MERCEDES GT X290 GT63S AMG Transmission A2132707403 4-MATIC Transmission
Mercedes-AMG GT 63 S (X290) 4-MATIC+ Transmission
Part Number: A2132707403 | Model: 725.096
Command the full power of your 4.0L V8 Biturbo with the Genuine AMG SPEEDSHIFT MCT 9G Transmission. This sophisticated gearbox (Code 725.096) is the factory-correct unit for the Mercedes-AMG GT 63 S 4-Door (X290). Unlike standard automatic transmissions, the MCT (Multi-Clutch Technology) replaces the traditional torque converter with a wet start-off clutch, allowing for lightning-fast 100ms shifts and aggressive “Race Start” launches. MERCEDES GT X290 GT63S AMG Transmission A2132707403 4-MATIC Transmission
This transmission is specifically calibrated for the 4-MATIC+ all-wheel-drive system, enabling fully variable torque distribution from the front to the rear axles.
Technical Specifications
| Feature | Details |
| Part Number | A2132707403 |
| Alternate Numbers | A2132704702, A2132704903 |
| Transmission Model | 725.096 (9G-Tronic AMG Base) |
| Technology | AMG SPEEDSHIFT MCT (Multi-Clutch) |
| Torque Rating | Up to 900 N⋅m (664 lb⋅ft) |
| Drivetrain | 4-MATIC+ All-Wheel Drive |
| Weight | Approx. 64 kg (Excluding Fluids) |
Fitment & Compatibility
This unit is designed exclusively for the high-performance X290 chassis and related V8 AMG platforms.
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Mercedes-AMG GT 63 S 4-Door: X290 / W290 (2018–2026+)
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Mercedes-AMG GT 63 4-Door: X290 (470kW / 639hp Variants)
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Engine Match: M177 / M178 4.0L V8 Biturbo
Why Choose a Genuine AMG Transmission?
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MCT Wet Clutch: Provides the direct connection and immediate response required for track driving and high-speed downshifts that standard converters cannot replicate.
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4-MATIC+ Optimization: Includes the necessary internal output shafts and logic to communicate with the AMG rear-axle limited-slip differential.
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Factory Reliability: Built to withstand the extreme heat and mechanical stress of 639+ HP launches.
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MBUX Integration: 100% compatible with AMG Dynamic Select modes (Slippery, Comfort, Sport, Sport+, Race).
Professional Installation Note
⚠️ Critical: Installation of this transmission requires specialized Mercedes-Benz diagnostic software (XENTRY). The SCN Coding (Software Calibration Number) must be updated to match your vehicle’s VIN to unlock the immobilizer and ensure the gearshift logic aligns with your ECU. It is highly recommended to perform a full transmission oil service using MB 236.17 specification fluid upon installation.
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