The Jeep Wrangler is a compact four-wheel drive sport utility vehicle (SUV) and an off-road vehicle manufactured by American automaker Chrysler, under its Jeep marque – and now in its fourth generation. It is a successor to the famous World War II 'Jeep' vehicle by way of the Willys civilian Jeep (CJ) in the 1950s, later produced by Kaiser-Jeep and by American Motors (AMC). The Wrangler debuted in 1987, was revised in 1997 and again in 2007. Wranglers continue to use live axles both front and rear as with their predecessor, the CJ.
Each Wrangler model has received a designation in addition to the nameplate Wrangler corresponding to their generation: YJ (1987–1995), TJ (1997–2006), LJ's (2004-2006 Unlimited models) and JK (2007–present). Military versions of the Wrangler have carried the J8 designation.
YJ models were manufactured between 1987 and 1992 in Brampton, Ontario, Canada, and subsequently at the Toledo South Assembly plant until mid-1995. TJ and LJ models were subsequently manufactured in Brampton, Ontario, as well. After that plant's razing, JK models have been at the Toledo North Assembly plant in Toledo, Ohio.
The Jeep YJ, sold as the Wrangler, replaced the much-loved but slower-selling Jeep CJ in 1987 and was built in Brampton, Ontario, Canada, until the plant closed on April 23, 1992. Production was then moved to Toledo, Ohio, using the same plant that produced the Willys Jeeps back in WWII. The American Motors Corporation (AMC) had designed the new jeep to be more comfortable on-road in an attempt to attract more daily drivers. It was a new design with a wider track, slightly less ground clearance, and more comfort. The YJ also had a leaf spring suspension similar to that of the CJ; however, the springs were wider, and the YJs sported trackbars and swaybars for improved handling. Despite the new grill, the body is very similar to the CJ7's, and it is interchangeable with some minor modifications. The YJ also was given a larger windshield over the CJ. The YJs are easily identifiable due to the rectangular headlights, disliked by some Jeep aficionados, and the fact that the wiper blades rest on the windshield giving this version a distinctive look. The blades rested on the windshield due to the now wider arc of the blades to clean the larger windshield. These two changes were later removed when the TJ changes came about in 1996. 632,231 YJs were built through model year 1995, although YJs were still produced into mid-1996, bringing the total production number to 685,071 units.
The YJ used a 2.5 L AMC 150 I4 or optional 4.2 L AMC 258 I6 until 1991. That year, a fuel injected 180 hp (134 kW) 4.0 L AMC 242 variant replaced the 112 hp (84 kW) 4.2 L 258 CID straight-6. The NP207 transfer case was used only in 1987 and replaced by the NP231
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