My transmission started shifting through all 4 gears when I accelerate from a dead stop within 5-6 seconds of acceleration and the rpm stops at 20 and I'm still going 10 mph and no matter how hard i step on the gas the car slowly crawls up to speed.
Well as I was looking under the hood, I found this vacuum line (see pics).
The rubber elbow was connected to the small metal part circled in the picture, its hard to see but it is right next to the valve body.
Anyways, it was the only vacuum line that I saw that may possible be related to the transmission so I disconnected the rubber elbow part and slowly began to pull the line to trace it to the source and lo and behold it was disconnected from wherever the other end goes.
I traced it down somewhere past the oil filter, or somewhere in that area. Bad news is I have no idea if this is the source of the shifting problem or not.

Attached Thumbnails