You should downshift an automatic transmission in low traction situations, especially when your transmission shifts through all gears, spinning the wheels though your vehicle isn’t moving.

"This unrequested transmission downshift would cause unexpected rapid vehicle deceleration. Certain consumer complaints additionally allege that the vehicle's rear wheels temporarily lock ...

More: Tesla, Ford, Lincoln among over 120,000 vehicles recalled: Check car recalls here Some complaints added that the vehicle's rear wheels would lock temporarily, seize or skid during the downshift, ...