Toyota Pick-ups/Land Cruiser/4Runner 1970-1988

Torsion Bars

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REMOVAL & INSTALLATION



1979-88 Pick-Up-2WD

See Figures 1 through 18


CAUTION
Great care must be taken to make sure springs are not mixed after removal, it is strongly suggested that before removal, each spring be marked with paint, showing the front and rear of spring and from which side of the truck it was taken. If springs are installed backward or on the wrong sides of the truck, they could fracture. If replacing springs, it is not necessary to mark them.

  1. Raise the truck and support the frame on stands.
  2.  
  3. Slide the boot from the rear of torsion bar spring housing and onto spring.
  4.  
  5. Follow the same procedure on the front of the spring.
  6.  

Be sure to make a mark showing front of spring from back of spring.

  1. On the rear torsion bar spring holder, there is a long bolt that passes through the arm of the holder and up through the frame crossmember. REMOVE THE LOCKING NUT ONLY, FROM THE BOLT.
  2.  
  3. Using a small ruler, measure the length from the bottom of the retaining nut to the threaded tip of the bolt and record this measurement.
  4.  

Be sure to complete Step 5 accurately.

  1. Position a floor jack under the rear torsion bar spring holder arm and jack up the arm to remove the spring pressure from the long bolt. Loosen the adjusting nut until there is no tension on the torsion bar.
  2.  
  3. Slowly lower the jack.
  4.  
  5. Remove the long bolt and its spacer and remove rear holder. You should be able to pull the torsion bar out of the front and rear holders.
  6.  
  7. Inspect all parts for wear, damage or cracks. Check the boot for rips and wear. Inspect the splined ends of the torsion bar spring and the splined holes in the rear holder and the front torque arm for damage. Replace as necessary. On the rear end of the torsion bar springs, there are markings to show which is right and which is the left bar. Do not confuse them!
  8.  

To install:
  1. Coat the splined ends of the torsion bar with multipurpose grease.
  2.  
  3. If fitting old torsion bars:
    1. Align the toothless portion and install the anchor arm to the torsion bar spring.
    2.  
    3. Slide the front of the bar into the opening on the torque arm, making sure you line up the marks you made earlier on the torsion bar spring and the torque arm.
    4.  
    5. Repeat the above step with the rear spring holder and replace the long bolt and its spacers.
    6.  
    7. Place a pipe that will fit in the notch on the rear holder arm an a jack and jack up the arm.
    8.  
    9. Tighten the adjusting nut so that it is the same length it was before removal.
    10.  

  4.  

Do not replace the locknut yet.

  1. When installing a new torsion bar spring:
    1. Slide the front of the torsion bar into the opening on the torque arm.
    2.  
    3. Fit the rear holder in place and install the rear of the torsion bar into it so that when the long bolt and spacers are installed, the distance from the top of the upper spacer to the tip of the threader end of the bolt is 18-25mm.
    4.  

  2.  

Make sure the bolt and bottom spacer are snugly in the holder arm while measuring.

    1. When the correct measurement is achieved, fit a pipe or round bar in the notch or rear holder arm. Jack up arm on pipe.
    2.  
    3. Replace the adjusting nut and tighten until the distance from the bottom of the nut to the top of the threaded end of the bolt is 71-89mm.
    4.  


Do not install the locknut yet.

  1. Apply multipurpose grease to the boot lips and refit the boots over splines.
  2.  
  3. Replace the wheel and lower the truck.
  4.  
  5. With the wheels on the ground, measure the distance from the ground to the center of the lower arm shaft (See Chart). Adjust vehicle height with the adjusting nut on the rear spring holder.
  6.  

If, after achieving the correct vehicle height, the distance from the bottom of the adjusting nut to the top of the threaded end of the long bolt is more than 97mm, change the position of the rear spring holder arm spline and reassemble.

  1. Replace the locknut on the long bolt. Tighten it to 61 ft. lbs. (83 Nm).
  2.  

Make sure the adjusting nut does not move when tightening the locknut.



