FERRARI GTC4 LUSSO Gearbox 864807

the part number 864807 refers to the Complete 7-speed Dual-Clutch Transmission (DCT) Assembly for the Ferrari GTC4Lusso.

This specific part number is often associated with the later production iterations or the remanufactured exchange units provided through the Ferrari Genuine program. It manages the power for the rear wheels while working in perfect sync with the front PTU (Power Take-Off Unit) to provide the GTC4Lusso’s unique 4WD capabilities.

1. Technical Identification

• Part Number: 864807 (Note: This may supersede older numbers like 70006117 or 451116420).

• Type: 7-Speed Dual-Clutch (DCT) Transaxle.

• Compatibility: * Primarily for the GTC4Lusso (V12).

  • Can be found in certain GTC4Lusso T (V8 Turbo) configurations, though the internal gear ratios and software maps differ.

• Integrated E-Diff: Includes the electronic differential system and the high-pressure hydraulic block that manages gear shifts and torque distribution.

2. 2026 Market Pricing (Estimated USD)

Replacing the main gearbox in a GTC4Lusso is one of the single most expensive maintenance events for the car.

3. Common 2026 Failure Points

If you are sourcing part 864807, your car likely displayed the “Gearbox Failure – Manettino Limited” message. Common internal causes include:

• Speed Sensor / Wiring Harness Failure: Heat degradation of the internal electronics causing “ghost” errors or loss of even/odd gear sets.

• Hydraulic Pressure Loss: Failure of the internal solenoids or seals, preventing the clutches from engaging properly.

• Oil Contamination: Moisture or metallic debris affecting the sensitive hydraulic control block.

4. Installation & Programming

• DEIS Calibration: You cannot simply bolt this in and drive. The car requires a “Self-Learning” and “PIS” (Point of Initial Slippage) procedure via the Ferrari DEIS tool to synchronize the new clutches with the engine’s ECU.

• Cooling System: When replacing the 864807 gearbox, it is mandatory in 2026 to flush the transmission oil coolers and lines to ensure no debris from the old unit contaminates the new one.

• Labor: A full gearbox swap on a GTC4Lusso is a 25 to 35-hour job because the entire rear subframe, exhaust, and suspension must be lowered.