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    1998 Chevrolet Truck Astro Van AWD 4.3L SFI 6cyl

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    Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

    Removal & Installation

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    1. Before servicing the vehicle, refer to the Precautions Section.
    2.  
    3. Remove or disconnect the following:
      CAUTION
      Failure to disconnect the intermediate shaft from the rack and pinion stub shaft may result in damage to the steering gear. This damage may cause a loss of steering control and may cause personal injury.


      NOTE
      Set the steering shaft so that the block tooth on the upper steering shaft is at the 12 o'clock position. The wheels should be straight ahead. Set the ignition key lock to the LOCK position. Failure to follow these procedures could result in damage to the SIR coil assembly.



      Negative battery cable
       
      Front wheels
       

    4.  
    5. Remove or disconnect the following:

      Intermediate steering shaft lower pinch bolt from the steering gear stub shaft
       
      Intermediate steering shaft
       
      Both tie rod ends from the steering knuckles
       

    6.  
    7. Support the frame at the center rear.
      NOTE
      DO NOT lower the frame too far. Engine components near the firewall may be damaged.

    8.  
    9. Remove or disconnect the following:

      Frame bolts from the rear of the frame. Lower the frame slightly
       
      Power steering pressure line from the steering gear
       
      Power steering return hose
       
      Magnasteer Variable Assist electrical connector from the power steering gear assembly, if equipped
       
      Steering gear mounting bolts
       
      Power steering gear through the left wheel opening

      Click image to see an enlarged view

      Fig. Common rack and pinion steering gear mounting

       

    10.  

    To install:

    1. Install or connect the following:

      Power steering gear through the left wheel opening
       
      Mounting bolts and torque them to 66 ft. lbs. (90 Nm)
       
      Magnasteer Variable Assist electrical connector to the power steering gear assembly, if equipped
       
      Power steering lines with new O-rings to the steering gear. Torque the fasteners to 20 ft. lbs. (27 Nm).
       
      Power steering return hose
       

    2.  
    3. Raise the rear frame to its original position.
    4.  
    5. Install or connect the following:

      New rear frame bolts and torque them to 133 ft. lbs. (180 Nm) on all models except Impala and Monte Carlo models. On Impala and Monte Carlo models, align the frame to the body by inserting two 19 x 203 mm (0.74 x 8.0 in) pins in the alignment holes on the right side of the frame. Tighten the front bolts to 118 ft. lbs. (160 Nm) and the rear bolts to 122 ft. lbs. (165 Nm)
       
      Tie rod ends to the steering knuckles and torque the nuts to 22 ft. lbs. (30 Nm)
       
      Intermediate steering shaft to the steering gear stub shaft and torque the lower pinch bolt to 35 ft. lbs. (48 Nm)
       
      Front wheels
       
      Negative battery cable
       

    6.  
    7. Fill and bleed the power steering system.
    8.  
    9. Start the vehicle and check for leaks, repair if necessary.
    10.  
    11. Check the front end alignment and adjust as needed.
    12.  



    Click image to see an enlarged view

    Fig. Common rack and pinion steering gear mounting

    1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
    2.  
    3. Remove or disconnect the following:
      CAUTION
      Failure to disconnect the intermediate shaft from the rack and pinion stub shaft may result in damage to the steering gear. This damage may cause a loss of steering control and may cause personal injury.


      NOTE
      Set the steering shaft so that the block tooth on the upper steering shaft is at the 12 o'clock position. The wheels should be straight ahead. Set the ignition key lock to the LOCK position. Failure to follow these procedures could result in damage to the SIR coil assembly.



      Negative battery cable
       
      Front wheels
       

    4.  
    5. Remove or disconnect the following:

      Intermediate steering shaft lower pinch bolt from the steering gear stub shaft
       
      Intermediate steering shaft
       
      Both tie rod ends from the steering knuckles
       

    6.  
    7. Support the frame at the center rear.
      NOTE
      DO NOT lower the frame too far. Engine components near the firewall may be damaged.

