Since introduction of the ZF 6HP transmissions, in BMW vehicles in the early 2000s they remained a blackbox for Tuners and car enthusiasts worldwide. The ZF6HP units were used throughout the whole BMW range, from the 1-series hatchbacks, to the mighty Alpina B5 cars, putting out around 500 bhp and 700 Nm of torque.
While the hardware stays widely the same, throughout all applications and is mainly divided in only 2 types (6HP19/21 and 6HP26/28), the software inside the controller makes it possible to adapt the transmission, to every vehicle and mimic a wide range of driver styles. Smooth and comfy in the Diesel applications, the same transmission can be tweaked to deliver snap-on take-off behavior, surprisingly fast shift times and even race-style throttle blips on downshifts.
Tweaking your transmission is not only about getting quicker, or holding more power. An automatic transmission is deeply involved into vehicle dynamics and contributes very much to the overall driving experience. From crawling in traffic, over city driving, to taking your vehicle to the drag strip or a race track, the TCU widely defines how your car feels. Like everyone drives different with a manual, the maps inside the TCU hide the secrets to tweak your automatic transmission to your personal likings and finally experience what BMW promised you once in the glossy brochure: Sheer driving pleasure!