[todd95GT]

When it was gear time for my '95, it cost more for the disc rear to begin with . It then went from 400 to 600 by the time all was said and done, parts and labor including the gear in the T-5 tailshaft. Supposed to be within 2-3% at that point and right now, I guarantee any factory speedometer at any speed is 2% off anyway.
Not to start a flame war either, but every car, don't care how much or how little, is not 100% accurate from the factory. Too many variances right down to air pressure in the tire that offsets sidewall height that will change a speedometer. Law prohibits the writing of speeding violations for anything under 5mph over the speed limit because of the vehicle manufacturer's admittance that they can not get a speedometer to be perfect and there need be a way to account for that variance in actual speed versus read speed. I have seen cars within one mph or dead on within a certain range, but take the same car at 10mph that read perfectly dead on at 50, and it might be 3% off. No one will ever have a perfect speedometer, it's just impossible.