Toyota Pick-ups, Land Cruiser, and 4 Runner 1997-00

Torsion Bars

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Torsion bars are used in place of coil springs on some trucks. While employing the same torsion principal as a spring, the torsion bars are installed parallel to the ground instead of vertically as is a coil spring. This allows a much more compact suspension arrangement, lower front end styling and better suspension control since the torsion bar need not move through the greater distances traversed by a compression spring. The torsion bars are under tension as is any installed spring and great care must be taken when removing the bars.

REMOVAL & INSTALLATION




WARNING
Great care must be taken to make sure torsion bars are not mixed after removal, it is strongly suggested that before removal; each be marked with paint, showing the front and rear of spring and from which side of the truck it was taken. If they are installed backward or on the wrong sides of the truck, they could fracture. New units are marked "L" or "R" with an arrow showing direction of flex.

Land Cruiser


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Fig. Front torsion bar suspensionLand Cruiser shown



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Fig. Matchmark the position of the torsion bar before removing it



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Fig. Measure the height of "A". Use this measurement as a reference upon installation



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Fig. Measure the height of "B" to aid you when re-installing the anchor arm



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Fig. Proper direction of rotation of the torsion bar

  1. Raise and properly support the vehicle.
  2.  
  3. Remove the front wheel.
  4.  
  5. Detach the engine undercover.
  6.  
  7. Matchmark the torsion bar spring, anchor arm, and torque arm.
  8.  
  9. Measure the dimension "A" between the anchor arm adjusting bolt and the end of the frame. This measurement can be used as a reference point when installing the anchor arm.
  10.  
  11. Loosen the anchor arm until the spring is free of all tension.
  12.  
  13. Measure the anchor arm bolt "B." Again, this measurement can be used as a reference point for installation.
  14.  
  15. Remove the adjusting bolt from the anchor arm.
  16.  
  17. Remove the anchor arm swivel and anchor arm adjusting seat.
  18.  
  19. Remove the torsion bar spring with the anchor arm.
  20.  
  21. Detach the anchor arm from the torsion bar spring.
  22.  
  23. Remove the two nuts and bolts, and then remove the torque arm.
  24.  

To install:

  1. Install the bolt, torque arm and the two nuts. Torque the bolts to 166 ft. lbs. (225 Nm).
  2.  

The torsion bars are marked left and right on the ends. There are also arrows that show the proper direction of travel.

  1. Install the anchor arm to a new torsion bar spring.
  2.  
  3. Assemble the torsion bar spring and the anchor arm.
  4.  
  5. Install the anchor arm to the torque arm.
  6.  
  7. Assemble the anchor arm adjusting seat, anchor arm swivel, and anchor arm adjusting bolt.
  8.  
  9. Check the length of the anchor arm adjusting bolt end is close to your measurement from the removal process.
  10.  
  11. Tighten the anchor arm adjusting bolt to the following specifications:

    Left: 0.3150.984 in. (825mm)
     
    Right: 0.0790.709 in. (218mm)
     

  12.  
  13. If you are installing a used torsion bar spring, perform the following:

    Install the torsion bar spring and anchor.
     
    Align the matchmarks, you made earlier in the removal procedure, on the torsion bar spring and anchor arm.
     
    Install the torsion bar spring into the anchor arm.
     
    Align the matchmarks you made on the torsion bar spring and torque arm. Once they line up, install them.
     

  14.  
  15. Tighten the anchor arm adjusting bolt so that the dimension "A" is the same as the dimension measured before you removed the bar.
  16.  
  17. Install the engine undercover.
  18.  
  19. Install the front wheel and torque the lug nuts to 97 ft. lbs. (131 Nm).
  20.  
  21. Check the vehicle ride height.
  22.  

T100


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Fig. Measure the length of the threaded bolt end and use the measurement as a reference when installing the torsion bar



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Fig. Loosening the adjuster nut and anchor arm



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Fig. Torque arm mounting bolts

  1. Raise and properly support the vehicle.
  2.  
  3. Remove the front wheel.
  4.  
  5. Measure the length of the threaded bolt end. Use this measurement as a reference during installation.
  6.  
  7. Loosen the adjusting nut and remove the anchor arm.
  8.  
  9. Remove the torsion bar spring only after all tension has been removed from it.
  10.  
  11. Remove the torque arm.
  12.  

To install:

  1. Installation is the reverse of removal. Please note the following torque specifications:

    Torque arm bolts: 64 ft. lbs. (87 Nm).
     
    Lug nuts: 76 ft. lbs. (103 Nm).
     

  2.  

 
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