BMW M3 M4 G80 G81 G82 G83 X-DRIVE GA8HP76X 3.0 GETRIEBE GEARBOX

the GA8HP76X is the definitive 8-speed M Steptronic transmission for the current generation of BMW M power. Specifically designed for the S58 3.0L Twin-Turbo engine, this “X” variant is the reinforced version tailored for the M xDrive (all-wheel drive) systems found in the G80 (Sedan), G81 (Touring), G82 (Coupe), and G83 (Convertible).

1. Technical Identification

• Model: ZF 8HP76 (BMW designation: GA8HP76X).

• Application: M3/M4 Competition models with xDrive.

• Torque Capacity: Rated to handle the factory $650\text{ Nm}$ ($479\text{ lb-ft}$) with significant headroom for tuning (often pushed to $850\text{ Nm}+$ by aftermarket tuners).

• Key Feature: The “X” signifies the integrated transfer case output for the front driveshaft, distinct from the RWD-only GA8HP76.

2. 2026 Market Pricing (Estimated USD)

Replacing an M-Division transmission is a major expense. By 2026, there is a healthy supply of “low-mileage” units from salvage yards, but new units remain expensive.

3. Compatibility & Retrofitting

• Interchangeability: The GA8HP76X from a G80 M3 xDrive is directly compatible with a G82 M4 xDrive. However, it is not a direct swap for the RWD models without changing the output shaft and software.

• The “CS” & “CSL” Factor: While the hardware is identical, the M3 CS and M4 CSL use specific TCU (Transmission Control Unit) software maps for faster shift times and higher clamping pressures. Many owners in 2026 “flash” the CS software onto standard Competition gearboxes.

4. 2026 Service & Maintenance Advice

• The “Lifetime Fill” Myth: BMW claims the fluid is lifetime, but ZF (the manufacturer) recommends a service every 50,000 to 60,000 miles for high-performance use.

• Service Kit: A 2026 service kit (ZF Lifeguard 8 or 9 fluid + plastic pan/filter) costs roughly $450 – $600.

• Mechatronics Issues: By 2026, early G80s (2021-2022) are seeing some solenoid wear in cars that have been heavily launched. If you experience “jerky” downshifts from 3rd to 2nd, a solenoid service or a TCU adaptation reset via ISTA is the first step before replacing the whole unit.

5. Programming (Critical)

You cannot simply “plug and play” a GA8HP76X.

1. EWS / Immobilizer: The transmission is digitally locked to the car’s VIN. You will need a shop with BMW ISTA or Autologic to perform the “Teach-in” process.

2. ISN Matching: If buying used, the ISN (Individual Serial Number) must be cleared or “virginized” before it will allow the car to start.