Squealing Transmission

[inkedrose]

Have a really bad metal on metal noise coming from my transmission. NV3550, 5 speed manual in a 2000, 4.0, 95k miles on motor. Motor was swapped at some point so who knows how many miles on tranny. Did a fluid change about 4k miles ago with MTL. Pulled drain plug and refilled, didn't pull filter. Drained it again when I heard this noise. Never smelt oil that burnt before, came out black as night. Over my head on this one so took it to transmission shop...waiting to hear results. Question is what would cause this? Been wheeling a lot lately but very much a noob. I'm in Colorado on rocky trails so speeds are usually pretty low. I leave it in 4 low, 3rd gear a lot and just let it crawl. Don't have to use brakes much going down hill, make the engine do the work. Would that be the cause of over heating and burning it up? Extended time in 4 low or using the engine to brake? Usually only run around 2500rmp. Want to make sure I don't do it again if that's the issue

 

[Kid Mechanic]

Didn’t hear anything unusual. Trans fluid will be black and somewhat smelly. No filter for manual.

If you think that is smelly, wait until you drain a differential.

 

[hear]

I don't hear anything bad in that clip either.

My experience with transmission shops is that you could bring them a new-off-the-lot transmission and they would tell you a rebuild is needed.

 

[Zorba]

Thanx to Chris for the thread name change - the original made my mind go where I didn't want it to go!

 

[RHanna]

To me it sounds like a piece of metal outside the transmission rattling against metal. I would check around the transfer case and the linkage on the front.

 

[inkedrose]

If you think that is smelly, wait until you drain a differential.

Did my differential already. This stunk up my garage for days

 

[inkedrose]

To me it sounds like a piece of metal outside the transmission rattling against metal. I would check around the transfer case and the linkage on the front.

awesome thanks. When it starts making the noise I can put my hand on the bell and feel it. If its not in it, its hitting it for sure

 

[Mobusaki]

Has there been any change in how it shifts or drives since hearing the noise? If not it's probably fine. IMO it's a noisy transmission. It's possible you have a small pebble or something up in there adding to the noise. It would be helpful to see a photo of the fluid. How long did you run the MTL before hearing the noise and changing the fluid again?

 

[inkedrose]

Has there been any change in how it shifts or drives since hearing the noise? If not it's probably fine. IMO it's a noisy transmission. It's possible you have a small pebble or something up in there adding to the noise. It would be helpful to see a photo of the fluid. How long did you run the MTL before hearing the noise and changing the fluid again?

Mechanic said it's the throw out bearing. Popped out of gear a couple times recently, didn't think much of it. Ran the fluid about 4k miles. New fluid reduced the noise but didn't eliminate it. Once I heard noise I stopped driving, luckily not my DD. Still surprised how fast the fluid went black in transmission. Is that normal?

 

[Smitty61416]

Just to revive the squealing tranny, mine doesn’t sound like the OPs, it actually sounds like squealing or the angry sparrows issue I had a couple years ago with the driveshaft. When I depress the clutch slightly it goes away. I understand from searching the forum that it’s prob the input shaft bearing that is making the noise. It’s not something I have the ability to fix so I just wanted to confirm that before I try and find a shop that will pull the transmission to fix it. I imagine it will cost a few hundred to do that work so I want to sound a little knowledgeable going into it.

 

[Smitty61416]

The other part of my question is whether its just an annoying noise or that I def need to address it? I'm sure it won't be cheap so I'm trying to figure out what kind of story I need to come up with for my wife if I actually do need to get it fixed.

 

[inkedrose]

The other part of my question is whether its just an annoying noise or that I def need to address it? I'm sure it won't be cheap so I'm trying to figure out what kind of story I need to come up with for my wife if I actually do need to get it fixed.

It ended up being a transmision bearing in mine as well as the clutch. Out of my skill set... labor was what killed me