    8.  
    9. Remove or disconnect the following:

      Frame bolts from the rear of the frame. Lower the frame slightly
       
      Power steering pressure line from the steering gear
       
      Power steering return hose
       
      Magnasteer Variable Assist electrical connector from the power steering gear assembly, if equipped
       
      Steering gear mounting bolts
       
      Power steering gear through the left wheel opening
       

    10.  

    To install:

    1. Install or connect the following:

      Power steering gear through the left wheel opening
       
      Mounting bolts and torque them to 59 ft. lbs. (80 Nm)
       
      Magnasteer Variable Assist electrical connector to the power steering gear assembly, if equipped
       
      Power steering lines with new O-rings to the steering gear. Torque the fasteners to 20 ft. lbs. (27 Nm).
       
      Power steering return hose
       

    2.  
    3. Raise the rear frame to its original position.
    4.  
    5. Install or connect the following:

      New rear frame bolts and torque them to 133 ft. lbs. (180 Nm)
       
      Tie rod ends to the steering knuckles and torque the nuts to 22 ft. lbs. (30 Nm)
       
      Intermediate steering shaft to the steering gear stub shaft and torque the lower pinch bolt to 35 ft. lbs. (48 Nm)
       
      Front wheels
       
      Negative battery cable
       

    6.  
    7. Fill and bleed the power steering system.
    8.  
    9. Start the vehicle and check for leaks, repair if necessary.
    10.  
    11. Check the front end alignment and adjust as needed.
    12.  

    1. Before servicing the vehicle, refer to the Precautions Section.
    2.  
    3. Remove or disconnect the following:
      CAUTION
      Failure to disconnect the intermediate shaft from the rack and pinion stub shaft may result in damage to the steering gear. This damage may cause a loss of steering control and may cause personal injury.


      NOTE
      Set the steering shaft so that the block tooth on the upper steering shaft is at the 12 o'clock position. The wheels should be straight ahead. Set the ignition key lock to the LOCK position. Failure to follow these procedures could result in damage to the SIR coil assembly.



      Negative battery cable
       
      Front wheels
       

    4.  
    5. Remove or disconnect the following:

      Intermediate steering shaft lower pinch bolt from the steering gear stub shaft
       
      Intermediate steering shaft
       
      Both tie rod ends from the steering knuckles
       

    6.  
    7. Support the frame at the center rear.
      NOTE
      DO NOT lower the frame too far. Engine components near the firewall may be damaged.

    8.  
    9. Remove or disconnect the following:

      Frame bolts from the rear of the frame. Lower the frame slightly
       
      Power steering pressure line from the steering gear
       
      Power steering return hose
       
      Magnasteer Variable Assist electrical connector from the power steering gear assembly, if equipped
       
      Steering gear mounting bolts
       
      Power steering gear through the left wheel opening

      Click image to see an enlarged view

      Fig. Common rack and pinion steering gear mounting

       

    10.  

    To install:

    1. Install or connect the following:

      Power steering gear through the left wheel opening
       
      Mounting bolts and torque them to 66 ft. lbs. (90 Nm)
       
      Magnasteer Variable Assist electrical connector to the power steering gear assembly, if equipped
       
      Power steering lines with new O-rings to the steering gear. Torque the fasteners to 20 ft. lbs. (27 Nm).
       
      Power steering return hose
       

    2.  
    3. Raise the rear frame to its original position.
    4.  
    5. Install or connect the following:

      New rear frame bolts and torque them to 133 ft. lbs. (180 Nm) on all models except Impala and Monte Carlo models. On Impala and Monte Carlo models, align the frame to the body by inserting two 19 x 203 mm (0.74 x 8.0 in) pins in the alignment holes on the right side of the frame. Tighten the front bolts to 118 ft. lbs. (160 Nm) and the rear bolts to 122 ft. lbs. (165 Nm)
       
      Tie rod ends to the steering knuckles and torque the nuts to 22 ft. lbs. (30 Nm)
       
      Intermediate steering shaft to the steering gear stub shaft and torque the lower pinch bolt to 35 ft. lbs. (48 Nm)
       
      Front wheels
       
      Negative battery cable
       

    6.  
    7. Fill and bleed the power steering system.
    8.  
    9. Start the vehicle and check for leaks, repair if necessary.
    10.  
    11. Check the front end alignment and adjust as needed.
    12.  

     
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