Brought my van in for the annual service and told them I had a problem with the transmission slipping in reverse. They called in less than 30 minutes and told me the vibrations I felt reversing was not from the transmission but from the engine because the engine mounts were bad. They replaced all the engine mounts and serviced the transmission that same day and I picked up the van before they closed. No more vibration in reverse and engine starts up in the morning a lot quieter with the new mounts.