One problem related to differential unit has been reported for the 2009 Toyota Tacoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Tacoma based on all problems reported for the 2009 Tacoma.
I have a 2009 Toyota Tacoma and when the vehicle is stopped for example at a red light the vehicle rpm will increase and the vehicle will then lurch forward. Fortunately my foot in on the brake. The vehicle also has a whining noise from the rear of the vehicle that has been identified by Toyota regional reps as a whining noise from the differential at 50 to 70 mph. Taken back 3 times to dealer they say its normal but I know it is not. These may be 2 sperate issues but it is clear that Toyota makes it difficult for is customers to get warranty reapirs and in acknowledging a problem. Toyota should be ashamed for its lack of customer service in fixing its vehicles until people get injured.