Transmission Control Systems: Service Precautions

U760E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

1. TROUBLESHOOTING PRECAUTION

NOTICE:
* If automatic transaxle parts are replaced, perform the following as necessary referring to the table below:
* Registration of the transaxle compensation code Registration.
* Initialization of the transaxle compensation code Initialization.
* Road test Road Test.
* Reset Memory (learned values) Initialization.

Parts Replacement Compensation Table





* Reset Memory cannot be completed by only disconnecting and 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 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 or 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, the following must be observed:
* Using a razor blade and a gasket scraper, remove all the old packing (FIPG) material from the gasket surface.
* Thoroughly clean all components to remove any loose material.
* Clean both sealing surfaces with a non-residue solvent.
* Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must be removed and reapplied.