Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Precaution



(a) Prior to starting any work, clean the transfer assembly to prevent sand or mud deposits from entering the assembly.

(b) When removing any light alloy components such as the transfer cover, do not pry on the component with a screwdriver or similar tool. Tap the component loose using a plastic hammer.

(c) Always organize removed parts in the order they were removed and protect them from dirt.

(d) Apply Toyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent to each part after it is cleaned and completely dry prior to installation.

(e) Coat sliding surfaces and rotating parts with Toyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent if necessary.

(f) Do not use alkaline chemicals to clean aluminum parts, rubber parts, or ring gear set bolts.

(g) Do not use any cleaning solutions (ex. Non-residue solvent) to clean rubber parts such as oil seals. Apply sufficient hypoid gear oil to any sliding or rotating parts.

(h) Do not hold any parts directly in a vise. Always use aluminum plates between the part and the vise.

(i) Replace any damaged or deformed non-reusable parts.

(j) Do not allow scratches on the transfer case contact surfaces. Scratches may lead to oil leakage.

(k) Before applying seal packing, completely remove any old seal packing remaining on the components using a non-residue solvent.

(l) After installing components, do not allow oil to contact the seal packing for at least 1 hour. Do not allow scratches on any oil seal or gasket contact surface. Scratches may lead to oil leakage.

(m) When press-fitting an oil seal, be careful not to damage the lip of the oil seal or the surrounding surfaces.

(n) When replacing a bearing, replace both outer and inner races as one set.

(o) When replacing a bearing, do not apply force to the roller or retainer.

(p) When replacing a hypoid gear, replace the ring gear and driven pinion as a set.

(q) New bearings are coated with anti-rust oil. If using a new bearing, do not wash it off.

(r) If the threads or contact surface of a bolt is excessively rusty, replace the bolt.

    Transfer System

    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of pr ...

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