Supports de sélecteur et sélecteurs séquentiels 8HP : ce qui se monte vraiment

There is no universal 8HP shifter mount, because the mount is a chassis-side bracket rather than a transmission part. What decides whether a shifter works is the protocol it speaks and how it is wired to the TCU. Get that right and the bracket is straightforward fabrication. Get it wrong and no amount of careful mounting will make the gearbox select a gear.

TurboLamik's manual lists four shifter categories for an 8HP swap: a CAN selector, a paddle or DCT sequential shifter, an analog selector, and an analog switch.

The wiring colours are not interchangeable between shifters

This is the most useful thing to get right before you cut or extend anything. The manual documents different colour conventions for two different sequential shifters, and the same colour means different things on each.

On the DCT shifter the colours refer to the wire supplied with the shifter, and the two switches are defined by which way the handle moves relative to the connector rather than by an upshift or downshift label. On the PMC shifter the same three colours carry 5V, ground and a single signal instead. Wiring one as though it were the other will not work, and it can put 5 volts where a ground switched input is expected, so identify the shifter before you terminate anything.

Mounting: what is actually being decided

The manual documents the electrical and protocol side, not bracket dimensions, so treat the physical mount as a fabrication task defined by three things.

1. The shifter's throw direction. The DCT shifter's two switches are defined by handle movement away from or towards the connector. Rotate the body 180 degrees in the car and you have swapped upshift and downshift unless you account for it in the wiring or the software.
2. Where the handle falls relative to your seat and hand. That is a driver fitment measurement off your own car, and no guide can supply it.
3. What the shifter body bolts to. A sequential shifter in a car that never had one needs a fabricated bracket to the tunnel, floor or a transmission-mounted plate. Check the shifter's mounting footprint when you buy it, then design the bracket around the position you want.

If you already run a factory floor selector, the mounting question mostly disappears and the job becomes getting the CAN protocol right.

Supported CAN selectors

The manual's supported CAN selector list is: F Series BMW 10 pin, F Series BMW 8 pin, G Series BMW or Supra 10 pin, E60 Lift 6HP28 6 pin, X1 E84, Dodge selector, Land Rover selector. Each is configured in the tuning software; for the X1 E84 the documentation says to set CAN 1 Type Selector to 30 and names a tested selector referenced as GW 9 260295. CAN keypads are also supported in 4, 5, 6 and 8 key versions from Blink and Ecumaster, on one condition: the keypad must be configured to the CANopen standard, and the manual notes they may ship at either 500 kb or 125 kb depending on the distributor.

Using paddles as a full selector

Paddles are not limited to shifting up and down. The manual states that a paddle shifter can operate as a full gear selector with only two analog inputs, covering shifting and going into Drive, Reverse and Park. Inputs 11 and 12 are ground switched and enabled by default.

Note the brake pedal in all three sequences. If the brake signal is not wired or not arriving over CAN, these sequences will not behave as documented. When paddles are combined with a CAN selector, the CAN selector is master, and the paddles are limited to upshift and downshift requests while a forward gear is selected.

The paddle inputs can also share a circuit with a second function through a multiplexed switch: set the MUX input to analog, set the paddle input to MUX and disable the invert setting on the paddles. A third free MUX switch can then drive an additional output, for example a horn.

One caution that applies to any analog selector: invert is set according to how the selector signals. If it switches to ground, enable invert. If it outputs voltage, disable invert. Setting invert the wrong way gives you a selector that reads backwards or not at all.

Frequently asked questions

Do I need a shifter at all? Yes. The "read before you start" page lists a shifter as a required item and offers the four options above.

Can I run paddles only, with no floor selector? Yes. Two analog inputs let the paddles select Drive, Reverse and Park as well as shifting, using the footbrake plus paddle sequences.

Can I mount a sequential shifter rotated? It will bolt up in whatever orientation your bracket allows, but the shift switches are defined by handle direction relative to the connector, so a rotated mount reverses your up and down inputs unless you compensate.

Which shifter is easiest to make work? A supported CAN selector, because the manual documents the protocol for each one. Paddles and analog shifters need the analog inputs configured and tested.

How do I check my paddle inputs are live? Analog inputs 11 and 12 are the paddle inputs by default and are enabled by default. If paddles do nothing, check those inputs and the invert setting first.

Next step

Tell us which shifter or selector you plan to run and which 8HP variant is going in, and we will point you at the matching wiring and configuration path. If you are still deciding between a sequential shifter and paddles, describe the car and how you will use it and we will talk through the trade-offs.

All shifter wiring, selector protocol and configuration information in this article is taken from the TurboLamik official manual at manual.turbolamik.eu.