Make note of the speedometer housing and clamp position before removing these parts. This electronic unit still uses a conventional drive and driven gear. The kit comes with a new speedometer drive gear that will match up with this unit. I mark the location of the clamp and housing to ease installation. Since the slinger on the original output shaft will not be reused, it can be removed with a long, two-jaw puller or similar means. I use the Jeep factory tool (PN MD998056-A) for this chore.