Automatic Transmission Overhaul - U151E, U151F: Overview Lexus RX II

Scheme 980

1. GENERAL DESCRIPTION Generally repair operations can be separated in the following 3 main processes: Diagnosis Removing and Installing, Replacing, Disassembling, Installing and Checking, Adjusting Final Inspection This article explains "Removing and Installing, Replacing, Disassembling Installing and Checking, Adjusting", but "Final inspection" is omitted. The following essential operations are not written in this article, however these operations must be done in the practical situation. Operation with a jack or lift (See «VEHICLE LIFT AND SUPPORT LOCATIONS»(ref-182527-S26162924732005080900000) ) Cleaning of a removed part when necessary Visual check
2. INDEX To assist you in finding your way through these articles, the task heading are given at the top of each procedure.
3. PREPARATION Use of special service tools (SST) and special service materials (SSM) may be required, depending on the repairing condition. Be sure to use SST and SSM when they are required and follow the working procedure properly.
4. REPAIR PROCEDURES Component drawing is placed at the task heading when necessary. Illustrations of parts are placed as the" disassembled parts drawing" so that it enables you to understand the fitting condition of the components. Non-reusable parts, grease applied parts, precoated parts and tightening torque are specified in the components drawing. Example: Tightening torque, oil applying position, and non-reusable parts are described as important points in the procedure. NOTE: There are cases where such information can only be indicated by an illustration. In that case, all the information such as torque, oil, etc are described in the illustration. Installing procedure of operation item is performed in the reverse order of the removing, and only the important points are described. Only items with points are described in the procedure, and the operational portion and content are placed using an illustration. In the explanations, details of the operational method, standard value and notice are placed. There may be a case where the illustrations of similar models are used. In that case the details may be different from the actual vehicle. The procedures are presented in a step-by-step format: The illustration shows what to do and where to do it. The task heading tells what to do. The detailed text tells how to perform the task and gives other information such as specifications and warnings. HINT: This format provides an experienced technician with a fast track to the necessary information. The task heading can be read at a glance when necessary, and the text below provides detailed information. Important specifications and warnings always stand out in bold type.
5. SERVICE SPECIFICATIONS Specifications are presented in bold type. You never have to leave the procedure to look up your specifications. The specifications are also found in the «SERVICE SPECIFICATIONS»(ref-238593-S35799037722006072500000) or «AUTOMATIC TRANSMISSION/TRANSAXLE (SPECIFICATIONS)»(ref-182547) articles for a quick reference.
6. TERMS DEFINITION: CAUTIONS, NOTICES and HINTS TERMS DEFINITION CAUTION Indicate the possibility of injury to you or other people. NOTICE Indicate the possibility of damage to the components being repaired. HINT Provide additional information to help you perform the repair efficiently.
7. SI UNIT UNITS are primarily expressed according to the SI UNIT (International System of Unit), and alternately expressed in the metric system and in the English System. Example: Torque: 30 N.m (310 kgf.cm, 22 ft.lbf)

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1. BASIC REPAIR HINT PRECOATED PARTS Precoated parts are bolts, nuts, etc. that are coated with a seal lock adhesive at the factory. If a precoated part is retightened, loosened or caused to move in any way, it must be recoated with the specified adhesive. When reusing precoated parts, clean off the old adhesive and dry with compressed air. Then apply the specified seal lock adhesive to the bolt, nut or threads. NOTE: Do the torque checking with the lower limit value of the torque tolerance. Depending on the seal lock agent to apply, there may be a case where it is necessary to leave it for a specified time until it hardens. GASKETS (When necessary, use a sealer on gaskets to prevent leaks. BOLTS, NUTS AND SCREWS Carefully observe all specifications for bolt tightening torques. Always use a torque wrench. TORQUE WHEN USING EXTENSION TOOL WITH TORQUE WRENCH In case of tightening by extending the entire length of the torque wrench combined with SST or tool, if you tighten until the reading of the torque wrench reached the specified torque value, the actual torque becomes excessive. In this text, only the specified torque is described. In case of using SST or extension tool, find the reading of the torque wrench by the formula. Formula T'=T x L2/(L1 + L2) TORQUE MEASURING FORMULA T' Reading of torque wrench {N.m (kgf.cm, ft.lbf)} T Torque {N.m (kgf.cm, ft.lbf)} L1 Length of SST or tool (cm) L2 Length of torque wrench (cm)

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