BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800
BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800 - Image 2
BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800 - Image 3
BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800 - Image 4
BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800 - Image 5
BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800 - Image 6
Category:

BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800

(33 Customer Reviews)

In Stock

$3,000.00

BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800

Part Number: 23007858800 (Replaces 23007849615)

Model Code: GS6-45BZ – THA9 (Option S2MA)

The GS6-45BZ is the reinforced 6-speed manual gearbox engineered by ZF for the high-torque $S55$ biturbo engine. Found exclusively in the M3 (F80) and M4 (F82/F83), this transmission is a specialized evolution of the standard F30 units, featuri

Category:

BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800

Part Number: 23007858800 (Replaces 23007849615)

Model Code: GS6-45BZ – THA9 (Option S2MA)

The GS6-45BZ is the reinforced 6-speed manual gearbox engineered by ZF for the high-torque $S55$ biturbo engine. Found exclusively in the M3 (F80) and M4 (F82/F83), this transmission is a specialized evolution of the standard F30 units, featuring upgraded internals to handle the $550\text{ Nm}$ of torque and the $7600\text{ RPM}$ redline of the M-power powerplant.

Technical Specifications

  • Compatibility: * BMW M3 (F80): 2014–2018

    • BMW M4 (F82/F83): 2014–2020

  • Torque Rating: Officially rated at $600\text{ Nm}$, though physically identical to units tested for higher loads in performance applications.

  • Weight: ~45 kg (99 lbs), contributing to the Manual M4 being significantly lighter than its DCT counterpart.

  • Clutch Compatibility: Designed for the M-specific Twin-Plate Clutch and Dual-Mass Flywheel.

Key Performance Engineering

  • Carbon-Fiber Synchronizers: Unlike standard gearboxes, the M-spec GS6-45BZ utilizes carbon-fiber friction linings on its synchronizer rings. This allows for faster, more heat-resistant gear synchronization during aggressive high-RPM shifting.

  • Dry Sump Lubrication System: This variant features an internal oil spray system that actively lubricates the gear meshes. This reduces “churning losses” and ensures consistent lubrication under high lateral $G$-forces that would otherwise push oil away from critical components.

  • Auto Rev-Match (Speed Sensor): The gearbox includes an integrated gear-position sensor that communicates with the DME (Engine ECU). This enables the automated heel-toe blip during downshifts when the vehicle is in Efficient or Sport modes.

  • Optimized Ratios: The gear spreads are engineered to keep the $S55$ biturbochargers in their peak boost window between shifts.

Professional Installation & Cataloging Notes

When preparing this transmission for inventory or a swap, observe the following technical standards:

  1. DME Calibration: If retrofitting this unit into a car that was previously a DCT, the DME must be flashed with the manual software profile to enable the rev-match functionality and cruise control logic.

  2. Fluid Specification: This unit requires BMW MTF-LT-5. It is critical not to use older LT-2 or LT-3 fluids, as the chemical additives are specifically matched to the carbon-fiber synchronizer linings.

  3. Driveshaft Compatibility: The manual transmission is physically shorter than the DCT. A manual-specific driveshaft and shifter linkage assembly must be used for a successful installation.

  4. Condition Check: Inspect the Input Shaft for any play and ensure the Gear Position Sensor (located on top of the housing) is undamaged, as this sensor is vital for the car’s electronics to understand which gear is selected.

Component Note: A complete “Swap Set” should include the transmission, the M-specific shifter carrier, the dual-mass flywheel, and the twin-plate clutch assembly.

Average Rating

4.39
33 Review
5 star 40%

4 star 61%

3 star 0%

2 star 0%

1 star 0%

33 reviews for BMW M3 F80 M4 F82 Transmission Manual Gearbox GS6-45BZ 23007858800

  1. Noah Mitchell (verified owner) –

    Used for UI preview only.

  2. Ella Johnson (verified owner) –

    Used for interface design.

  3. Hannah Young (verified owner) –

    No issues shown in system view.

  4. Layla Green (verified owner) –

    Reliable stop behavior in design.

  5. Ava Carter (verified owner) –

    Used for UI testing.

  6. Stella Parker (verified owner) –

    Gearbox operation appears smooth.

  7. Charlotte Morgan (verified owner) –

    Stable performance in interface.

  8. Charlotte Morgan (verified owner) –

    No errors shown in interface.

  9. Scarlett Adams (verified owner) –

    Not real review.

  10. Ava Bennett (verified owner) –

    Lighting appears bright in preview.

  11. Oliver Mitchell (verified owner) –

    Wheels appear premium and durable.

  12. Victoria Cooper (verified owner) –

    Used for product page.

  13. Sophia Walker (verified owner) –

    Used for product layout.

  14. Ryan Cooper (verified owner) –

    Headlights appear bright and modern.

  15. Thomas Lewis (verified owner) –

    Design placeholder.

  16. Emma Collins (verified owner) –

    UI preview content only.

  17. Grace Adams (verified owner) –

    BMW Brake System

  18. Lucas Brooks (verified owner) –

    Placeholder for UI testing.

  19. Lucy Foster (verified owner) –

    Sample review text.

  20. Ava Mitchell (verified owner) –

    Placeholder content.

  21. Brooklyn Carter (verified owner) –

    Placeholder text.

  22. Penelope Mitchell (verified owner) –

    UI testing content.

  23. Daniel Wright (verified owner) –

    BMW Shock

  24. Aaron Bennett (verified owner) –

    Braking response looks fast and controlled.

  25. Amelia Brooks (verified owner) –

    Stylish and durable-looking wheels.

  26. Harper Evans (verified owner) –

    Very smooth and refined behavior shown.

  27. Mia Reynolds (verified owner) –

    BMW Wheels

  28. Victoria Hall (verified owner) –

    Great presentation for a premium product page.

  29. Lily Martin (verified owner) –

    Perfect alignment and clean design.

  30. Penelope Mitchell (verified owner) –

    Strong and responsive braking feel.

  31. Jack Richardson (verified owner) –

    Good sense of control and safety.

  32. Grace Adams (verified owner) –

    Well-executed UI display.

  33. Isaac Morgan (verified owner) –

    BMW Gearbox

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