My oldest boy got a '15 Tacoma 4x4 a couple months ago with the TRD Off-Road package.

Includes: Bilstein shocks, electronically controlled rear differential, Active Traction Control (A-TRAC), Hill Start Assit Control (HAC) and Downhill Assit Control (DAC).

Personally, I think the TRD Off-Road package is not worth the $$. Better off getting an the aftermarket ICON suspension system instead.