8AT TG-81SC Automatic Transmission Valve Body Assembly Without Start-stop Function 9 Electromagnetic Valve Version

Function: Hydraulic control unit for Aisin 8-speed RWD transmissions (torque capacity 500Nm+), managing clutch apply and shift timing.

Key Features:

• Solenoid Configuration: 9x direct-acting PWM solenoids (no ECCC logic)

• Pressure Control: Dual-range regulator valve (30-120 psi base/300 psi clutch apply)

• Material: Aluminum die-cast with laser-bored channels

Failure Modes:

• Solenoid Fatigue: Shift solenoids 3/5 wear first (P0756/P0776)

• Valve Bore Wear: Particularly shift valve 2 (causes 4-5 flare)

• Check Ball Jamming: Debris locks separator plates

Critical Specs:

1. Solenoid resistance: 5.5Ω ±0.5Ω

2. Valve bore clearance: <0.02mm

3. Test pressure: 85 psi @ 20°C

Pro Tip: Post-installation, perform line pressure learn (requires Aisin Tool or OEM scanner)