2015 JGC EcoDiesel Summit 29,000 mi. 4 months ago had to have upper oil pan resealed due to leak.. Under warranty, took 2 weeks to complete. Last week began noticing oil drips on garage floor from differential, dealer says differential will need to be replaced. Still under warranty but this will take about 2 weeks according to dealer. Has anyone else had leak issues? Kind of annoying. I overall really like the vehicle but quality control on these items seems poor. Never used off road