Alphaspeed TCU Tune Service — 2013-2016 Genesis Coupe (BK2) 8-Speed Automatic

Tired of your automatic Genesis Coupe shifting like it's afraid to wake the neighbors? Alphaspeed's TCU tune unlocks the full potential of your BK2's 8-speed transmission — letting it rev out like a manual and shift with purpose.

Available in two stages to match your build goals:

• Stage 1 — Raises shift points so you can ride the full powerband, just like a manual. Also disables auto-upshift in manual mode so you stay in control.
• Stage 2 — Everything in Stage 1, plus significantly faster shift speeds for a more aggressive, performance-oriented driving experience.

Compatibility

• 2013-2016 Hyundai Genesis Coupe 2.0T & 3.8 with 8-speed automatic transmission
• TCU tune only — for engine tuning, see our Alphaspeed ECU tune service

Important Notes

• ⚠️ Requires an ECU tune adjustment — the stock ECU may hit rev limiters without it
• ⚠️ Some TCUs may trigger a transmission oil pressure warning light. This is a known Hyundai issue  (TSB 14-AT-006-1)
  
• ⚠️Transmissions having shift flare issues also may need TSB work done by Hyundai for bad solenoids (TSB 21-AT-018H)
• ***FOR PRETUNED ORDERS***
  ⚠️ CRITICAL: TRANSMISSION RELEARN REQUIRED IMMEDIATELY UPON INSTALLATION
  Your new custom-tuned Transmission Control Unit (TCU) has been successfully programmed and is ready for use. Because this is a replacement physical module, its internal adaptive memory chip currently holds learned mechanical specs from a different donor vehicle.
  
  
  
  
  When you first drive the car, it WILL likely exhibit shift flares (RPM slipping upward mid-shift) or harsh gear engagements. This is normal and expected until the module adapts to your specific car.
  To prevent transmission slipping and safely force the TCU to map itself to your transmission's physical clutch tolerances, you MUST complete the following drive cycle immediately after installation.

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  STEP 1: Bring Transmission Fluid to Operating Temperature
  • Start the vehicle and drive it very gently for 10–15 minutes.
  • The TCU will not save new adaptation data if the transmission fluid is cold. The fluid must reach full operating temperature—ideally between 140°F and 200°F (60°C - 93°C)—before proceeding to Step 2.
  STEP 2: Controlled Low-Throttle Upshifts
  • Find a long, flat, and quiet stretch of road.
  • From a complete, dead stop, accelerate smoothly while holding your foot completely steady at only 15% to 20% throttle (a light, easy cruise).
  • Allow the transmission to steadily and sequentially cycle through every single gear, from 1st gear all the way up to 8th gear. Do not accelerate aggressively.
  STEP 3: Natural Coast-Down
  • Once the car successfully reaches 8th gear, take your foot completely off the gas pedal.
  • Let the vehicle coast naturally all the way down to a complete stop.
  • Avoid braking aggressively if possible; letting the car downshift on its own tells the TCU how to map its deceleration fluid pressures.
  STEP 4: Repeat 10 to 15 Times
  • Repeat the exact dead-stop to 8th-gear acceleration and coast-down sequence 10 to 15 times consecutively.

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  What to Expect:
  With every consecutive pass, the TCU's internal processor will measure the exact millisecond delays of your physical clutch packs, calculate the correct fluid volume offsets, and overwrite its old memory blocks. You will notice the shift flares shrinking with each pass until they disappear entirely.
  Failure to perform this controlled drive cycle right away can lead to severe clutch slippage, fluid glazing, or permanent transmission damage.
  
  
  
  

This is a mail-in service. Send us your TCU and we'll tune and return it ready to install.