4.0 automatic

  1. SolarYellowshortbuss

    PCM failure?

    For the past forever ive been having issues with my wrangler from it saying I dont have a fuse, the oil pressure gauge going up and down, to the wrangler starting up very quickly one day to nothing but cranking a few days later. I took it to a fella who ran the codes for me and he says the brain...
  2. Droosk05LJ

    05-06 TJ/LJ 42RLE HP Tuners modified shift schedule

    As a person who has lived with this crap stock schedule 12+ years, finally finding a way to change it and have that change be everything I hoped for is one of the more cathartic releases I've had in quite some time. I am not a tuner so I have no other solutions for any other engine things. Do...
  3. rawzconn

    SOLD 1997 Sahara Pristine Condition

    Hello all! My name is Ross. I’m not a scammer. I bought a very nice TJ last year for my wife. I have to sell for personal reasons. 1997 Jeep Wrangler Sahara 4.0L Garage kept and covered. This TJ is in pristine shape! No dents or chips on the Stone White original paint. 36,000 original...
  4. OriginalGOB

    2005 Wrangler LJ Rough Idle No Power

    I have a 2005 Wrangler LJ with the 4.0. I have been getting a CEL for P0300, P0303, P0304 and P0431 randomly. Each time I reset the codes they randomly come back. I wasn't really worried because it was running fine. It started to have a slightly irregular idle so I replaced the spark plugs with...
  5. J

    Do I need an alignment?

    I have an 01 Jeep Wrangler with a 2” lift sitting on 32 MT tires. I feel it pull to the left/right driving highway speeds or driving over any bumps/cracks on the roads will make it swing either to the left or right. Les Schwab said its fine but i don’t believe them. You gotta white knuckle it...
  6. catbones2010

    Transmission gear search: PCM or something else?

    Hey guys! So my 2006 Jeep Wrangler for a couple months from time to time will have this weird issue where if I leave the O/D on with 33" itll do fine but at some point will feel like it revs up, then down, up then down.. like its looking for the right gear to pop into. I know I should have O/D...
  7. IsaacLeier

    32RH automatic transmission wont shift past 1st gear

    Good Day! I am a new to the Jeep community and off-roading as a whole. I took my 1997 4.0 Sport TJ mudding a few times this summer threw some deep holes with great success. However this last time I went the mud was super sticky almost like clay. Got stuck in the 1st hole of the day, mud was up...
  8. Jakedjq

    SOLD 2002 TJ Sahara 4.0 - $10,499 - 183K Miles

    4.0 engine Automatic transmission A/C works just fine 182K+ miles Clean Title $10,499 OBO I've owned this jeep for 17 years and she still runs great. Recently I've had the transmission rebuilt, new control arms and new shocks. This jeep is stock and has been since I've owned it. Within the last...
  9. K

    Help diagnosing noises in 4WD

    As the title says, this occurs in 4H. I also have a little bit of a “rattle” sound in 2wd that seemed to happen at the same time. Here’s a video of what I’m hearing in 4H. I have changed the Tcase fluid. Did the diff fluid and diff seals prior to this noise. 1997 tj, 4.0 auto.
  10. SamBone02X

    Banging, clunking, and creaking noise coming from suspension

    I have an 02 TJ with a 4” rough country lift that has never given me any issue whatsoever. Well recently I’ve noticed this horrible bang/clunk that feels like It’s coming from right under the center console area and it is quite loud when driving on a gravel road or a bump. I went hunting this...
  11. SamBone02X

    How do I test my IAC?

    I’ve been trying to chase down this weird low/rough idle issue for the past 2 months or so and I have checked everything else that could possibly cause this (except fuel pump) and everything checks out. Plugs look great, TPS has been replaced recently, IAC/TB has been cleaned several times (TB...
  12. SamBone02X

    Vibration at idle/ small muffler leak

    I’ve been chasing a somewhat rough idle issue for a month or so now, I first suspected the IAC I cleaned it several times it did not help, checked all plugs and they looked great, but today I was checking fluids doing some routine stuff and noticed my muffler dripping some water so I put my hand...
  13. Lax22

    SOLD Price drop, Auto 2003 TJ Wrangler X (Rust Free)

    My brother is selling his 2003 Moss Green TJ X. It’s a 4.0L 42rle auto trans, 128,000 miles, dana 30/35 with stock 3.73 gears and no 231 transfer case. We swapped a new frame onto this Jeep and refreshed a lot of parts in the process. The cooling system has been refreshed with a new radiator...
  14. G

    P0174 and P0171 Codes

    I recently replaced the PCM on my 2005 wrangler 4.0 auto, and that fixed the majority of the codes that it was throwing. It idles and drives fine, however, I am still getting recurring P0174 and P0171 codes. After reading some forum posts I took a look at the throttle body, and found that the...
  15. B

    SOLD 2005 Jeep Wrangler Unlimited LJ

    2005 Jeep Wrangler Unlimited (LJ) Inline 6 Jeep engine. 135k miles. Hard Top with rear defroster. Soft top frame included. Kargo Master Congo Cage with cross bars. Original Jeep wheels. Remote Start. New Spare tire, never used. JVC stereo with bluetooth. Clean title in hand. Located in...
  16. Hibi

    Automatic transmission engine overhaul

    Hey guys. Haven’t been getting any luck finding a decent tj automatic where I’m at. There’s one for sale that needs an engine overhaul. So desperate(ly in love) I just might get it anyway. I’ve no clue what to get and where to get it. Help?
  17. D

    2005 TJ Rubicon with random automatic transmission slipping

    Hi all! new to the forum and have a strange thing goin on with my 05 rubi auto trans. In early January I felt the Jeep slip going about 65 on the highway. The RPMs shot up but no power to the wheels. I let off the gas and I immediately felt re-engagement and I took off just fine and got home...
  18. O

    Mystery vibration

    Hey everyone, I’ve got an incredibly hard to find rubbing/grinding noise coming from my ‘02 TJ. My Jeep has been taken to 4 Jeep/off-road specialist who can’t pinpoint where it’s coming from even after looking at it for hours. They initially said it was the Transfer Case which I had rebuilt but...
  19. Russhibbitts

    TJ 4.0 engine knock

    View the attached file and see if anyone can determine what they think the knock may be. I have not heard it up close, only on the video. We just purchased it and want to get opinions. I think I know what it is but let’s see.
  20. wheelnmac

    2000 4.0 TJ misfire issues

    So here is the long version. I was on my way to the desert with my trailer in tow and the Jeep quit on a hill. Got it towed home and replaced the crankshaft position sensor. Nothing. Drained the fuel and replaced the pump. Bingo. Fast forward to last week. The jeep has been sitting. Starting it...