I am having trouble getting my speedometer to read correctly. I have a GMPP LS3 and E67 ECU. The transmission is a TKO 600. I have changed the tire size to 26.7? (27540R18) and the final drive ratio to 1.59 to correct for the stock 40 VSS reluctor GMPP ECU setting. The speedometer is approximately 10-12 mph off. I am using Dakota Digital VHX gauges and their BIM 2 OBD module.
Question, In Speedometer setting- Hardware, Speed output type- should it be set to Vehserial, wheelspd or vehrep TOS? What should the setting be in Vehicle Speed Sensor - Vehicle Speed Output- Disabled, Serial or Rep TOS?
Thanks