Automatic Transmission System: Precaution: Precaution

• When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .
• If any parts are replaced, perform the following as necessary referring to the table below.

  Replaced Parts		Reset Memory*1	Set Transmission Compensation Code	Learning by Driving (Road Test)
  Automatic w/transfer transmission assembly		-*2	Perform*3	Perform
  Valve body assembly Shift solenoid valve SL1, 2, 3, 4 or 5		-	-	Perform
  TCM (If possible, read the transmission compensation code from the previous TCM)	Possible	-	Perform*4	Perform
  	Impossible	-	Perform*5	Perform
  Engine assembly ECM		Perform	-	Perform

Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

• 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.