Please fill out the following to ask a question. MAKE:Volts wagon MODEL:Jetta Wolfsburg edition YEAR:2007 MILES:145,000 ENGINE:2.5 DESCRIBE ISSUE.... The transmission is clunking in reverse. I'm guessing the transmission fluid has never been changed. And I am wondering if changing it at this point would even help. This is the 1st car I've ever had that had a sealed transmission. And I don't think I like them. Has anyone heard of these transmissions cunking in reverse and if so can a fluid and filter change fix this.