GM Cutlass RWD 1970-1987 Repair Guide

Fluid Pan

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REMOVAL & INSTALLATION



The fluid should be changed with the transmission warm. A 20 minute drive at highway speeds should accomplish this.

  1. Raise and support the vehicle safely with jackstands.
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  3. On some models it may be necessary to remove the crossmember, make sure to support the transmission if this is necessary.
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  5. Place a large drain pan under the transmission fluid pan.
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  7. Remove all the front and side pan bolts, then loosen the rear bolts about four turns.
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  9. Carefully pry or tap the pan loose and let it drain.
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WARNING
Be sure that you do not distort or damage the pan while draining the fluid. If necessary, loosen the rear pan bolts a few more turns for better access.

  1. Once most of the fluid has drained, remove the pan and gasket. Clean the pan thoroughly with solvent and air dry it. Be very careful not to get any lint from rags in the pan.
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It is normal to find a SMALL amount of metal shavings in the pan. An excessive amount of metal shavings indicates transmission damage which must be handled by a professional automatic transmission mechanic.

  1. The transmission filter may now be serviced.
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  3. Install the pan with a new gasket. Tighten the bolts evenly to 10-13 ft. lbs. (13-17.5 Nm)
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  5. Lower the vehicle and add the proper amount of DEXRON®II automatic transmission fluid through the dipstick tube. Add fluid gradually, checking the level often in order to prevent overfilling the transmission. Leave the fluid level down about 1 pint until the fluid is can be warmed and the level rechecked.
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  7. Start the engine in Park and let it idle. Do not race the engine. Shift into each shift lever position, shift back into Park, and check the fluid level on the dipstick. The level should be 1 / 4 in. (6mm) below ADD. Be very careful not to overfill. Recheck the level after the vehicle has been driven long enough to thoroughly warm up the transmission. Add fluid as necessary. The level should then be at Full.
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  9. Drive the car long enough to thoroughly warm up the transmission. Recheck the fluid level and add fluid as necessary.
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FILTER SERVICE



  1. Remove the fluid pan.
  2.  
  3. Remove the strainer-to-valve body screws, the strainer, and the gasket. Most transmissions will have a throw-away filter instead of a strainer. On the 400 transmission, remove the filter retaining bolt, filter, and intake pipe O-ring.
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  5. If there is a strainer, clean it in solvent and air dry.
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  7. Install the new filter or cleaned strainer with a new gasket. Tighten the screws to 12 ft. lbs. (16 Nm). On the 400, install a new intake pipe O-ring and a new filter, tightening the retaining bolt to 120 inch lbs. (14 Nm).
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  9. Install the pan with a new gasket and add the proper amount of DEXRON®II automatic transmission fluid through the dipstick tube.
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