I just swapped my 4r70w from my 94sc to one from a 2000 mustang and my odometer is about 12mph fast.Anyone know what speedo gear i need to correct this and where to get it?The car has stock wheels/tires and stock gear.
According to the Gear calculator here on the site, you need a 20 Tooth Orange gear # C8SZ-17271-B
That still might not fix your speedo 100%, but it will be close.
