Transmission Problem

Wait till the fluid settles then check the level (there is a little plastic howto stuck to the radiator crossbrace). Generally it's in park with the engine running, after you have shifted through all the gears.

I suspect your ATF fluid low and your neighbor of working at Midas. :)

Use the correct fluid as called out in your service book, or call the dealer.

Bobt,

First thing you need to do is change the fluid and filter as you do not indicate it has ever been done AND it should not be foamy.

Foamy fluid contains entrained air bubbles which will affect shifting.

The procedure is described at:

You can get the real stuff in Mopar or Valvoline brands. Valvoline brand ATF+4 is $3.69/qt at AutoZone. As far as I know those are the only 2 Jeep (DC) approved brands....

Let us know what happens after you change the fluid filter....

The connection on the throttle position sensor can be dirty. It controls the shift points on the 4.0 engine at least. it can be cleaned with a spray contact cleaner to fix strange shifting lots of times. WD40 can be used in a pinch.

Mike