I had a 2.73 drum rear end in a 1989 RS swapped a 3.42 disc limited slip and now the speedometer seems 10-15mph over/off. Which speedo gear/color do I need to correct this and how much will this set me back?? I apologize if this has been brought up before and am in the process of searching the old topic as well. Thanks in advance to any replies.

 

goto https://www.thirdgen.org/newdesign/faq/thirdgen.shtml and scroll down to the part where it talks about speedo gears. They don't cost much. Like $5 a gear.