Does the AAW give you wires to the speedo, I assume you have a modern T-5 with a pulse output. I don't remember one in my AAW kit. Usually on a pulse signal it's best to use a twisted pair of wire and the shield is a plus, this keeps the noise down. Now if you want to use plane wire, route the wires from the transmission to under the dash and stay away from inside the engine bay. This way you wont pick up less noise form plug wires and such, this may work no promises.

Foxbody Mustangs ran O2, VSS, and Transmission wiring in same route bundled together in same harness.

May want to see if VSS wiring were twisted together, if so do the same with new routing.

When you refer to shielding...wire harness or foil covered  wiring ?

Last edited by Nos681 (1/10/2021 11:10 PM)

The VSS is basically a little generator that put out a voltage pulse. Around 20 Hz at 60 MPH. I've have run communication circuits, at much higher frequency, short distances without issues. It will work with with the plane wire, but it could pick up noise and the speedometer may start bouncing. You would have to ask yourself how much work would it be if this happens, to replace with the supplied cable. If you run the supplied cable it's best to ground 1 end of the shield.

Last edited by wsinsle (1/11/2021 8:11 AM)

i was wanting to use all of the wiring that came with the AWW harness that way i have a clean install with a couple plugs that connect to my instrument panel.  IfIi use the plug and lead Speed hut supplied with the speedo I would have to run that lead down to the trans sensor.  I would then have another plug to connect and disconnect and another branch of wires to run to sensor.  Not a big deal either way just was wanting to make as clean and neat as possible.