Originally Posted by mtmnet

I took my 2006 4.4 in yesterday for an oil and filter change (Break-in period) at 1,600 miles and had them upgrade the transmission software.
(Invoice said: SIB240106-performed EGS)

The transmission shifts much better and no longer picks too high of a gear after slowing down to make turn.

I checked the oil level before I took it to the dealership and it was almost a quart low after only 1,600 miles. I guess they do burn some oil during the break-in period!