GM Lumina/Silhouette/Transport APVs 1990-1999 Repair Guide

Fluid Pan

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Removal & Installation



  1. Raise the vehicle and support it safely.
  2.  
  3. Place a drain pan under the transaxle fluid pan.
  4.  
  5. Remove the trans pan bolts from the front and sides only.
  6.  
  7. Loosen the rear trans pan bolts approximately four turns.
  8.  
  9. Lightly tap on the trans pan with a rubber mallet to allow the fluid to drain.
  10.  
  11. Remove the remaining trans pan bolts, then remove the trans pan and gasket.
  12.  

See Figures 1, 2, 3 and 4

Click image to see an enlarged view

Fig. Fig. 1: Remove the bolts from the trans pan



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Fig. Fig. 2: With the trans pan removed, the filter is visible and accessible



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Fig. Fig. 3: Some trans pan gaskets were designed to be reusable; this is one of them



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Fig. Fig. 4: The magnet in this trans pan catches a lot of debris, but it is not removable. It must be cleaned along with the pan

To install:
  1. Thoroughly clean the pan and magnet. Clean the gasket surfaces with a suitable solvent and allow to dry completely. All traces of gasket material must be removed.
  2.  
  3. Install the trans pan with either a new gasket or the reusable gasket, as applicable, and secure with the pan retaining bolts. Tighten the bolts to 15 ft. lbs. (20 Nm).
  4.  
  5. Lower the vehicle and fill the transaxle to the proper level with DEXRON II® fluid.
  6.  
  7. Check the cold fluid level for the initial fill. Do not overfill.
  8.  
  9. Check the fluid level as outlined in General Information and Maintenance .
  10.  
  11. Check the trans pan for leaks.
  12.  

FILTER SERVICE



  1. Raise the vehicle and support it safely.
  2.  
  3. Place a drain pan under the transaxle fluid pan.
  4.  
  5. Remove the trans pan bolts from the front and sides only.
  6.  
  7. Loosen the rear trans pan bolts approximately four turns.
  8.  
  9. Lightly tap on the trans pan with a rubber mallet to allow the fluid to drain.
  10.  
  11. Remove the remaining trans pan bolts, oil pan and gasket.
  12.  
  13. Remove the trans filter and O-ring using a slight twisting and pulling motion.
  14.  

The trans filter O-ring may be stuck in the case.

See Figure 5

Click image to see an enlarged view

Fig. Fig. 5: Remove the filter with a slight twist and pull

To install:
  1. Coat the O-ring with a small amount of Transjel®, or equivalent.
  2.  
  3. Install the new filter into the case.
  4.  
  5. Thoroughly clean the pan and magnet. Clean the gasket surfaces with a suitable solvent and allow to dry completely. All traces of gasket material must be removed.
  6.  
  7. Install the trans pan with either a new gasket or the reusable gasket, as applicable, and secure with the pan retaining bolts. Tighten the bolts to 15 ft. lbs. (20 Nm).
  8.  
  9. Lower the vehicle and fill the transaxle to the proper level with DEXRON® II.
  10.  
  11. Check the cold fluid level for the initial fill. Do not overfill.
  12.  
  13. Check the fluid level as outlined in General Information and Maintenance .
  14.  
  15. Check the trans pan for leaks.
  16.  

See Figure 6

Click image to see an enlarged view

Fig. Fig. 6: This transaxle seepage (from the cooler lines) is not enough of a leak to repair. All it did was stain the bottom of the trans. No drops of fluid were visible

 
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