Ok here's my problem...
I have a 95 Grand Cherokee with a 4.0 and an auto. Not full time 4x4 and it is date specific on the transmission. I had a guy from jeep tell me that there is a check valve in one of the lines going to the transmission cooler. If there is I can't find it. He says that if I remove it it will get rid of my tapping problem. If the truck is running it sounds like someone is tapping on a tin pot. It will go away with a push and then release of the gas but then comes back once you let off teh gas to like stop at a light.

Any hints???????

Any help would be great.
Thanks Shaun