Automatic Transmission/Transaxle: Service Precautions

AUTOMATIC TRANSMISSION SYSTEM

PRECAUTION

NOTICE:
^ When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.





^ If any parts are replaced, perform the following as necessary referring to the table.





HINT:
^ *1: RESET MEMORY cannot be completed by only reconnecting the cable to the negative (-) battery terminal.
^ *2: When "Set Transmission Compensation Code" is performed, "RESET MEMORY" is automatically completed.
^ *3: New automatic transmission's compensation code.
^ *4: Read compensation code from previous TCM, then transfer to the new TCM.
^ *5: Set transmission compensation code of the current automatic transmission.
^ Registration of the transmission compensation code.
^ Learning by driving (Road Test).
^ RESET MEMORY.

NOTICE: RESET MEMORY cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

CAUTION: When using compressed air, always aim away from yourself to prevent Automatic Transmission Fluid (ATF) or kerosene from spraying on your face.

NOTICE:
^ The automatic transmission 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.
^ When disassembling a valve body, be sure to match each valve with its corresponding spring.
^ 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.