DiffDriver Instructions

Installation info:

Pinout and bolt spacing are laser engraved on the unit for quick reference.

Detailed pinout and wiring instructions:

  1. Signal: Wired to the PWM ground output signal from your standalone ECU or chosen control device. 
    1. Suggested wire gauge: 20, external pull up NOT required, internal 5V pull-up already present.
  2. Override (optional): Generally wired via a toggle switch to chassis ground, but this function can be enabled by any means of applying ground to this pin. 
    1. Suggested wire gauge: 20, external pull up NOT required, internal 5V pull-up already present.
  3. Ground: It is imperative that you connect this to a very good chassis ground point. Use high quality 16 gauge wire. Keep length under 5 feet.
  4. 12V: Connect to a switched 12V source capable of delivering 10 amps continuous to this circuit. Use high quality 16 gauge wire. Keep length under 5 feet
  5. Coil +: Wire to one of the two factory differential coil wires on the chassis side of the transmission harness connector. Use high quality 16 gauge wire, keep length under 5 feet.
    1. We suggest wiring both coil wires to the chassis side of the transmission harness containing the differential coil wiring to retain ease of transmission servicing (not having to cut wires if you ever remove the transmission).
  6. Coil -: Wire to the other differential coil wire, so Coil + goes to one wire, and Coil - goes to the other, polarity does not have to match. Use high quality 16 gauge wire, keep length under 5 feet.
    1. We suggest wiring both coil wires to the chassis side of the transmission harness containing the differential coil wiring to retain ease of transmission servicing (not having to cut wires if you ever remove the transmission).
  7. Disable: Wire to the e-brake switch, and confirm the other side of the e-brake switch connects to chassis ground. Ensure ground is only sent to the Disable pin while the e-brake is active.
    1. Suggested gauge: 20, external pull up NOT required, internal 12V pull-up already present.
    2. Alternate option: If no e-brake is fitted, or if you want to activate this feature with a switch or button in addition to e-brake actuation, the choice is yours as long as you send ground to the DiffDriver input pin when you want to disable electronic lockup.
  8. No Connect: Unused

Notes: 

Inputs are protected against general mis-wiring, but not intended to be left in that state for extended periods of time.

The signal, override and disable inputs are enabled by sending ground. They are “active low” inputs, and all have internal pull-ups, so wiring is as simple as it looks.

The wire gauges suggested are based on the amp requirements, and the fitment range of the terminals used, which is 16-20 AWG. We specify keeping some wires under 5 feet due to safe wiring practices with 16 AWG and 10 amp current at 12V, accounting for transmission harness length.

When choosing ground points, find clean bare metal, nothing painted or corroded, and secure them well to ensure good contact. While the product might still work with sub-optimal ground inputs, we suggest using points with less than 5 ohms of resistance to the negative battery terminal.

The blue LEDs on the module provide an easy way to check the module's status. With the unit mounted so the text is right side up, the bottom LED lights up when the power system is ready. The top LED lights up based on differential control output (OFF = OFF, 100% brightness = 100% duty cycle, and brightness in between varies as your duty cycle does).

Mounting:

To allow for greater installation flexibility, the device has 2 mounting points and is quite small. We suggest securely mounting DiffDriver Clubsport in the cabin with 4mm hardware (supplied). Please locate the unit safely, and away from high heat sources i.e. cooling or exhaust components. Suggested mounting is within 5 feet of the transmission harness connector for the differential coil, to ensure high amperage wire lengths are not excessive.          

Mating connector and pins (sold separately):

  • 1 AT06-08SA (or DT06-08SA), or DT06-08SA-E008 if you want to boot it
  • 1 AW8S Wedgelock
  • 7 AT62-201-16141 Terminals (can accept 16-20 AWG wire)

Suggested use:

  • 100Hz - 250Hz Signal frequency recommended (dependent on load), Subaru suggested base frequency 100Hz.
  • While DiffDriver has been tested to sustain full lock operation, we don’t suggest leaving your Differential 100% locked for long periods of time because the differential coil itself may overheat eventually.
  • Tuning the DiffDriver Clubsport unit is up to user discretion. Generally you want to increase lockup as engine output increases, Common control strategies include throttle position, vehicle speed, brake pedal switch input, but by taking advantage of the power of a modern standalone ECU, digital dash or other control device, you can develop even better strategies which account for actual engine torque output, G forces, steering angle, and much more.