I have a stock 2000 4Runner 4WD,3.4L engine, shift on the fly 4WD(not limited edition). My question relates to how many wheels are actually drive wheels when in 4WD. I know this sounds self explanatory when one mentions 4WD, but I need to ask the question. If I engage the 4WD....do all 4 wheels actually drive the vehicle? My previous car was a 2WD (non-4 WD) but only one wheel was actually driving the car when going forward, and the opposite wheel would drive when in reverse...so actually only one wheel was a drive wheel at a time. IS this the case with my 4Runner except its one rear wheel wheel and one front wheel that drive the vehicle when in 4WD...or do all 4 wheels drive the car at the same time? I was told by a Jeep salesman that 4WD really only engages 2 wheels at a time in the 4Runner as opposed to all 4 wheels in the AWD Jeep. would love to set him straight. Sincerely Bruce