83 SEC odometer
I just bought this SEC w/138,234 mi. showing and maintenance records to 127,850 in '98. It has a trailer hitch. The problem I noticed is following a car doing 60 MPH,mine read 66MPH. The trip odometer turns .5 when it should be 1.0 miles. Question is could the rear gear cause this? Since it has a hitch the previous may have tweaked the drivetrain,or do I just need odometer-speedometer repair. Before I noticed all this the MPG calculated to be 8 MPG,actually it should be 16.