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Fig. Fig. 1: Remove the locking nut and measure this bolt-1979-88 2WD Pick-Up



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Fig. Fig. 2: The torsion bar spring are marked-1979-88 2WD Pick-Up



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Fig. Fig. 3: Vehicle height measurement and adjustment-1979-88 2WD Pick-Up



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Fig. Fig. 4: Exploded view of the torsion bar front suspension-1979-88 2WD Pick-Up and 1986-88 4WD Pick-Up and 4Runner



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Fig. Fig. 5: View of the torsion bar assembly--marked for correct installation



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Fig. Fig. 6: View of the torsion bar boot



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Fig. Fig. 7: Removing the rear torsion bar boot



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Fig. Fig. 8: Removing the front torsion bar boot



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Fig. Fig. 9: Measuring the torsion bar bolt--note bolt removed from holder for clear view



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Fig. Fig. 10: Removing the torsion bar bolt and nut



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Fig. Fig. 11: View of the torsion bar bolt assembly



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Fig. Fig. 12: Removing the torsion bar bolt



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Fig. Fig. 13: Removing the torsion bar holder bolt



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Fig. Fig. 14: Removing the torsion bar from the holder



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Fig. Fig. 15: View of the torsion bar splines



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Fig. Fig. 16: View of the torsion bar marked R--right side installation



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Fig. Fig. 17: Installing the torsion bar into the holder



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Fig. Fig. 18: View of the torsion bar splines and cutout on the holder

1986-88 Pick-Up and 4Runner-4WD

See Figures 19, 20, 21, 22 and 23


CAUTION
Great care must be taken to make sure springs are not mixed after removal, it is strongly suggested that before removal, each spring be marked with paint, showing the front and rear of spring and from which side of the truck it was taken. If springs are installed backward or on the wrong sides of the truck, they could fracture. If replacing springs, it is not necessary to mark them.

  1. Raise the truck and support the frame on stands.
  2.  
  3. Slide the boot from the rear of torsion bar spring housing and onto spring.
  4.  
  5. Follow the same procedure on the front of the spring.
  6.  
  7. Paint matchmarks on the torsion bar spring, anchor arm and torque arm.
  8.  
  9. On the rear torsion bar spring holder, there is a long bolt that passes through the arm of the holder and up through the frame crossmember, using a small ruler, measure the length from the bottom of the retaining nut to the threaded tip of the bolt and record this measurement.
  10.  

Be sure to complete Step 5 accurately.

  1. Loosen the adjusting nut and remove the anchor arm and torsion bar spring.
  2.  
  3. Inspect all parts for wear, damage or cracks. Check the boot for rips and wear. Inspect the splined ends of the torsion bar spring and the splined holes in the rear holder and the front torque arm for damage. Replace as necessary. On the rear end of the torsion bar springs, there are markings to show which is right and which is the left bar. Do not confuse them!
  4.  

To install the existing spring:
  1. Coat the splined ends of the torsion bar with multipurpose grease.
  2.  
  3. Align the matchmarks and install the torsion bar spring to the torque arm.
  4.  
  5. Align the matchmarks and install the anchor arm to the torsion bar spring.
  6.  
  7. Tighten the adjusting nut so that the bolt protrusion measured previously is equal to that of the new adjustment.
  8.  

To install a new torsion bar spring:
  1. Install the 2 bolts to the torsion bar spring.
  2.  
  3. Lightly coat the spring end splines with grease and then install the anchor arm to the small end of the spring temporarily. Paint matchmarks on the spring and arm.
  4.  

There is one spline on the spring that is larger than the others. When connecting the spring to the arm, turn the arm slowly until you can feel the larger spline match up with the slot in the arm.

  1. Remove the anchor arm from the spring and install the spring into the torque arm.
  2.  

There is on spline on the spring that is larger than the others. When connecting the spring to the arm, turn the arm slowly until you can feel the larger spline match up with the slot in the arm.

  1. Align the matchmarks and install the anchor arm to the spring. Tighten the adjusting nut so that the exposed thread on the bolt is no greater than 87mm.
  2.  

All models:
  1. Install the locknut and wheels, lower the truck and bounce it several times to set the suspension.
  2.  
  3. Measure the ground clearance and adjust with the adjusting nut. Tighten the locknut to 61 ft. lbs. (83 Nm).
  4.  



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Fig. Fig. 19: Always paint matchmarks on the components prior to removal-1986-88 4WD Pick-Up and 4Runner



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Fig. Fig. 20: Measure the height of this bolt for installation-1986-88 4WD Pick-Up and 4Runner



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Fig. Fig. 21: Vehicle height chart



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Fig. Fig. 22: Vehicle height chart, cont.



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Fig. Fig. 23: Vehicle height chart, cont.

 
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