Gearbox & TCU Remapping

Gearbox & TCU Remapping

The Missing Piece to Your Performance Tune

You’ve remapped your engine’s ECU… but what about its partner?

Every modern automatic or semi-automatic gearbox (like a VW DSG, Audi S-Tronic, or BMW ZF) has its own computer, the TCU (Transmission Control Unit). This “gearbox brain” controls everything—when to shift, how fast to shift, and how much power it’s allowed to handle.

Your vehicle’s stock TCU map is built for comfort and emissions, not performance. It’s programmed with low torque limits that can actively fight against your newly remapped engine, cutting power and giving you slow, lazy shifts.

A TCU remap from Milesback unlocks the true performance of your transmission, making it smarter, faster, and stronger. It’s the essential second step to fully unleashing your car’s potential.

Common Problems a TCU Remap Solves

  • Your tuned car feels “held back” or sluggish.
  • Slow, “slushy” gear changes that lag when you demand power.
  • The gearbox auto-upshifts in Manual/Sport mode right at the redline.
  • The gearbox auto-kickdowns when you don’t want it to.
  • DSG clutch slippage after a Stage 1 or Stage 2 engine remap.
  • Frustratingly low RPM for Launch Control.

The car feels jerky or hunts for the right gear in traffic.

The Milesback Gearbox Tune: What We Do

We connect directly to your vehicle’s TCU and professionally rewrite its software, tailoring it to your engine’s performance and your driving style.

Key Benefits of a Gearbox Remap:

  • ⚡ Faster Gear Shifts: We can increase shift speeds by up to 30%. Shifts become faster, crisper, and more responsive, both up and down.
  • 🔒 Raised Torque Limiters: This is the most critical part of tuning. Your stock TCU will “panic” when it sees the new power from your engine remap and will cut engine power. We raise these limiters to allow the gearbox to accept and use the engine’s full, new performance.
  • 💪 Increased Clutch Clamping Pressure: (For DSG/S-Tronic) This is the fix for clutch slip on tuned cars. We command the clutch packs to “grip harder,” allowing them to safely hold the extra torque and preventing premature wear.
  • 🏁 True Manual Mode: We can disable the forced “kick-down” and “auto-up-shift” in Manual/Sport mode. This gives you, the driver, 100% control. The car will hit the rev limiter and hold the gear, just as it should.
  • 🎯 Optimised Shift Points: We can change when the gearbox shifts.
    • In “Drive” (D): We can make it hold gears slightly longer to prevent labouring, or shift earlier to improve fuel economy.
    • In “Sport” (S): We make it hold gears longer, closer to the redline, for a much more aggressive and sporty drive.
  • 🚀 Improved Launch Control: On performance models (like Golf R, Audi S3), we can fine-tune the launch control RPM for a much more aggressive and faster launch from a standstill.

An Engine Remap is Only Half the Job.

A stock gearbox tune is the bottleneck for a tuned engine.

Without a TCU remap, you are not getting the full power you paid for with your engine tune. The TCU will be actively limiting your engine’s output to protect itself.

A TCU remapunleashes your engine tune and protects your transmission hardware by allowing it to handle the power correctly. For any Stage 1, and especially a Stage 2 vehicle, a gearbox tune is essential.

A Note on Insurance: A gearbox remap is a modification. We advise all customers to inform their insurance provider of the change to ensure their policy remains valid.

Why Choose Milesback for Your TCU Tune?

  • We Are ECU & TCU Specialists: We understand the complex relationship between the engine and gearbox. We tune them to work together in perfect harmony.
  • Hardware Protection is Key: Our maps are written to deliver performance safely. Increasing clutch clamping pressure protects your gearbox from the new-found power.
  • Genuine, Licensed Tools: We use the latest, official tuning tools for transmission programming. This is a complex process, and using the right tools is critical to avoid damage.
  • Custom-Written Maps: We don’t use generic files. We tailor the TCU map to match your engine’s remap and your personal preferences.

Complete Your Vehicle’s Transformation

Stop letting your gearbox hold you back. Contact us today to pair your engine remap with a TCU tune for the ultimate performance package.