Hi Guys,
I've just completed an engine and trans conversion from T5 to a BTR 4 speed because it's my work ute and I am sick of driving a manual in traffic every day. It's all running, swapped ecu, bcm and ign from doner car and all runs good except my speedo is out by 20kms at 100kms. When speedo says 100 I'm actually doing 80. Any advice?