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Ford Explorer 4th Generation

2006–2010 · U251 · suv

Fourth-gen U251 Explorer — last body-on-frame Explorer before the unibody U502 of 2011. Engines: 4.0L SOHC V6 (210hp), 4.6L 3-valve Modular V8 (292hp) added 2006. 6R60/6R80 6-speed automatic. 5-speed manual dropped entirely. EBV/Sport Trac and Mercury Mountaineer share the chassis. Stability control standard from 2007.

Watch out: Same 4.0L SOHC timing-chain cassette / tensioner failure as the third-gen Ranger — rear-mounted guides break and chains slap the case. $1,500-2,500 repair when caught early; engine replacement if it jumps timing. The 4.6 V8 doesn't have this problem but has its own intake-manifold-gasket coolant leak pattern around 100k.