Mazda Trucks 1994-1998 Repair Guide

Torsion Bars

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Only the 1998 B Series Pick-up models equipped with 4WD use torsion bars.

REMOVAL & INSTALLATION



See Figures 1 and 2



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the torsion bar rear mounting components

A special tool (Torsion Bar Tool T95T-5310-A) is required for removing the torsion bar. Also, anytime the torsion bar or its adjuster is removed, the vehicle ride height must be checked.

  1. Raise and safely support the front of the vehicle. Place the jackstands so as to support the frame of the vehicle. Do not position the jackstands under the lower control arms and do not use car ramps. The lower control arms must be free to hang unhindered.
  2.  
  3. Remove the torsion bar protector/skid plate from the frame.
  4.  
  5. Remove the torsion bar adjuster bolt from the support nut. Count the number of turns required to remove the bolt and record it for installation.
  6.  
  7. Use Torsion Bar Tool T95T-5310-A, or equivalent, to raise the adjuster lever.
  8.  



Click image to see an enlarged view

Fig. Fig. 2: Use the torsion bar tool to relieve the tension from the bar

  1. Remove the support nut then lower the adjuster lever completely.
  2.  
  3. Slide the torsion bar forward, into the lower control arm, to allow the adjuster lever to be removed.
  4.  
  5. Lower the torsion bar and pull it from the lower control arm.
  6.  

Ensure that you do not mix up the right and left-hand torsion bars. They must be installed to the side they were originally removed. If installing a new torsion bar, ensure to order the bar for the proper side of the vehicle.

To install:
  1. Raise the torsion bar and slide it forward into the lower control arm.
  2.  
  3. Slide the torsion bar rearward and engage it into the adjuster lever.
  4.  
  5. Use Torsion Bar Tool T95T-5310-A, or equivalent, to raise the adjuster lever.
  6.  
  7. Install the support nut and remove the tool.
  8.  
  9. Lubricate the tip of the adjuster bolt and start it into the support nut.
  10.  
  11. Tighten the adjuster the same number of turns you recorded earlier, then rotate two additional turns.
  12.  
  13. Install the torsion bar protector/skid plate. Tighten the bolts securely.
  14.  
  15. Lower the vehicle and check the ride height adjustment.
  16.  

RIDE HEIGHT ADJUSTMENT



See Figures 3 and 4



Click image to see an enlarged view

Fig. Fig. 3: Measure the distance between the center of the lower control arm bushing bolt and the ground



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Fig. Fig. 4: Measure the distance between the lowest point of the steering knuckle (but not the ball joint) and the ground

To perform the ride height check and adjustment requires the use of special slip plates under the front wheels. These plates allow the front suspension to properly settle by bypassing the tires adhesion to the ground.

  1. Raise and support the vehicle.
  2.  
  3. Position frictionless slip plates under the tires then lower the vehicle onto the slip plates.
  4.  
  5. Bounce the vehicles front and rear suspensions several times to normalize the vehicle static ride height.
  6.  
  7. Measure the distance between the center of the lower control arm bushing bolt and the ground. Record the measurement as dimension A.
  8.  
  9. Measure the distance between the lowest point of the steering knuckle (but not the ball joint) and the ground. Record the measurement as dimension B.
  10.  
  11. Subtract dimension B from dimension A for ride height.
  12.  
  13. Ride height should be 4.33-4.56 in. (110-116mm).
  14.  
  15. To increase the ride height, raise the vehicle and tighten the torsion bar adjuster bolt. Recheck the ride height.
  16.  
  17. To decrease the ride height, raise the vehicle and loosen the torsion bar adjuster bolt. Recheck the ride height.
  18.  
  19. Once proper ride height is established, raise and support the vehicle.
  20.  
  21. Remove the slip plates from under the wheels.
  22.  
  23. Lower the vehicle.
  24.  

 
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