The ZF 8HP70 transmission is an 8-speed automatic transmission developed for various BMW models. 

When enhancing engine performance, it is crucial that the transmission is upgraded as well, ensuring that it will reliably perform under the increase in power generated by the engine.

DEKA excels in providing high-quality transmission upgrades, using expert engineering and the careful replacement of high-wear, OEM components with CNC-machined billet elements, increased frictions, and craftsmen assembly.

Benefits include greater holding power and durability, reduced clutch slippage, and enhanced performance.  

Each level of upgrade provides greater torque rating, offering a unique solution for each build, driver preferences, and budget. 

Variations

Stage 1 (950TQ / 1300Nm) - Enhanced Street Performance

The Stage 1 upgrade is designed for enthusiasts looking to increase their transmission’s performance while maintaining an OEM-like feel. This upgrade replaces high-wear OEM components with precision-engineered billet parts, increasing durability and torque capacity. Ideal for mildly tuned vehicles, Stage 1 ensures improved power transfer, reduced clutch slippage, and smoother shifts without compromising daily drivability.

This upgrade includes 5 upgraded clutches, steel billet E hub, and an aluminum billet A piston.

Included in this:

• A Clutch:
  1 Deka Aluminum Billet Piston
  6 Deka Friction Plates
  6 Deka Steel Plates
  1 Deka Pressure Plate

• B Clutch:
  5 Deka Friction Plates
  1 Deka Bottom Plate
  5 Deka Steel Plates

• C Clutch:
  7 Deka Friction Plates
  8 Deka Steel Plates

• D Clutch:
  1 Deka Pressure Plate
  5 Deka Friction Plates
  5 Steel Plates

• E Clutch:
  Deka Steel Billet Hub
  7 Deka Friction Plates
  7 Deka Steel Plates

Stage 2 (1250TQ / 1700Nm) - High-Performance Upgrade

The Stage 2 DIY kit is designed for aggressive street builds and track-oriented applications. It features upgraded billet C and E hubs for increased durability, along with enhanced clutch packs to handle significantly higher torque loads. This stage is perfect for high-boost applications and those who demand sharper shifts and improved power delivery under extreme conditions, all while maintaining an OEM-like feel.

This upgrade includes 5 upgraded clutches, steel billet C and E hubs, aluminum billet A piston, and a modified OEM D piston.

Included in this:

• A Clutch:
  6 Deka Friction Plates
  6 Deka Steel Plates
  1 Deka Pressure Plate
  1 Deka Aluminum Billet Piston

• B Clutch:
  6 Deka Friction Plates
  1 Deka Bottom Plate
  6 Deka Steel Plates

• C Clutch:
  Deka Steel Billet C Hub
  9 Deka Friction Plates
  9 Deka Steel Plates

• D Clutch:
  1 Deka Pressure Plate
  6 Deka Friction Plates
  6 Steel Plates

• E Clutch:
  Deka Steel Billet E Hub
  8 Deka Friction Plates
  8 Deka Steel Plates

Stage 3 (1500TQ / 2000Nm) - Extreme Performance & Racing

For those demanding the ultimate in performance, Stage 3 offers the most robust upgrade, designed for high-horsepower builds and motorsport applications. Featuring billet steel pistons and fully optimized clutch packs, this upgrade maximizes torque handling and ensures extreme durability under intense conditions. Perfect for drag racing, circuit racing, and high-powered street builds, this DIY kit provides unparalleled performance and reliability while preserving an OEM-like feel.

This upgrade includes 5 upgraded clutches, steel billet C and E hubs, aluminum billet A piston, and a steel billet D piston.

Included in this:

• A Clutch:
  7 Deka Friction Plates
  7 Deka Steel Plates
  1 Deka Pressure Plate
  1 Deka Aluminum Billet Piston

• B Clutch:
  7 Deka Friction Plates
  1 Deka Bottom Plate
  7 Deka Steel Plates

• C Clutch:
  Deka Steel Billet C Hub
  11 Deka Friction Plates
  11 Deka Steel Plates

• D Clutch:
  1 Deka Steel Billet Piston
  1 Deka Pressure Plate
  7 Deka Friction Plates
  7 Steel Plates

• E Clutch:
  Deka Steel Billet E Hub
  10 Deka Friction Plates 
  10 Deka Steel Plates
  
  

  Stage 4 (1850TQ / 2500Nm) – Maximum Race Perfomance

  For enthusiasts and professional racers demanding the ultimate in torque handling, Stage 4 is the pinnacle upgrade for high-horsepower and motorsport applications. Featuring billet steel pistons, fully optimized clutch packs, and reinforced hubs, this upgrade delivers maximum torque capacity, extreme durability, and consistent performance under the harshest conditions. Ideal for drag racing, circuit racing, and high-powered street builds, this DIY kit ensures unparalleled performance while maintaining an OEM-like feel.

  This upgrade includes 5 fully upgraded clutches, DCT® billet steel C & E hubs, billet aluminum A piston, billet steel D piston, and billet steel E piston.

  Included in this:

  A Clutch:

• 8 Deka Friction Plates
  8 Deka Steel Plates
  1 Deka Pressure Plate
  1 Deka Billet Aluminum Piston

  B Clutch:

• 8 Deka Friction Plates
  1 Deka Bottom Plate
  8 Deka Steel Plates

  C Clutch:

• Deka Billet Steel C Hub
  13 Deka Friction Plates
  11 Deka Steel Plates

  D Clutch:

• 1 Deka Billet Steel Piston
  1 Deka Pressure Plate
  8 Deka Friction Plates
  8 Deka Steel Plates

  E Clutch:

• Deka Billet Steel E Hub
  12 Deka Friction Plates
  12 Deka Steel Plates
  1 Deka Billet Steel Piston