So today I was picking up my girlfriend at her house. Now she lives on a bumpy road and I was having fun splashing around and hit a bump kinda hard and afterwards I started hearing a loud buzzing noise like metal vibrating. I just ignored this noise because my jeep makes that noise all the time with the heat shielding. Now after I picked her up me and another jeep buddy headed towards a new offroad spot. However once we got there, the notice turned into a loud grinding noise at around 25mph. I foolishly ignored it again... So we enter the offroad place and there's mud and water about as high as a foot and some areas up to the door line. Everything was okay until all of a sudden I hear this very loud grinding noise them the "hot oil" light came on with a p0218 code. Hot transmission oil. I shut the engine off and waited about 5 mins then turned her back on and turned back towards the exit. I ran into the same error and alarm about 6 times before getting out. Along the way out I heard grinding noises and what sounded like ungreased bolts turning (sorry it's hard to describe). After getting out the noise continued for about 5 miles then going away only to rest urn with a different noise (sounded like a ungreased merry go round). I checked the tranny oil, it's tannish. Any advice?