Will not shift out of third gear

2010 HYUNDAI SONATA
229,000 MILES • 2.4L • 4 CYL • FWD • AUTOMATIC
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JBALISE
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First let me state that this is the second transmission in the car. The original transmission blew at approximately 140,000 miles, due to a similar issue, but ran until 160,000 miles when we replaced it with a transmission that had 60,000 miles on it. Now with approximately 130,000 to 140,000 miles, my transmission was running rough, finally clicked that she was not leaving third gear. A transmission flush helped prolong the last one, but this one is not showing any loss of fluid and color is still good. I do not have a check engine light on (shocking considering her mileage). I really do not want to buy another transmission for her. Does anyone know how to fix this? I need her to last another six plus months and I do have to shift gears up to three hundred times per day (I deliver newspapers).
Aug 28, 2017 at 9:55 AM
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MHPAUTOS
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May have a failed shift valve solenoid, a live data read of the transmission should show this, there may also be a code set, not all codes set a MIL so do a check there as well.
Aug 28, 2017 at 11:13 PM