Hey my friend had a 3.73 gears in his car but then upgraded to 410. with an A4. He used the SLP speed control module cuz his car came stock with 2.73;s so we recalibrated the speedo with the module. So basically we need the instructions on how to change this so the speed will be accurate for the 4:10's. Weve emailed SLP and they dont resonded to them. Any help greatly appreciated.
Tom
Tom