Question: what is the difference between all wheel drive and rear wheel drive?
Answer: Most 4WD vehicles tend to operate in RWD mode until four-wheel traction is required. ... Generally, a AWD system operates as a RWD or FWD vehicle– most are FWD. Buick's all-wheel drive preemptively sends power to both the front and rear wheels on every launch to prevent slip and loss of traction.