SevenBizzos

Been on awhile, and posting first time. 2018 Sport I called my local dealer to have the PTU fluid changed. The service manager said they've never changed fluid in a PTU. That it can not be done. I mentioned to him that most everyone I've heard from recommends this at 20k-30k. He said the only work he's ever seen on a PTU is a seal replacement and total replacement. This is a pretty big dealership and has been in business a long time What gives here?