Driveline noise - Not sparrows - I think...
Okay, I started getting a sound in the front-ish end of the TJ a few weeks ago. I have had NO wheeling for a while, but it just started making this noise. It sounds kind of like gears are not quite in sync.
In 2hi, 4hi, and 4lo, it makes the noise. it is not tied to engine speed, but rotational speed of the tires/driveshaft/transmission. I put the Jeep on jackstands in back and in 2hi, with only the rear wheels turning, no noise.
So I was pretty sure it is the front. I replaced diff fluid in front as I checked to see if I had blown the front end apart. They looked perfect actually. So I got to thinking either t-case or driveshaft. I did an adjustment on the t-case lever thinking perhaps the gears weren't quite in sync. Noise still there, but it shifts between the 4x4 modes better.
I even checked the t-case fluid level. It was fine.
I'm not sure if the is the 'angry sparrows' noise people complain about or what. I guess my next step is to put all 4 wheels in the air and get close while watching it (hard to isolate sound while driving).
A few weeks passed, and I finally looked at it again and closer inspection. After more listening, it really sounds like a t-case issue to me. With the doors off and a longer listen, it makes the noise in all drive modes, though the sound may change a bit. It almost seems like the adjustment fork that moves between 4hi, 4lo, and 2hi is not setting up in the right spot. But moving it a bit while in motion doesn't seem to change the sound any.
I thought it may be a driveshaft balance issue, but the sound is from further back.
I don't want to risk doing any damage to the t-case gear set, so I'm holding off driving it for now until I can get a better idea of what is going on in with it. I do have a SYE to install, so I may end up taking the t-case off, doing the SYE, and perhaps doing some maintenance on the t-case. I've never removed it, so that would be new too.
Anybody in the Huntsville, AL area that knows how to remove and work on a transfer case want to help me? I want to figure this out and do the work, but this is a new area for me.
Green Jeep Member #155
Low Output 4 Cylinder Jeep Member #35
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