2015 Scion TC Transmission and drivetrain Problems

“My 2015 Scion TC automatic has rough shift points, rough idle at stop signs. The Scion frs has the same issues and toyota issues a TSB for shift enhancement that fixed their transmission rough shifts and rough idle. I'm hoping that Scion or toyota are listening and we need this fix too! Resetting the computers by disconnecting the battery fixes the issue temporarily, since this is a 'learning' transmission, it always seems to default and starts to shift rough, shift too often or back to back even in city driving. It's gear hunting and I'm so sick of it. …”

“When parked in neutral with the clutch pedal not depressed while running my cars transmission makes a whining noise and only goes away when you depress the clutch pedal to engage the clutch. Once you release the clutch it continues making the noise. Hot and cold temperatures doesn't make a difference. The dealership thinks it's the bearing in the transmission but not 100% sure until I pay them to open transmission. Toyota has a history of bearings going bad in the TC transmissions and will not do anything and requests you to buy a new transmission.”

“Transmission jerks when slowing down to a stop, 50/50, it seems to be doing a hard downshift 2-1 before the stop. It's scary and feels like you got rear ended. There is also a click noise when the downshift happens. Took it to toyota and had a transmission drain and fill, which they said the fluid was as clean and the computer has no store codes. The reset the transmission control module and the issue has returned, it shouldn't have these issues at 19k miles! …”

“Transmission does a harsh/jerk downshift when coming to a stop. It does it randomly, usually when coming to a stop slowly. It's not safe, feels like the car lurches into 1st. Toyota reset the computer and it was ok for a bit but came back. I'm thinking it's the software of the car. Toyota said it's a learning transmission, but somethings wrong. It's scary to drive in traffic, and only have 33k miles. The transmission fluid was change by toyota last year with the ws and it has not fixed this issue. …”

“Whining noise is heard when the clutch petal is released. Noise is coming from the input shaft bearing. Common failure on this model. Mechanic confirmed that is the issue. If the bearing completely fails could leave the car stranded and cause more damage to other transmission components. No warning lights but noise is very loud.”