The ZF 8HP has become the automatic of choice for engine swaps. Eight ratios, it holds serious power, and there are plenty of them around. The hard part has never been bolting one in. It has been getting the gearbox to cooperate once the factory engine computer is gone.
At the SEMA Show 2026, Haltech previewed its answer: the Ti8HP, a transmission interface that connects a Gen 1 8HP to a drive-by-wire Haltech Nexus ECU, with no third-party software or reflash tools involved. Here is what it does, what you need to run one, and when it is due.
The short version
- Connects a Gen 1 ZF 8HP45, 8HP70 or 8HP90 to a Haltech Nexus ECU
- Needs a drive-by-wire Nexus: R series, S series, Rebel or Plug-in. Not the T series.
- Works with factory BMW F and G series shifters, the Toyota Supra A90 shifter, paddles, a CAN keypad or a resistor ladder
- Flashes the gearbox through the Haltech system. No third-party tools.
- Expected price in Australia: $595 inc GST, including the pre-terminated harness
- Expected release: Q1 2027, date to be confirmed by Haltech
Pre-order the Haltech Ti8HP here.
Why the 8HP needs help talking to a standalone ECU
The 8HP's control unit doesn't shift on road speed and throttle position alone. It relies on information from the engine ECU, engine torque in particular, to decide how hard to clamp and how to manage each shift. In the donor car, that conversation happens between two factory computers. Swap in a different engine and a standalone ECU, and the gearbox loses the information it was built around.
The Ti8HP fills that gap. It sits between your Haltech ECU and the gearbox and passes across the signals the 8HP needs.
It is not a transmission controller
This is the point Haltech makes most clearly: "The Ti8HP is not a transmission controller." The 8HP's own control unit keeps doing the shifting. What changes is the software inside it. The Ti8HP reads the gearbox's original binary and flashes the Haltech binary through the Haltech system, and out of the box the car runs and drives as per factory.
From there you have adjustment in the Haltech software:
- Torque table. Prefilled and adjustable, and it sets line pressure and clamping force. This is the one that matters when the engine makes a lot more torque than the gearbox's original application.
- Shift load correction. Small adjustments to shift points.
- Upshift torque reduction. Pulls torque during the upshift for a sharper change.
- Downshift throttle opening. Controls the throttle blip on downshifts so they are smooth.
- Fault codes. Transmission faults show up on the ECU, so you are not hunting through a second system.
Haltech has also listed trans brake, clutch control and custom shift points as planned additions, with no date yet.
Why it has to be drive-by-wire
In Haltech's words: "The 8HP has no one-way clutches, so every downshift needs a throttle blip to match revs."
The ECU has to open the throttle on its own for every downshift, and it can only do that with an electronic throttle. A cable throttle setup won't work, and neither will a Nexus T1 or T2, because the T series isn't supported.
What you need
- A Gen 1 8HP: 8HP45, 8HP70 or 8HP90.
- A compatible shifter: factory BMW F series or G series, the factory Toyota Supra A90 shifter, wired-in paddle shifters, a CAN keypad or a resistor ladder.
- A drive-by-wire Haltech Nexus with electronic throttle control: R series, S series, Rebel or Plug-in.
- A brake pedal input wired to the ECU.
Is my 8HP Gen 1?
Check the model on the gearbox ID plate. The 8HP45, 8HP70 and 8HP90 are the Gen 1 boxes supported at launch. Later generations carry different model numbers, such as the 8HP50, 8HP75 and 8HP95, and are not supported yet. Haltech says Gen 2 support will follow, but has not given a date. If you are buying a gearbox for a swap now, buy a Gen 1 box.
Which Haltech ECU?
If you are already running a Rebel kit, it is the simplest path. The Ti8HP plugs straight into the transmission connector on the Nexus Rebel LS, Rebel JZ and Rebel K terminated harnesses.
- LS swaps: Haltech Nexus Rebel LS
- 1JZ and 2JZ swaps: Haltech Nexus Rebel JZ
- Custom wiring: the Ti8HP can be wired into any drive-by-wire Nexus ECU or VCU, including the Nexus S2, Nexus S3, Nexus R3 VCU and Nexus R5 VCU
A note on CAN
The 8HP's control unit talks OEM CAN at 500 kb/s. Haltech CAN runs at 1 Mb/s. The two can't share a bus, which is why the Ti8HP is a separate box. The upside is that your ECU keeps a spare CAN port free for other factory systems, such as ABS, a body control module or a factory dash.
Price and availability in Australia
Haltech expects the Ti8HP to sell for $595 inc GST in Australia, the same as its other Ti transmission interfaces, and that includes the pre-terminated harness. Release is planned for Q1 2027, with the exact date still to be confirmed.
We are taking pre-orders now. Orders are filled in the order they are placed once stock is released, and we will email you as soon as Haltech confirms the date.
Common questions
Does the Ti8HP replace the 8HP's TCU?
No. The factory unit stays and keeps doing the shifting. The Ti8HP is the link between it and your Haltech ECU.
Do I need HP Tuners or another flashing tool?
No. The flashing is done through the Haltech system, with no third-party software or reflash tools.
Can I run custom shift points?
Not at launch. You get shift load correction for small adjustments now. Custom shift points are on Haltech's list of planned features.
Will it work with a Gen 2 8HP?
Not at launch. Gen 2 support is planned, with no date yet.
I have a GM 4L auto, not an 8HP.
Haltech's Ti4L does the same job for GM 4L series gearboxes.
Planning an 8HP swap?
Tell us the engine, the gearbox and the ECU you are running, and we will work out what you need before you spend anything. Call 0458 998 395 or use the contact page. Racing Solutions is a Haltech dealer based in Perth, Western Australia.