I bought my first Jeep about 3 months ago, a 2000 TJ 4.0 automatic. I’ve had no issues with it until a recent off-road trip when the transmission decided to stop shifting out of 2nd gear. I know very little about working on transmissions so I hope someone here can help. I’m not completely certain at what point the trans stopped shifting correctly but I do know it was after hitting a fairly deep mud hole which o got hung up in so I decided I would try to “rock” it out by shifting from drive to reverse and back several times. The Jeep did fine after that, from what I could tell, but we also were traveling at low speeds. When I got back out on to paved roads I noticed that when pulling out from a stop it wasn’t shifting down into 1st and when getting up to speed it wasn’t shifting into 3rd gear. I didn’t mess with it for a few days after because of frigid temps and busy with work and kids etc. A couple weeks later I was gonna take to a friends garage and drain the trans because it looked like there was water in the fluid. When I went to pull out from my house I noticed it went into 1st and getting up to speed it shifted into 3rd just fine as well but not even 3 mins into my drive and it was back to being stuck in 2nd gear again. At this point I don’t even know where to start. It’s not show any codes when checked with a scanner. Please someone help!
