Quote Originally Posted by BrokenRhythm View Post
when converting to 3.29's? was there a noticable difference in performance? and how annoying is it that the speedo is off?
It won't affect your speedo since the reluctor wheel is on the diff, which isn't being changed out. You do need to have the PCM reprogrammed so it will shift at the right points. Also, without PCM programming the PCM will think the tranny is slipping (since there's more reduction with 3.29 instead of the stock 2.93).