A big reason for the Bears' turnaround and success has been because of a resurgent defense.
After allowing five plays of at least 50 yards in their first five games, the Bears have not permitted any plays over 40 yards in their last four contests.
Promoting Chris Conte and Major Wright, reducing Brandon Meriweather's role and cutting Chris Harris is paying dividends, by staying disciplined and not allowing to get beat deep.
During their four-game winning streak, the Bears have yielded 65 points and generated 12 takeaways. In losing three of their previous four games, they gave up 110 points and produced just five takeaways.
Against the Lions, Julius Peppers demolished Calvin Johnson and forced a fumble that lead to a touchdown. This play set the tone of the game. Wright's and Charles Tillman's interceptions helped keep the game out of reach.
The run defense has cut its yardage total in half, allowing 282 yards during the four-game winning streak after permitting 568 yards in the previous four outings.
The pass defense has also improved dramatically, recording nine sacks and nine interceptions while allowing three touchdowns in the four wins after registering four sacks and three interceptions while permitting nine TDs in the previous four games.
The Rush Men have been dominant and are being disruptive. Peppers, quietly, has six sacks for the season. While he isn't among the league leaders, he does so much more in pressuring the quarterback into bad decisions and is strong against the run.