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HOMESERVICE MANUALSGMC1984SUBURBAN C2500, 6.2 J, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - THM 400COMPONENT DISASSEMBLY & REASSEMBLYFORWARD CLUTCHREASSEMBLY
1984 GMC Suburban C2500, 6.2 J, 400/M40

Forward Clutch: Reassembly

1984 GMC Suburban C2500, 6.2 J, 400/M40SECTION Reassembly
  1. If turbine shaft was removed, place forward clutch housing in press with flat side up. Align shorter splined end of turbine shaft with splines in forward clutch housing. Carefully press shaft into housing until shaft bottoms out.
    NOTE: Start shaft into housing, then back off press so shaft can straighten itself. Repeat until shaft is going in straight.
  2. Invert forward clutch housing on press with turbine shaft pointing down. Oil and install inner and outer seals on clutch piston with seal lips facing away from spring pockets. Oil and install center seal in clutch housing with seal lips facing upward.
  3. Place Inner Seal Protector (J-21362) over clutch hub. Place clutch piston into Installer (J-21409). Install assembly into housing, rotating piston clockwise slightly until seated. Install 16 clutch release springs into piston pockets. See Figure.
  4. Place spring retainer over springs and compress springs with Compressor and Adapter (J-4670-01 and J-21664). Use care to avoid catching retainer in snap ring groove. Install snap ring. Remove tools and ensure all release springs are straight.
  5. Install forward clutch hub thrust washers. Ensure bronze washer is installed on side of hub facing forward clutch housing. Place forward clutch hub in clutch housing.
  6. Lubricate clutch plates with transmission fluid. Install clutch plates, starting with waved steel plate, then alternating composition and flat steel plates until all clutch plates are installed. See Fig 2.
  7. Install direct clutch hub and retaining snap ring. Place forward clutch housing on oil pump delivery sleeve. Check operation of forward clutch by applying air through forward clutch passage. See Fig 1.
Fig 1: Checking Forward Clutch Operation
G96J15981Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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