Hybrid Eclipse Cross: Transmission Troubles & Strange Noises

Hey there, I had very similar issues with my 2019 Mitsubishi Outlander PHEV last summer at 65k km. The symptoms you're describing match exactly what I experienced, especially that grinding noise during shifts and the whining sound. Took it to the dealership since I didn't want to risk having a non-specialist work on the hybrid system. Turned out it wasn't the transmission oil pressure cooler, it was actually a faulty valve cable connection that was causing irregular transmission fluid pressure. The grinding was happening because the transmission wasn't getting consistent pressure during gear changes. It was a serious issue that needed immediate attention because it could've led to complete transmission failure if left unfixed. The repair involved replacing the valve body assembly and recalibrating the transmission control module. If you're in this situation, I'd strongly recommend going to a certified Mitsubishi dealer or a specialist who's certified to work on hybrid powertrains. Regular mechanics might miss the hybrid-specific components that could be causing these symptoms. Best of luck getting it sorted.

Thanks for sharing your experience! That's really helpful. Glad I'm not the only one who's had this issue. I'm planning to take it to the dealership next week, your comment about hybrid specialists makes total sense. Quick question, do you remember roughly how much the repair set you back? Also, has everything been running smoothly since the fix, or have you noticed any other quirks?

Hey again! Great to hear you're taking it to the dealership! Just wanted to update you, since getting mine fixed, it's been running like a dream. Not a single problem with the transmission, and that annoying grinding noise is completely gone. In my case, the final bill came to 170€ for fixing that faulty valve cable connection. Pretty reasonable considering how serious the issue could've become if left unchecked. The transmission oil pressure cooler turned out to be perfectly fine once they sorted out the valve issue. I've put about 15,000 km on it since the repair and honestly, the transmission feels even smoother than when I first bought the car. No more weird noises or rough shifting, it's like having a new car again! Just make sure to mention these specific symptoms to the dealership. They'll know exactly what to look for, especially since it seems to be a somewhat common issue with our models. Let me know how it goes at the dealership! I'm curious to hear if they find the same problem in yours.

Thanks so much for all the details! Just got back from the dealership today and wanted to update you on what happened. You were spot on about going to the specialists. Turns out my issue was similar but not identical to yours, they found a worn-out solenoid in the transmission that was causing all the drama. Cost me a bit more, around 250€, but honestly, it was worth every penny. The whole experience was way better than my last mechanic. The dealership team knew exactly what they were doing with the hybrid system, and they even gave me a detailed walkthrough of what was wrong. Been driving it for a few hours now, and what a difference! No more grinding, no whining, just smooth sailing. Really appreciate everyone's input here, especially yours. You saved me from potentially making things worse by going to a regular mechanic. Guess sometimes you just need to bite the bullet and go to the specialists, right? Time to enjoy my properly functioning car again! Thanks all!