Took the truck into the shop about a month ago to have trans flushed, refilled and bands adjusted. I just checked the level(in neutral) today when I did the oil change and it was about an inch over the full mark. plus when I was under the truck there is a little dab on the driver side pan bolts.
It doesn't leave a spot on the driveway but still. I am taking it back into the shop this week to have them redo their work. Does anyone think you can blow out seals with it being overfilled?

 

Make sure your truck is on a level surface when you check. The truck parked at a slight angle can make a big difference on the "perceived" fluid levels. (At least with my truck)

My truck does not fit in our garage. A way around this (If you have an inclined driveway and heavily crowned street like me) is to first get all the fluid levels correct on a perfectly flat surface, I used the warehouse at work. Next get a couple of wheel chocks and park where you normally do at home. Use paint to outline the position of the chocks after you have parked against them. Now check your fluids and use a metal scribe or dremel tool to park where they appear on sticks. Next time you can just place the chocks in their outlines, park, and then check whether your fluids are lower or higher than normal without having to seek out a flat place.

 

Temperature also plays a huge role in fluid level.

From the service manual for my '06:
Temp / level above BOTTOM of dipstick
80F / ~16mm
110F / ~28mm (crossing the M in min)
140F / 40mm (just at the lower edge of OK band)
170F / ~48mm (middle of OK)
200F / ~58mm (just above OK band)

HTH

Tony

 

Well, took the truck into the dealer today and the neutral safety switch seal was blown out. probably from being over filled the service manager said. anyway they took care of me, but that was after i had to coheres him a little.