Yeah, I think that I have to replace the clutch kit in the transmission. I changed the fluid and replaced the filter, then added fluid to the transfer case, but still slipping. My neighbor is a mechanic and thinks the same thing, since when I removed the transmission pan, there was a lot of "grease" on the magnet, which I was told is the gripping residue from the clutch mechanisms between the gears. If I am wrong, or you think that it could be something else, please let me know. Thanks for your help.