question: What is the difference between 4WD, AWD and 4x4
comment: 4WD is Four wheel drive.. same as 4x4... It means you can select which mode you want in vehicle, usually reserved for trucks and Jeeps.. either have all four wheels powered or just two. AWD is all wheel drive, meaning the vehicle always has al four wheels engaged and you cant turn it off...usually reserved for cars and SUVs
passages: 4WD systems were developed in many different markets and used in many different vehicle platforms. There is no universally accepted set of terminology to describe the various architectures and functions. The terms used by various manufacturers often reflect marketing rather than engineering considerations or significant technical differences between systems. SAE International's standard J1952 recommends only the term All-Wheel-Drive with additional sub classifications which cover all types of AWD/4WD/4x4 systems found on production vehicles.
  
  Section::::Definitions.:4x4.
   Quadra-Trac II was introduced in 1999 and it employs a two-speed chain-driven transfer case featuring three modes of operation, "4-All Time", "N" or neutral, and "4-Lo". Two different transfer cases were used, the NV247 in 1999-2004 WJs and the NV245 in 2005-2010 WKs and 2006-2009 XKs.
   BULLET::::- 2016-present Jeep Compass (MP)
  
  BULLET::::- 2018-present Jeep Grand Commander
  
  Section::::Active Drive.:Active Drive II.
  
  Active Drive II includes all of the features of Active Drive I but adds a low gear range. When in "4-Low" mode the front and rear axles are locked together and power is sent to all four-wheels through a 2.92:1 gear reduction in the power transfer unit; providing a crawl ratio of 56:1 for four cylinder Jeep Cherokees and a 47.8:1 crawl ratio for six-cylinder Cherokees. All Cherokees with this system have a raised ride height of one inch.
  
  Applications:
  
  BULLET::::- 2014–present Jeep Cherokee (KL)
   BULLET::::- 2005–Present Jeep Wrangler Unlimited Rubicon (TJ,JK,JL)
  
  Section::::Selec-Trac.
  
  Section::::Selec-Trac.:Selec-Trac.
   Section::::History.:World War II — a leap in AWD proliferation.
   BULLET::::- Jeep Cherokee (XJ), Jeep Comanche, Jeep Grand Cherokee (ZJ), Jeep Liberty (Command-Trac)
  
  BULLET::::- Jeep Wrangler (Rubicon model has locking front and rear differentials)
  
  BULLET::::- Kia Sorento (some 2002-2009 models with 2WD/4HI/4LO - mostly LX)
  
  BULLET::::- Land Rover Series I, II & III (except V8 models)
  
  BULLET::::- Lincoln Mark LT
  
  BULLET::::- Mazda B-series
  
  BULLET::::- Mercedes-Benz G-Class
  
  BULLET::::- Mitsubishi Raider
  
  BULLET::::- Nissan Patrol
  
  BULLET::::- Nissan Terrano II
  
  BULLET::::- Nissan Armada, Pathfinder (All-mode 4WD) Auto-engages 4WD with slip
  
  BULLET::::- Nissan Titan, Xterra, Frontier (rear locker an option)
  
  BULLET::::- Subaru Loyale, GL/DL, BRAT Front/4wd/4wd lo, Justy 4WD
   BULLET::::- Dodge Power Wagon (a Ram version with front and rear differential locks)
  
  BULLET::::- Dodge Ram, Dakota
  
  BULLET::::- Dodge Nitro (Quadra-Trac 2)
  
  BULLET::::- Ford F series
  
  BULLET::::- Ford Explorer (1991-1994) & Sport Trac
  
  BULLET::::- Ford Ranger
  
  BULLET::::- Geo Tracker
   Section::::Longitudinal systems.:The Torsen type "C" (T3).
   Stomper 4x4s was the first official mini 4wd, created on February 14, 1980, by Adolph Eddy Goldfarb and sold by Schaper Toys. These toys were battery-powered vehicles that ran on a single AA battery and featured four-wheel drive. They were driven by a single motor that turned both axles. Of the first vehicles were a Ford Truck and a Chevrolet Truck.
  
  Section::::Generations (1982).
   Applications:
  
  BULLET::::- 1980-1982 Jeep Wagoneer and full-size pickups (SJ)
   All-wheel drive
  
  An all-wheel drive vehicle (AWD vehicle) is one with a powertrain capable of providing power to all its wheels, whether full-time or on-demand.
  
  The most common forms of all-wheel drive are:
  
  BULLET::::- 4×4 (also, four-wheel drive and 4WD): Reflecting two axles with both wheels on each capable of being powered.
  
  BULLET::::- 6×6 (also, six-wheel drive and 6WD): Reflecting three axles with both wheels on each capable of being powered.
  
  BULLET::::- 8×8 (also, eight-wheel drive and 8WD): Reflecting four axles with both wheels on each capable of being powered.
  
