I like our 2.7. It weeps coolant and the coolant lines on the back of the block, exacerbated after hard towing in the summer. Hasn’t been bad enough to address. Mine had the dreaded shift issues leaving 3rd, but as mentioned before, 2oz of lubeguard (a very small dose) completely transformed the transmission. The driveline is my favorite.
I get no chain noise through 8-10,000 miles when using a 10-30 synthetic oil, usually penzoil platinum, and it doesn’t come out looking abused.
On top of that, the hellwig rear sway bar for $440 may be the best accessory added to the truck. It transforms it on the lightest setting.