gazza

Hi All, New here so hope you can help. I have a Hilux that has the ADD button lock 4 wheel drive chain driven tranfer case and I want to use the gear driven type. Does anyone know how I can bypass the wiring on the transfer case but still use the ADD system on the diff. I was hoping that I could use the 4wheel detent indicator on the transfer case to activate the 4 wheel drive for the diff. Any suggestion on how to or any wiring diagram that may assist.