adhesive cements to gaskets and similar parts.

12. Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the groove correctly.

13. When replacing a worn bushing, the sub-assembly containing the bushing must also be replaced.

14. Check thrust bearings and races for wear or damage. Replace them as necessary.