Lexus GS, SC 1998-06

Removal & Installation

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Click image to see an enlarged view

Fig. Exploded view of the rear halfshaft and related components-except ES 300

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Rear tire and wheel assembly
     
    Cotter pin, locknut cap, and locknut
     
    Height control sensor, if equipped
     
    2 exhaust pipe support brackets, if necessary
     

  4.  
  5. Place matchmarks on the halfshaft and the side gear shaft. Remove the 6 hex bolts and 2 washers.
  6.  
  7. Hold the inboard joint side of the halfshaft so the outboard joint side does not bend too much. Tap the end of the halfshaft with a rubber mallet to loosen it from the axle hub and remove the halfshaft.
  8.  

To install:

  1. Insert the outboard joint side of the halfshaft through the axle hub. Align the matchmarks on the side gear shaft and the halfshaft.
  2.  
  3. Coat the threads with clean oil and install the hex bolts. Tighten the bolts to 61 ft. lbs. (83 Nm).
  4.  
  5. Install or connect the following:

    Exhaust pipe support brackets, if removed, and tighten to 14 ft. lbs. (19 Nm)
     
    Bearing locknut, if removed, and have a helper apply the brakes. Tighten the locknut to 213 ft. lbs. (289 Nm).
     
    Lock cap and a new cotter pin
     
    Height control sensor, if removed
     
    Rear tire and wheel assembly
     
    Negative battery cable
     

  6.  



Click image to see an enlarged view

Fig. Exploded view rear drive shaft assembly-SC 430

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Rear tire and wheel assembly
     
    Cotter pin, locknut cap, and locknut
     
    Front center floor brace
     
    2 exhaust pipe support brackets, if necessary
     
    Rear lower suspension member brace
     
    End body mounting set plate
     
    Rear suspension member brace
     
    Rear wheel speed sensor
     
    Toe control link assembly
     
    Upper control arm assembly
     
    Rear drive shaft assembly
     

  4.  

To install:

  1. Insert the outboard joint side of the halfshaft through the axle hub. Align the matchmarks on the side gear shaft and the halfshaft.
  2.  
  3. Coat the threads with clean oil and install the hex bolts.
  4.  
  5. Install the remaining components reversing the removal procedure.
  6.  
  7. Perform speed sensor signal test.
  8.  

  1. Drain the gear oil.
  2.  
  3. Remove or disconnect the following:

    Rear driveshaft
     
    Side gear shaft
     
    Snapring from the side gear, using a suitable tool
     
    Side gear shaft oil seal
     

  4.  

To install:



Side gear shaft oil seal
 
New oil seal
 

  1. Check installation of side gear shaft. There should be 0.08-0.12 inch (2-3mm) of play in the axial direction. Check that the side gear shaft will not come out by pulling on it.
  2.  

  1. Remove or disconnect the following:

    Gear oil
     
    Rear driveshaft
     
    Side gear shaft
     
    Snapring from the side gear
     
    Side gear shaft oil seal
     

  2.  

To install:

  1. Install or connect the following:

    Side gear shaft oil seal
     
    New oil seal
     
    Multi-Purpose (MP) grease to the oil seal lip
     
    Side gear shaft
     
    Snapring from the side gear, using a suitable tool
     
    Side gear shaft oil seal
     
    Gear oil
     

  2.  



Click image to see an enlarged view

Fig. Exploded view of the rear halfshaft and related components-except ES300

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Rear tire and wheel assembly
     
    Cotter pin, locknut cap, and locknut
     
    Height control sensor, if equipped
     
    2 exhaust pipe support brackets, if necessary
     

  4.  
  5. Place matchmarks on the halfshaft and the side gear shaft. Remove the 6 hex bolts and 2 washers.
  6.  
  7. Hold the inboard joint side of the halfshaft so the outboard joint side does not bend too much. Tap the end of the halfshaft with a rubber mallet to loosen it from the axle hub and remove the halfshaft.
  8.  

To install:

  1. Insert the outboard joint side of the halfshaft through the axle hub. Align the matchmarks on the side gear shaft and the halfshaft.
  2.  
  3. Coat the threads with clean oil and install the hex bolts. Tighten the bolts to 61 ft. lbs. (83 Nm).
  4.  
  5. Install or connect the following:

    Exhaust pipe support brackets, if removed, and tighten to 14 ft. lbs. (19 Nm).