There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2008 Kia Rio in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)TL* THE CONTACT OWNS A 2008 KIA RIO. WHILE DRIVING VARIOUS SPEEDS, THE ENGINE AND CLUTCH CEASED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO PROVIDED A COST ESTIMATE FOR THE REPAIRS. THE CONTACT REACHED OUT TO THE MANUFACTURER TO FIND OUT WHAT TYPE OF CLUTCH WAS NEEDED TO REPAIR THE VEHICLE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE DEALER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 103,000. THE VIN WAS UNKNOWN.
DURING ACCELERATION BETWEEN 50 AND 70 MPH THE AUTOMATIC TRANSMISSION STICKS TO 3RD GEAR AND THE VEHICLE SHUDDER OR SHAKES REAL HARD, THE KIA DEALER IS SAYING "NO PROBLEMS FOUND". THIS HAPPENS USUALLY ON THE FREEWAY WHEN MERGING ONTO TRAFFIC, ACCELERATING FROM 40 MPH TO THE SPEED LIMIT ON THE FREEWAY AND HAS CAUSED SEVERAL CLOSE CALLS. THE VEHICLE IS EQUIPPED WITH AN ELECTRONICALLY CONTROLLED AUTOMATIC TRANSAXLE THAT IS SUPPOSED TO DOWNSHIFT DURING HEAVY ACCELERATION THEN SHIFT BACK TO 4TH GEAR HOWEVER THE VEHICLE STAYS IN 3RD AND THE TACHOMETER GOES TO THE 6,000 RPM REDLINE. THE ONLY WAY TO FIX THE ISSUE IS TO LET OFF THE GAS AND ALLOW THE TRANSMISSION TO FIX IT SELF WHICH IS EXTREMELY DANGEROUS ON THE FREEWAY. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.