Forward Clutch: Reassembly
WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 2005 Lexus SC 430, 2005 Lexus IS 300, 2005 Lexus GS 430, 2005 Lexus GS 300, and 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- Coat "O" rings with ATF. To complete reassembly, reverse disassembly procedure. Ensure piston return spring snap ring is fully seated and ends do not align with claw area on spring retainer of piston return spring.
- Install cushion plate with rounded end toward inside of clutch drum. Install plates and discs, starting with a plate. Install appropriate number of plates and discs. See Fig 1.
- Install flange with rounded edge toward disc. Install snap ring. Ensure end gap of snap ring is not aligned with forward clutch drum cut-out portion. Place clutch drum on overdrive support. Measure piston stroke while applying 27-30 psi (1.9-2.1 kg/cm2 ) to piston supply port. See Fig 2. See FORWARD CLUTCH PISTON STROKE SPECIFICATIONS table.
- If clearance is not within specifications, install different thickness flange. Flanges are available in thicknesses of .118" (3.0 mm) to .157" (4.0 mm) in .008" (.20 mm) increments. Install thrust bearing and race. Align clutch disc tabs.
FORWARD CLUTCH PISTON STROKE SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| V8 Models | .028-.039 (.70-1.00) |
| 6-Cyl. Models | .024-.035 (.61-.90) |