Testing the Auto LSD feature of my 2016 SR5 V6 Auto 4x4 truck. The Auto LSD feature is actually the TRAC feature but without reduced engine power and works in 2WD mode only. The TRAC feature reduces wheel spin and simulates LSD in both 2WD and 4WD modes. The testing shows that the TRAC works on both axles, which was a surprise for me. Toyota should not hide these great features in the base model trucks.