So after a long trail ride without a single problem I pulled up to the highway to go home. I looked both ways to make sure the roadway was clear. I gave it gas and didn't move. I checked the shifter ( in drive and 2wd ). I got out and checked the tranny level. Bone dry. I checked under the rig. dry. No leaks. No holes in the pan. I limped it back to town in 4wd which got me moving. I got to a store and added new fluid. The transmission started working again but I noticed transmission fluid coming out near the transfer case. I turned it off and rode with a friend back to my town. The next morning I returned with a car trailer and brought her home. drove it off the trailer and parked it in the drive on concrete. Not one drop of fluid leaking. I checked the fluid level which was full. I went inside and started researching the problem. I found several people who said they added a transmission cooler. So today I went out and bought one. I drove the jeep to see if I could get it to leak again. Drove to the parts store which is 2 miles away at 35 mpr. Transmission seemed to work fine. At the store I let it idle while I was inside to let it heat up. Still no leaks. On the way home at the last stoplight the light was red. When it turned green I again had little to no forward gear. I put it in 4dw and got it home. This time I had no leaks and no loss of fluid. I went ahead and installed the cooler. When testing it for leaks I noticed I still did not have forward gear. Any ideas? Before the trail ride i checked all the fluids. 4.5 lift, 31's, . Before all this the thing shifted fine. No odd noises to be heard.

The cooler I installed. So i became curious after posting the thread above. So I just went for a drive. The transmission shift normaly now thats its stone cold. Im going to let it idle until warm to see if it develops the problem again

I'm assuming you were in 2wd while on the way TO the trail? How many miles is on your tranny?

150,000 miles. I was in 2wd leavivg. And yes I didn't drive to the trail in 4wd. Just used it when necessary. It was off when this happened.

Ok. I wasn't trying to say you drive it there in 4wd. Just verifying there were no issues driving there before you hit the trails.

No issues at all. shifted fine. I drove it this morning after it cooled off, shirts and works fine

Ok sweet. Hopefully the cooler was the fix and doesn't act up anymore.

No that's not going to fix it,