I have a 5.3/4l60 swapped 1990 rcsb, when I did the swap I had 3.08 gears and just changed them out for 4.10's. When the peramiters for the speedo are changed the computer reads out the right speed but the speedo is still off. The speedo was right on with tje old gears but it won't read different on my dash but the laptop reads out the correct speed off the trucks computer? Any ideas could the speedo be on the wrong wire?????