We're using a B&M Trans Kit to freshen up our AOD. Remember, there are two basic types of AOD transmissions. Early AOD transmissions have cast-iron clutch drums and hubs inside, which means they call for a different Trans Kit than newer AODs with stamped-steel clutch drums and hubs. The same can be said for other components tied to these clutch drums and hubs. It must all match. Be specific when you order your B&M kit. If you're not sure what's inside, remove the pan and valve body to confirm.