howdy hoes
ok well im getting my hands on a reco'd lsd and 3:89 gears to suit,
its all going in an auto 6cyl au fairmont, origonaly live axle single spinner 3:23
now the question is do i need a speedo corrector (jaycar or shiftkits) between the speedo sensor in the gearbox and the cluster to correct the -20% speed difference
and
also another speedo corrector between the cluster and the speedo input into the ecu to correct the shift pattern to prevent over reving?

would love to know which pin the speedo input is to

in the tech pages you will find AU cluster pinout info that you need to tap into

you can correct the speedo AND fix the shift points with one corrector

intercept the cluster input signal with the corrector as normal

then find the cluster speedo output wire, cut it, and run the loom side of it back to the original connection you made with the speedo corrector so that it will see the speedo signal before its tampered with

Cheers found the pinouts, rhs plug. 17 in 18 out
Haa sweet sounds easy as
The corrector will need power and ground right?
Pin 1 (power ground), pin 4 (ignition power)?

i just tapped into the ciggarette lighter wires in my old EF............. you could do that in the AU, just make sure the AU doesnt have some weird 1hr delay power turn off (like the CD player) or the speedo corrector could drain your battery, as i found out when i first tried tapping power from the trip computer

edit: heres a dodgy diagram i did awhile ago. Note the brown wire is the SPEEDO OUTPUT WIRE FROM THE CLUSTER which you cut, then tap the loom side back into the original connection. This brings the shifts back to normal