Had our Kia Sedona tuned up & serviced prior to a trip from Portland to Yosemite to hike. Leaving home the check engine light came on and went on and off for the tntire trip. Upon our return we were...
There can be a bad internal seal on a clutch pack that is preventing the clutches from building up the proper pressure. It won't be noticeable under normal driving, but it allows the clutches to slip and would lead to early failure.
I would definitely get it replaced under warranty. If you wait, it could end up costing you thousands when it finally does let go.