Trans Slip or something else?

[0merta]

Recently my rig has started showing sign of what I assume to be transmission slip (198k miles, 2000 3.3 Auto) but I'm not entirely sure what it is. Under 3/4 throttle its hesitating a little, like it wants to go faster but cant. It doesn't jolt forward but casually speds up and slows down, really sluggish. Also, from time to time when getting on the freeway, I'll go mid-full throttle to enter, and the RPM's will jump and fall back down right away before proceeding to speed with the car. Lastly, I've noticed a slight flare between 1-2 w/ no throttle (while driving through parking lot, for example). Questions I have are:

1) What should I start look at first? Fluid seems full and still pink/red. I'm new to 4x4 cars in general so is there something else in the driveline that could be causing an issue?

Thanks in advance!

[jyeager]

I understand you are experiencing symptoms seeming to be the transmission. But it does sound like the kind of thing that could happen due to a vacuum leak.

 

The first thing to look at was the trans fluid, which you did.

If this really is in the transmission, it will not be good.

 

But consider the vacuum leak possibility.

[0merta]

I'll check it out for a vacuum leak. Thanks.

 

Also ordering wires/plugs as I'm nearing 200k