BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800
BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800 - Image 2
BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800 - Image 3
BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800 - Image 4
Category:

BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800

(33 Customer Reviews)

In Stock

$2,900.00

BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800

Model Code: GS6-45BZ (Option S2MA)

The GS6-45BZ is the heavy-duty 6-speed manual gearbox engineered by ZF for the high-torque $S55$ biturbo engine. Found in the M2 Competition (F87), M3 (F80), and M4 (F82), this transmission is a favorite among enthusiasts for its mech

Category:

BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800

Model Code: GS6-45BZ (Option S2MA)

The GS6-45BZ is the heavy-duty 6-speed manual gearbox engineered by ZF for the high-torque $S55$ biturbo engine. Found in the M2 Competition (F87), M3 (F80), and M4 (F82), this transmission is a favorite among enthusiasts for its mechanical engagement and “rev-matching” technology. Despite the prevalence of the DCT, this manual unit is increasingly rare and highly valued for analog driving builds.

Technical Specifications

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

    • BMW M4 (F82) $2014$–$2020$

    • BMW M2 Competition (F87) $2019$–$2021$

  • Torque Rating: Officially rated to handle up to $600\text{ Nm}$ ($443\text{ lb-ft}$), though it is known in the tuning community for its robustness under higher loads.

  • Weight: Approximately $45\text{ kg}$ ($99\text{ lbs}$), offering a significant weight saving of roughly $25\text{ kg}$ over the M-DCT alternative.

  • Key Feature: Integrated Auto-Rev Match (can be disabled by turning DSC off or via coding).

Performance Engineering

  • Carbon-Fiber Friction Linings: To handle the rapid synchronization required by the high-revving $S55$ engine ($7600\text{ RPM}$ redline), the synchronizer rings utilize carbon-fiber linings. This provides superior thermal stability and smoother shifts under track conditions.

  • Dry Sump Lubrication: This “BZ” variant utilizes a specialized oil spray system to reduce drag and ensure all gears are lubricated even during high-$G$ cornering, preventing oil starvation.

  • Dual-Plate Clutch Compatibility: The input shaft and bellhousing are designed to accommodate the heavy-duty dual-plate clutch system required to transfer biturbo torque without slipping.

Technical Installation & Cataloging Notes

When managing this transmission for inventory or a conversion project, please note the following:

  1. DME Integration: If retrofitting this manual into a car that was originally a DCT, the DME (Engine Control Unit) must be flashed with the manual software to ensure the rev-matching and cruise control functions work correctly.

  2. Fluid Requirements: This unit requires BMW MTF-LT-5 (Manual Transmission Fluid, Lifetime 5). Using incorrect fluid can damage the carbon-fiber synchronizers and lead to notched shifting or gear grind.

  3. Physical Dimensions: While the GS6-45BZ is used in several BMW models, the 7858800 variant features the specific bellhousing bolt pattern for the $S55$ engine block. It will not bolt directly to the $N55$ or $B58$ blocks without modification.

  4. Peripheral Components: A complete swap set should ideally include:

    • The dual-mass flywheel and clutch pressure plate.

    • The manual-specific driveshaft (which differs in length from the DCT version).

    • The shift linkage and the interior boot/knob assembly.

Average Rating

4.48
33 Review
5 star 49%

4 star 52%

3 star 0%

2 star 0%

1 star 0%

33 reviews for BMW M2 F87 M3 F80 M4 F82 6-speed manual transmission GS6-45BZ 7858800

  1. Mia Thompson (verified owner) –

    Test environment content.

  2. Hannah Young (verified owner) –

    Stable ride shown in preview.

  3. Hannah Young (verified owner) –

    Modern lighting effect in interface.

  4. Ryan King (verified owner) –

    Clean integration in layout view.

  5. Natalie Adams (verified owner) –

    Clean integration in layout view.

  6. Matthew Scott (verified owner) –

    Lighting appears bright and modern in design.

  7. Aaron Hughes (verified owner) –

    UI placeholder content.

  8. Amelia Brooks (verified owner) –

    Transmission behaves smoothly in layout.

  9. Benjamin Wright (verified owner) –

    No irregular behavior shown in the interface.

  10. Lily Anderson (verified owner) –

    BMW Gearbox

  11. Lucy Bennett (verified owner) –

    Fender appears well-aligned.

  12. Ava Thompson (verified owner) –

    Used in website prototype.

  13. Natalie Adams (verified owner) –

    Strong visual styling in product display.

  14. Aaron Bennett (verified owner) –

    BMW Gearbox

  15. Stella Parker (verified owner) –

    Braking response appears fast and stable.

  16. Grace Adams (verified owner) –

    Used for product page preview.

  17. Michael Harris (verified owner) –

    Used in website prototype.

  18. Jack Richardson (verified owner) –

    Engine performance appears strong in this demo setup.

  19. Nathan Scott (verified owner) –

    Fender alignment looks perfect.

  20. Caleb Hughes (verified owner) –

    BMW Engine

  21. Daniel Wright (verified owner) –

    BMW Bumper

  22. Sophie Young (verified owner) –

    BMW Wheels

  23. Christopher Nelson (verified owner) –

    Not real data.

  24. Grace Adams (verified owner) –

    BMW Bumper

  25. Michael Harris (verified owner) –

    Well-designed display.

  26. Hannah Green (verified owner) –

    BMW Headlights

  27. Charlotte Reed (verified owner) –

    Very strong visual quality.

  28. Ava Mitchell (verified owner) –

    Very strong visual quality.

  29. Hannah Green (verified owner) –

    Very convincing product presentation.

  30. Matthew White (verified owner) –

    Bright and clear lighting effect.

  31. Scarlett Adams (verified owner) –

    Braking response looks fast and controlled.

  32. Scarlett Adams (verified owner) –

    BMW Wheels

  33. Ethan Hughes (verified owner) –

    Nice balance of style and strength.

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