21,567 Chevrolet Sonic 2012 model year compacts equipped with a six - speed automatic transmission and a 1.8 - liter four - cylinder engine for a condition in which
the transmission turbine shaft may fracture as a result of a supplier quality issue.
The 4L70 - E four - speed automatic
transmission features five - pinion gearsets, heat - treated stator
shaft splines, induction - hardened
turbine shaft, seven - plate clutch and specific valve - body calibration.