Ferrari GTC4 LUSSO Gearbox 45181226 451116420 70006117

the part numbers 70006117, 451116420, and 45181226 refer to the 7-speed Dual-Clutch Transmission (DCT) assembly and its sub-components for the Ferrari GTC4Lusso (both V12 and T models).

This gearbox is a transaxle unit developed by Getrag, and it is a masterpiece of engineering that manages the 680+ HP of the V12 while integrating with the car’s complex E-Diff and 4RM-S (four-wheel drive) system.

1. Technical Identification

• Part 70006117: This is the primary Complete Gearbox Assembly (Exchange/New). It includes the housing, gear sets, and the internal hydraulic control system.

• Part 451116420 / 45181226: These often refer to the Internal Mechanical Sets or Specific Production Revisions of the gearbox housing and gear clusters.

  • Note: Ferrari often updates these numbers when they improve the internal sensor kits or the speed sensor harness, which were common fail points in earlier DCT units.

• The “Twin” Gearbox Concept: Remember that in the GTC4Lusso, this rear-mounted DCT only handles the rear wheels. The front wheels are handled by a separate Power Take-Off (PTU) unit at the front of the engine.

3. Common 2026 Failure Points

If you are looking for these parts, it is likely due to one of the following “standard” DCT issues:

• Speed Sensor Failure: Often referred to as “the $100 sensor inside a $40k gearbox.” It requires splitting the gearbox casing to replace.

• Internal Hydraulic Leaks: Causes pressure loss, leading to the “Gearbox Failure” warning and the loss of even or odd gears.

• Clutch Wear: While the wet clutches are robust, heavy use of Launch Control can eventually require a clutch pack replacement (Part of the 70006117 assembly).

4. Installation & Programming

• DEIS Calibration: Once the gearbox is installed, it must undergo a “Clutch Kiss Point” and “Self-Learning” calibration using the Ferrari DEIS diagnostic system.

• Oil Specs: The GTC4Lusso gearbox uses specialized Shell Spirax S5 DCT1 fluid. In 2026, it is highly recommended to perform a “Full Flush” every 3 years to protect the sensitive internal sensors.

• Weight & Labor: This is a transaxle unit; replacing it requires removing the entire rear subframe and the torque tube. Labor usually ranges from 20 to 30 hours.