Ref the 06 model...If it is truly an 2006 V-10, they made significant changes in that year....More hp/torque and a better transmission.....Earlier years were good but general consensus is that 06 and later were significant improvements...
Check the VIN for the year of the engine.....
Steve and Liz
Elko, Nv and San Diego, Ca
2017 Lance 1172
2016 F350 dually
2010 Jeep Wrangler