New rear = WTF speedo

[transamws686]

I have this question for you guys; I finally have the mosser 12 bolt in the car.....3 mos later but none the less IN. I noticed after driving it around that my speedo is way out of wack, any ideas on what to do. Normaly I am around 20 miles an hour faster on the speedo then actual speed.

[Batman]

I assume you changed gear ratios, you are going to need to get it tuned for the new speedo calibration. Talk to Foff667.

[V]

yea, obviously if you have different gears the speedo will be off.