Repair Pontiac Mid-size 1974-1983 Repair Guide

Fluid Pan

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REMOVAL & INSTALLATION/FILTER SERVICE





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Fig. Fig. 1 To remove the A/T fluid pan, remove the front and side bolts, then loosen the rear bolts 4 turns each



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Fig. Fig. 2 Carefully pry the pan loose, being careful not to distort the flange



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Fig. Fig. 3 Allow the automatic transmission fluid to drain completely into a suitable container



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Fig. Fig. 4 After all of the fluid has drained, remove the automatic transmission pan



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Fig. Fig. 5 Unfasten the filter-to-body retaining screws ...



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Fig. Fig. 6 ... then remove the transmission fluid filter

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, preferably in a level attitude.
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  3. With the Turbo Hydra-Matic 350, support the transmission and remove the support crossmember.
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  5. Place a large pan under the transmission pan. Remove all the front and side pan bolts. Loosen the rear bolts about four turns.
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  7. Pry the pan loose and let it drain.
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  9. 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. Remove the strainer to valve body screws, the strainer, and the gasket. Most 350 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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  3. If there is a strainer, clean it in solvent and air dry.
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To install:

  1. Install the new filter or cleaned strainer with a new gasket. Tighten the screws to 12 ft. lbs. On the 400, install a new intake pipe O-ring and a new filter, tightening the retaining bolt to 10 ft. lbs.
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  3. Install the pan with a new gasket. Tighten the bolts evenly to 12 ft. lbs. (8 for Powerglide and Torque Drive).
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  5. Lower the car and add the proper amount of DEXRON® or DEXRON® II automatic transmission fluid through the dipstick tube.
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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. below ADD. Be very careful not to overfill. Recheck the level after the car 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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