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Forward Clutch: Reassembly

  1. Using Clutch Piston Installers (J-21362 and J-38732), install piston into forward clutch housing. Reassemble forward clutch. See Fig 1. Install correct number of clutch plates. See FORWARD CLUTCH PLATE APPLICATION  table.
  2. Apply 80 psi (550 kPa) of air to turbine shaft air port. See Fig 2. Ensure piston seals do not leak. Check forward clutch piston movement. Forward clutch piston should move .121-.186" (3.07-4.72 mm) on all except model ZFP. On model ZFP, forward clutch piston should move .087-.150" (2.21-3.81 mm).
FORWARD CLUTCH PLATE APPLICATION

Application Quantity
Model ZFP
Flat Steel Plate 4
Composition Plate 5
Waved Steel Plate 1
Except Model ZFP
Flat Steel Plate 5
Composition Plate 5
Dished Steel Plate 1
Fig 1: Exploded View Of Forward Clutch Assembly
G96E04463Courtesy of GENERAL MOTORS CORP.
Fig 2: Checking Forward Clutch Piston Travel
G92A13839Courtesy of GENERAL MOTORS CORP.
Fig 3: Compressing Forward Clutch Spring Retainer
G92J13838Courtesy of GENERAL MOTORS CORP.