  Vehicles may be either part-time all-wheel drive or full-time:
   Section::::Uses.:In construction equipment.
  
  Volvo introduced the Model 646 four-wheel drive backhoe loader in 1977. Case Corporation followed suit in the U.S. in 1987.
  
  Section::::Terminology.
  
  In engineering terms, "four-wheel drive" designates a vehicle with power delivered to four wheel ends spread over at least two axles. The term "4×4" (pronounced "four by four") was in use to describe North American military four-wheel-drive vehicles as early as the 1940s, with the first number indicating the number of wheel ends on a vehicle and the second indicating the number of driven wheels.
   Applications:
  
  BULLET::::- 2008-2012 Jeep Liberty/Cherokee (KK)
  
  Section::::Quadra-Trac.
  
  The Quadra-Trac name is used on a variety of full-time 4WD systems. The first version used the Borg-Warner BW1339 transfer case and was produced from 1973 to 1979. The next version used the New Process NP219 transfer case and was produced from 1980 to 1982. From 1993 to 1995 the New Process NP249 transfer case carried the name. And from 1996 to 1998 the transfer case was manufactured by New Venture Gear with some minor improvements and it was renamed the NV249.
   Section::::Active Drive.:Active Drive Low.
  
  Active Drive Low includes all of the features of Active Drive I but denotes a greater possible crawl ratio. When in "4-Low" mode the front and rear axles are locked together and power is sent to all four-wheels through the power transfer unit although no low range gear reduction occurs. Active Drive low relies on shorter axle gear ratios while holding first gear in the ZF9HP transmission to achieve a crawl ratio of 20:1; similar in effect to Freedom Drive II.
  
  Applications:
  
  BULLET::::- 2015–present Jeep Renegade (BU)
  
  BULLET::::- 2018-present Jeep Compass (MP)
  
  Section::::Active Drive.:Active Drive Lock.
   Four wheel drive systems include Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II. Using Selec-Terrain, the driver can select modes for Auto, Sport, Snow, Sand/Mud, and Rock.
  
  Optional "Quadra-Lift" height adjustable air suspension can raise the vehicle's ground clearance up to . Lift modes include Park, Aero, Normal Ride Height, Off-Road 1, and Off-Road 2.
   Four wheel drive systems include Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II. Using Selec-Terrain, the driver can select modes for Auto, Sport, Snow, Sand/Mud, and Rock.
  
  Optional "Quadra-Lift" height adjustable air suspension can raise the vehicle's ground clearance up to . Lift modes include Park, Aero, Normal Ride Height, Off-Road 1, and Off-Road 2.
  
  Section::::Powertrain.
   BULLET::::- 4Matic - a four-wheel drive system from Mercedes-Benz
  
  BULLET::::- 4motion - a four-wheel drive system from Volkswagen
  
  BULLET::::- All-Trac - a four-wheel drive system from Toyota
  
  BULLET::::- Nissan Bluebird
  
  BULLET::::- Nissan Pulsar
  
  BULLET::::- Nissan Skyline
  
  BULLET::::- Nissan Skyline GT-R
  
  BULLET::::- Nissan GT-R
  
  BULLET::::- Quattro (four wheel drive system) - a four-wheel drive system from Audi
  
  BULLET::::- S-AWC - a torque vectoring four-wheel drive system from Mitsubishi Motors
  
  BULLET::::- SH-AWD - a four-wheel drive system from Honda
  
  BULLET::::- Symmetrical All Wheel Drive - the four wheel drive system from Subaru
  
  Section::::External links.
  
  BULLET::::- Car Information Database (Nissan)
   BULLET::::- BMW 3-series and X5 between 2001 and xDrive - planetary center differential with permanent 38-62 (front-back) torque split #
  
  BULLET::::- Cadillac Escalade, STS AWD, SRX AWD (The first two generations had a viscous clutch on the center differential) #
  
  BULLET::::- Chrysler 300C AWD#
  
  BULLET::::- Dodge Ramcharger 1974–1981 - NP203 FullTime 4WD Transfer Case
  
  BULLET::::- Dodge Magnum, Charger AWD #
  
  BULLET::::- GMC Yukon Denali, XL Denali, Sierra Denali #
  
  BULLET::::- Mercedes 4MATIC cars, R class, and ML class (note some MLs had low range) #
  
  BULLET::::- Plymouth Trail Duster 1974–1981 - NP203 FullTime 4WD Transfer Case
  
  BULLET::::- Toyota Highlander #
   BULLET::::- Range Rover 3rd Gen. 2002–2009
  
  BULLET::::- Toyota 4Runner (only Limited V8 model & 2010 Limited V6 model) Torsen T-3 with lock
  
  BULLET::::- Toyota FJ Cruiser (only manual models) Torsen T-3 with lock
  
  BULLET::::- Toyota Hilux Surf Torsen T-3 with lock
  
  BULLET::::- Toyota Land Cruiser 200/2008/V8 Torsen T-3 with lock
  
  BULLET::::- Toyota Sequoia (only 2005-07 Models)
  
  BULLET::::- Volkswagen Passenger Cars with 4motion:
  
  BULLET::::- Volkswagen Passat Torsen T-2 (B5.5 model, not latest B6 model with transverse engine)
  
  BULLET::::- Volkswagen Phaeton Torsen T-2
  
  Section::::Systems by design type.:Non-locking center differential.
   Section::::Definitions.:4WD.
  
