Pontiac Fiero 1984-1988 Repair Guide

Cradle (Sub-Frame)

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Exploded view of the engine and transaxle cradle (sub-frame) assembly


CAUTION
If you are using a twin post hoist, place safety stands at the rear most points as shown in the "Jacking" illustration in . If using a single post hoist, place two safety stands in the front and two in the rear at the points shown in the "Jacking" illustration.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Remove the exhaust pipe bolts at the manifold.
  4.  
  5. Remove the rear wheel assemblies.
  6.  
  7. Remove both rear lateral control arms, fixed adjusting links and trailing arms at the knuckle.
  8.  
  9. Remove the stabilizer brackets at the cradle (GT only).
  10.  
  11. Remove the engine and transaxle mount bolts.
  12.  
  13. Remove the cradle bolts and cradle.
  14.  

To install:

  1. Install the cradle assembly and tighten the retaining bolts finger tight.
  2.  
  3. Install the engine and transaxle mounting bolts and torque to 36 ft. lbs. (48 Nm).
  4.  
  5. Install the parking brake cable at the cradle.
  6.  
  7. Reconnect the stabilizer brackets.
  8.  
  9. Install both trailing arms, fixed adjustable links and lateral control arms at the knuckle.
  10.  
  11. Install the exhaust pipe at the manifold.
  12.  
  13. Install the rear wheel assemblies.
  14.  
  15. Torque the front cradle retaining bolts to 67 ft. lbs. (90 Nm) and the rear bolts to 76 ft. lbs. (103 Nm).
  16.  
  17. Set the toe-in adjustment as outlined in the "Rear Wheel Alignment" procedures in .
  18.  

Torques and Adjustments
    1. Front and rear engine mount: 36 ft. lbs. (48 Nm).
    2.  
    3. Rear lateral control arms at knuckle: 41 ft. lbs. (55 Nm) + 90°.
    4.  
    5. Rear lateral control arms at cradle: 41 ft. lbs. (55 Nm) + 105°.
    6.  
    7. Fixed adjusting link at knuckle: 37 ft. lbs. (50 Nm) + 90°.
    8.  
    9. Fixed adjusting link at cradle: 41 ft. lbs. (55 Nm) + 105°.
    10.  
    11. Trailing arm to knuckle: 44 ft. lbs. (60 Nm) + 90°.
    12.  
    13. Trailing arm to cradle: 37 ft. lbs. (50 Nm) + 80°.
    14.  
    15. Stabilizer bar bracket mounting bolts: 18 ft. lbs. (25 Nm).
    16.  
    17. Exhaust pipe to manifold: 18 ft. lbs. (25 Nm).
    18.  
    19. Wheel lug nuts: 100 ft. lbs. (136 Nm).
    20.  


 
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