Speedometer correction
Moderators: robertisaar, dex
Speedometer correction
I'm new to this. I have alot of automotive knowledge but I'm still trying to figure out tuning. I recently changed my rear-end in my cng van and now the speedometer is way off like 10mph over on the highway. The dealership won't help at all so I'm stuck. I just need to reprogram it to read the correct speed.