Hyundai ix35 Gearbox & Transmission Problems
Why does my 2013 Hyundai ix35 feel sluggish?
It sounds like you’re on the right track with the transmission, Melissa. Transmission oil goes black when it starts to pick up bits of burnt clutch and band material shed by the gearbox’s internal parts. If that’s happening, there’s also a good chance that the transmission is worn and that’s causing the lack of acceleration and slipping you’re experiencing.
This sort of problem can be caused by low transmission fluid levels, a worn out pump or just plain old wear and tear. A check of the torque converter’s health would also be a good idea, but on the surface, it sounds like the transmission is ready to be rebuilt. Have the vehicle scanned and see what faults – if any – are thrown up by the computer. It could be something simple, but the black transmission fluid tends to tell a different story. It should be a nice, clear red colour.
Hyundai ix35 2010: Drops out of gear
It's always hard to find the cause of a problem you can't witness firsthand, so the only thing you can do at this stage is persist with the dealer and hope they can track it down for you. In the meantime note every instance of the issue, recording time, place, circumstances, engine speed, gears etc. so you can give the dealer the maximum amount of information possible.
Hyundai ix35 2010: Dropping out of gear
Straight back to the dealer. If the dealer doesn't know what is causing the problem they can call in the experts from Hyundai. Your car is still under warranty, so Hyundai is responsible for fixing the problem to your satisfaction.