I've had a DM Speedcal on my car for 2 years now, never had any issues. However, I put my built rear in today with 4.56's, changed my speedcal settings, started it up and took off... About a tenth of a mile into the trip at about 25mph in 3rd gear I look down and notice my speedo is wrapped around to 120. I have checked and rechecked my settings I don't know how many times.
I'm sure most of you will say to ditch the speedcal and change it with my tuner, but I don't want to unless that's my last resort. I could really use some input here.
I'm sure most of you will say to ditch the speedcal and change it with my tuner, but I don't want to unless that's my last resort. I could really use some input here.