Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Lexus RX 330 AWDFACTORY OEM SERVICE PROCEDURE
Transfer System (4WD): Precaution
NOTE:
When disconnecting the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.
SYSTEM INSPECTION
| System Name | Action |
|---|---|
| Lighting System (Adaptive Front-Lighting System) | PRE-CHECK |
| Power Window Control System | PRE-CHECK |
| Power Back Door System | PRE-CHECK |
| Sliding Roof System | PRE-CHECK |
- Before disassembly, clean the transfer assy of any sand or mud to prevent it from entering inside the transfer during disassembly and assembly.
- When removing any light alloy part such as a transfer cover, do not pry it off with a tool like a screwdriver, but tap it out with a plastic hammer instead.
- Always arrange the removed parts properly and protect them from dust.
- Before installation, clean and dry all parts completely, and then apply hypoid gear oil to each part. Do not use alkaline chemicals when cleaning aluminum, rubber parts, or ring gear set bolts. Also do not use any cleaning oil (ex. white gasoline) to clean the rubber parts such as O-rings and oil seals.
- Apply hypoid gear oil to any sliding surface or rotating part.
- Do not directly hold a part in a vise. Make sure to put an aluminum sheet between them.
- Replace any damaged or deformed snap ring with a new one.
- If there is a scratch on the contact surface of the case, it may cause oil leakage. Therefore, be careful not to damage the contact surface when handling it.
- Before applying a sealant, completely remove any old sealant stuck on the parts and clean with white gasoline.
- Do not add oil immediately after installing sealed parts. Leave for 1 hour or more.
- Scratches on a contact surface of an oil seal, O-ring or gasket may cause oil leakage. Be careful not to damage the contact surface when handing the seals.
- When press-fitting an oil seal, be careful not to damage the oil seal lip and around it.
- When replacing a bearing, replace the inner and outer races as a set.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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