  "Four-wheel drive (4WD)" refers to vehicles with two axles providing torque to four axle ends. In the North American market the term generally refers to a system that is optimized for off-road driving conditions. The term "4WD" is typically designated for vehicles equipped with a transfer case which switches between 2WD and 4WD operating modes, either manually or automatically.
  
  Section::::Definitions.:AWD.
   Y: 2 Wheel Vehicle 
  
  N: Roadster 
  
  G: Crossover 
  
  K: Commercial Van/Truck 
  
  M: Manual (drive unspecified) 
  
  N: Manual 4WD 
  
  C: Manual AWD 
  
  A: Auto (drive unspecified) 
  
  B: Auto 4WD 
  
  D: Auto AWD 
  
  Fuel / 
  
  R: Unspecified Fuel With Air 
  
  N: Unspecified Fuel Without Air 
  
  D: Diesel Air 
  
  Q: Diesel No Air 
  
  H: Hybrid Air 
  
  I: Hybrid No Air 
  
  E: Electric Air 
  
  C: Electric No Air 
  
  L: LPG/Compressed Gas Air 
  
  S: LPG/Compressed Gas No Air 
  
  A: Hydrogen Air 
   The term "IWD" can refer to a vehicle with any number of wheels. For example, the Mars rovers are 6-wheel IWD.
  
  Section::::Definitions.:SAE Recommended Practices.
  
  Per the SAE International standard J1952, AWD is the preferred term for all the systems described above. The standard subdivides AWD systems into three categories.
  
  Part-Time AWD systems require driver intervention to couple and decouple the secondary axle from the primarily driven axle and these systems do not have a center differential (or similar device). The definition notes that part-time systems may have a low range.
   BULLET::::- 2015 Toyota 4Runner TRD Pro
  
  BULLET::::- 2014 Range Rover Sport
  
  BULLET::::- 2013 Jeep Wrangler Moab
  
  BULLET::::- 2012 Jeep Wrangler Rubicon (3.6L V-6)
  
  BULLET::::- 2011 Land Rover LR4 HSE
  
  BULLET::::- 2010 Ford F-150 SVT Raptor (5.4L V-8)
  
  BULLET::::- 2009 Suzuki Equator Crew Cab RMZ-4
  
  BULLET::::- 2008 Toyota Land Cruiser
  
  BULLET::::- 2007 Jeep Wrangler Rubicon JK
  
  BULLET::::- 2006 Dodge Ram 1500 TRX4
  
  BULLET::::- 2005 Jeep Grand Cherokee (IFS)
  
  BULLET::::- 2004 Volkswagen Touareg V-8
  
  BULLET::::- 2003 Lexus GX 470
  
  BULLET::::- 2002 Jeep Grand Cherokee (4.7 HO V-8)
  
  BULLET::::- 2001 Jeep Grand Cherokee (5-speed auto transmission)
  
  BULLET::::- 2000 Toyota Tundra
   In 2008, Nissan introduced the GT-R featuring a rear-mounted transaxle. The AWD system requires two drive shafts, one main shaft from the engine to the transaxle and differential and a second drive shaft from the transaxle to the front wheels.
  
  Section::::Uses.
  
  Section::::Uses.:Road racing.
  
  Spyker is credited with building and racing the first ever four-wheel drive racing car, the "Spyker 60 HP" in 1903.
  
  Bugatti created a total of three four-wheel-drive racers, the Type 53, in 1932, but the cars were notorious for having poor handling.
   Other companies in the Volkswagen Group have used different trademarks for their 4WD vehicles. While Audi has always used the term "quattro", Volkswagen-branded cars initially used ""syncro"", but more recently, VW uses ""4motion"". Škoda simply uses the nomenclature ""4x4"" after the model name, whereas SEAT uses merely ""4"" (""4Drive"" more recently). None of the above trademarks or nomenclatures defines the operation or "type" of 4WD system, as detailed below.
  
  Section::::Longitudinal systems.
  
presuppositions: 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4.
corrections: 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive.
raw_presuppositions: 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4. 4WD is different from 4x4.
raw_corrections: 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive. 4WD is not different from 4x4 and both are Four wheel drive.