I'm out of town working in Tallahhassee Fl. My jeeps been acting funny cuttin out and bucking for little while. Figured it was a sensor. Yesterday it finally threw codes 12,37,and 11. I know the first two arent that important. So I disco'd the battery cable when I got to work and hooked it back up when I left. CEL off. Ran fine for a couple miles in town then started bucking and felt like the trans was slipping. Pull into a autozone. Go to back up and grinding noise fom under the jeep. Then it shuts off. Cranks right back up. Put it in reverse and it shuts off. Crank it, put it in reverse and rev it a little and make it into a parking space. Check trans fluid. Fine. Go in and buy a crank position sensor. Come out and lay under it to change and theres a small puddle of trans fluid. Coming out from around the bell housing. Never leaks anywere. I install the sensor re connect the battery and crank it up. Runs great. No sputtering or anything. Go down the road for about 2 miles and it doesn't want to shift into high. Then starts slipping. Then nothing in the trans. Just revs up in all positions. Pull over. I turn it off. Then crank it. Goes in gear for a few feet then revs again. Coast into hotel parking lot. Whinning noise coming from around the bell housing. What do you think it is? Torque converter? Trans? Help please!!!! 97 4.0 AUTO.