Multiple Disc Brake & Front Planetary Gear: 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.
CAUTION:
Clutch discs should be soaked in ATF for 15 minutes prior to installation. Coat all parts with ATF prior to installation. Coat thrust bearings and races with petroleum jelly prior to installation.
- Install NEW "O" rings on 2nd-3rd brake piston. Use care not to damage "O" rings during piston installation. Compress piston return spring and install snap ring. Ensure snap ring is fully seated and ring ends do not align with claw area on spring retainer of piston return spring. Install plates and discs, starting with a plate. Install appropriate number of plates and discs. Install flange into brake drum with carved mark on flange facing upward. Install snap ring in support and ensure end of snap ring is not aligned with cut-out portion of brake drum.
- Measure piston stroke while applying 57-114 psi (4-8 kg/cm2 ) to piston supply port. See Fig 4. See MULTIPLE DISC BRAKE PISTON STROKE SPECIFICATIONS table.
- If clearance is not within specification, install different thickness flange. Flanges are available in thicknesses from .142" (3.60 mm) to .161" (4.10 mm) in .004" (.10 mm) increments. V8 models also have a .165" (4.20 mm) flange available. Install thrust washers. Align clutch disc tabs.
MULTIPLE DISC BRAKE PISTON STROKE SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| V8 Models | .028-.039 (.70-1.00) |
| 6-Cyl. Models | .022-.034 (.56-.86) |
Fig 1: Exploded View Of Multiple Disc Brake Assembly (Includes No. 1 One-Way Clutch, 3rd Brake, 2nd Brake & Front Planetary Gear)