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C3 Clutch Installation

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NOTE: During reassembly, use oil-soluble grease with a low melting point (petrolatum or equivalent) to temporarily retain parts, butt seal rings, scarf-cut seal rings and hook-type seal rings.
NOTE: DO NOT reuse old clutch piston assembly.
  1. Position main housing so front is facing upward. Apply petrolatum to inside and outside diameters of NEW C3 clutch piston assembly. Align clutch piston assembly with seal downward and install assembly by gently tapping until piston is fully and evenly seated. See Fig 1.
  2. The spring assemblies can be reused. If required, squeeze the spring assembly tabs with pliers to ensure spring assemblies are retained to spring plate. Piston return spring assemblies should snap into place. Install 3 piston return springs assemblies onto spring plate.
  3. Align spring plate and piston return spring assemblies so spring assemblies face upward. Install spring plate into main housing. Starting with a C3 clutch friction plate, alternately install 4 friction plates and 3 reaction plates into the main housing. See Figure and Fig 1 .
  4. Position C3 clutch backplate assembly with gear thrust plates downward. Install backplate assembly into main housing. See Fig 2.
    CAUTION: DO NOT install special tools onto gear thrust plate rivets of C3 clutch backplate assembly. Tools may damage the rivets.
  5. Install Bar and Stud Assembly (J-24204-2) or equivalent, and C3/C4 Piston Spring Compressor (J-44530) or equivalent, into main housing. Ensure spring compressor does not touch backplate rivets. See Figure.
  6. Compress C3 piston return spring assemblies until retaining ring groove is visible and install retaining ring. Ensure ring is fully seated in groove before removing special tool set.
Fig 1: Exploded View Of Converter Housing/Front Support Module, Rotating Clutch Housing & C3 Clutch Components
G00117102Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Orientation Of C3 Clutch Backplate Assembly For Installation
G00117098Courtesy of GENERAL MOTORS CORP.
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