xHP ZF 6HP 6-Speed Transmission Tune for BMW | TCU Software Upgrade & Gearbox Remap (6HP19/21/26/28) | Stage 1/2/3 | Faster Shifts, Paddle Response, Raised Torque Limits

xHP for BMW ZF 6HP: transform your 6‑speed auto into a sharper, smarter drivetrain

Give your BMW’s 6‑speed auto box a serious upgrade with the xHP calibration for ZF 6HP units. This refined transmission control reflash delivers quicker gear changes, cleaner shift logic and stronger clutch pressure control for a more connected drive in Drive, Sport and Manual. We run these maps on our own cars and on customer vehicles and the feedback is consistently brilliant for responsiveness, smoothness and performance.

Whether your engine is standard or tuned, this software optimises the way the gearbox communicates with the engine for better acceleration, crisper paddle input, improved torque converter behaviour and confident torque handling. Common ZF variants covered include 6HP19, 6HP21, 6HP26 and 6HP28 across numerous petrol and diesel BMW platforms.

Highlights and benefits

• Auto box software flash for ZF 6HP 6‑speed units used in BMW applications
• Quicker upshifts and downshifts with consistent shift quality in all modes
• Refined shift strategy for climbs and descents to keep the right gear at the right time
• Tighter torque converter lock‑up for a more direct, engaging feel
• Higher torque capacity to support power‑increased builds
• Manual mode kickdown delete and true manual control options
• Optional gear indicator in the cluster for D, S and M
• Customisable behaviour so you can tailor the drive to your preference

Stages explained

Stage 1

• Reworked Drive shift points for a sporty yet efficient commute
• Adaptive mapping for gradients to reduce unnecessary shifting
• Improved warm‑up logic
• Earlier and stronger lock‑up in 1st, 2nd and 3rd for a tighter feel
• Lower manual mode minimum rpm for better control
• Torque limit adjustments for light tuning
• Kickdown disabled in Manual if desired
• Gear readout available in D, S and M

Stage 2

• Revised D and S shift points for stronger part‑ and full‑throttle acceleration
• Firmer, sportier gear changes in every mode
• Faster paddle response to reduce input delay
• Hill‑aware shift logic to hold the right ratio
• Optimised warm‑up behaviour
• Enhanced torque converter strategy for a more connected drivetrain
• Raised torque thresholds for tuned engines
• Kickdown delete option in Manual
• Dash gear display in D, S and M

Stage 3

• Aggressive D and S mapping for maximum acceleration
• Race‑style upshifts with torque increase during shifts
• Approx. 50 percent quicker shift times in S and M
• Approx. 25 percent quicker shift times in D
• True Manual mode without automatic upshift
• Automatic rev‑matching blip on downshifts in S and M where supported
• Very fast paddle response
• Gradient‑aware strategy, improved warm‑up and enhanced lock‑up in lower gears
• Further increased torque handling for higher power builds
• Kickdown delete option in Manual and gear display in all modes

Adjustable features

• Max RPM: Set your own WOT shift points per mode, with or without kickdown.
• Kickdown: Enable or disable the kickdown switch per mode. Disabling reduces unwanted downshifts at full throttle in Manual.
• Gear display: Choose Default, Off, show actual gear or show target gear in the cluster.
• Start in 2nd in M: Decide whether the car holds 1st or 2nd at standstill in Manual.
• Throttle blips: Adjust downshift blip intensity for rev‑matching where supported, commonly on N54 and N55 cars.
• Custom shift points: Globally raise or lower shift points in D and S by percentage.
• M‑mode shift feel: Fine‑tune upshift firmness in Manual to suit your preference.
• Lock out 6th in S: Optionally prevent 6th in Sport for punchier response on the motorway.

Fitment and typical applications

For BMW models fitted with ZF 6HP 6‑speed automatics. Popular mechatronic codes include 6HP19, 6HP21, 6HP26 and 6HP28 across a wide range of petrol and diesel BMWs.

Professional flashing and support

Prefer expert installation We can help. MJ Modifications in Warwickshire offers in‑house flashing and setup. Request a quote at info@mjmodifications.co.uk and we will recommend the ideal Stage for your build and usage.

Buy with confidence

Trusted by enthusiasts, this calibration elevates the BMW driving experience with snappier gear changes, better paddle feel and a more direct link between engine and drivetrain. We use it ourselves and our customers love the transformation for daily driving, fast road and performance builds.

Search terms customers use

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