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ok cool
yes the autos wont change gears without speed signal to ecu ,plus I can flash ecu to change where it gets its speed signal from
on the older ba bf ecus I know how to sort out the speed signal problem as ive done a ba ute drag car with all wiring stripped and no abs and I got the factory speedo working thru the engine ecu
I recently wired an fg 6 cyl into old patrol and I got all the patrol gauges and idiot lights working just like factory so all it needs a few modules
and also these days Dakota digital make other modules which u plug into your obd2 plug and u can extract speed and rpm from the ecu data,
and u can even buy custom old school round gauges on a daisy chain wiring loom which plug into your obd2 connector and it gets signals from it too and very easy to wire,
just did some on an old hg Monaro with an l98 and 6 speed tip tronic auto ,
the hard bit is when people ring me asking stuff about getting gauges to work and half the time they ring me just chasing info so they can do it themselves so im abit blunt on the phone and tell them send me the wiring job and ill tell u what u need to do to get everything sorted once I have all the bits to do their job hehehe,
we just bought a house so im going to be broke for next 30 years or ill have to charge double hehehe