While my 06 DC is in the shop, the dealership gave me an 07 DC 4.7 4x4 for the next few days. The first thing I noticed was it seemed to have much more power than my 06. The power ratings did not change from 06 to 07, both trannys are 5 speeds, and both rear ends are 4:10. The 07 is heavier, so I can't figure out why it seems to have so much more power. Any ideas?