It depends, if you plan on doing much offroading or possibly lifting your truck, I would go with the 2000 Explorer. The 2001 will have independent suspension all around, which, in the opinion of many, and more over fact, is less offroad capable. Also with independent suspension there is little to no likelihood of seeing a lift created for such a vehicle due to the compexity of independent suspension, let alone finding a company willing to make one for it. The 2001 Sports will however still have a solid rear axle, but this is the 2 dr model Explorer. Hope I helped.
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Tim Y.
1996 Explorer XLT
4.0L OHV 4x4