I think until the 2nd gens they had gear or chain or something. I heard for the 5.0s they went to belt because of gears shattering or somethingi at 1000hp, but the belts apparently held up. I'm no engineer, but I do wonder about belt vs gear/chain longevity wise. Although I suppose if they save 20c per piece, thats lots of money over 2.7 sales. Maybe I will give the 2.7 a shot and look at it again. It felt smoother than the 2.3 and ran like a bat out of hell, especially for a Ranger. That said the 2.3 is no slouch either...