Ive got a 2004 overland just paid it off and what do ya know Ive got a transmission issue popping up. The thing seems to be slipping at high rpm you cant really feel it to hard but you can see it in the rpms it is getting worse.and its bumping harder and harder. Its a full time 4wd transmission. Im thinking its a clutch solenoid but Im no expert on transmission stuff. any other thoughts that I cant test would be helpful. I have a book on this truck but I don't know the transmission type can anyone tell me?

thanks