bbarker89 said:
stupid question i know but is there a diiference between awd and 4x4 other than the obvious you can put in 4x4 anytime?
Yes. 4x4, in it's basic form, is a solid mechanical connection to both the front and rear axles from the transmission. It can have a solid or near-solid connection to the wheels too with limited-slips and locker differentials. In the case of the TB, A4WD can be considered a wonky AWD, as it transmits some torque to the front wheels at all times and can adjust to put more toward the front, but this is NOT an efficient setup.
AWD hinges on full-time power flow to all wheels. There are several ways for the intermediate connection to go, generally a differential or something is used as the "transfer case." The big difference in the concepts of design is 4x4 is supposed to have equal power to all wheels at all times (barring slippage, but still will have 50% to front and 50% to back). AWD systems usually have advanced traction control, where power can be shifted to and from the front or rear axles, and sometimes get as specific as sending a considerable amount of power to a specific wheel.
The AWD system has properties which make it favorable for "all-weather" driving, as long as the weather isn't deep snow or anything. The advantage lies in full-time engagement to remove operator worry, advanced traction control (if available) to act pretty much like an "anti-ABS" system to maximize how much power actually hits the road, and the previously-mentioned all-weather setup. Rain's a pretty common scenario where AWD may enhance performance.
The 4x4 system (let's talk basic system), the expected 50/50 front/rear power ratio makes the system's handling characteristics predictable as soon as you familiarize yourself with its operation. The components can be manufactured in a more heavy-duty style which makes it favorable for towing applications or sporting. The ability to install locking differentials makes a difference, a low-tech way to distribute the power to more wheels in slip scenarios. The big bonus is having a multiple-stage transfer case (generally 4HI and 4LO), providing the engine with a much greater mechanical advantage over the terrain. In addition, the ability to turn the system off can improve gas mileage over a comparable AWD system.
In a modern-day scenario with a comparable 4x4 and AWD system, the 4x4 can get you more places, but the AWD can give you more grip on the common road. Since there's usually a lot of electronics and likely mechanical components involved with "torque vectoring," which is what controlling an AWD system at the tire level is called, so total cost of ownership may be higher (as there's more crap to dig through and possibly fix).