Novak Conversions Jeep Wrangler TJ radiator

The all too common "left turn pop sound"

Greg1987

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Jul 18, 2024
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Louisiana
I have a 2005 LJ. I have around 88k on the odometer. For 2 weeks I've been chasing a pop/clunk that sounds like it's coming from the front driver's side ONLY when making LEFT hand turns. It's very difficult to replicate when making right hand turns. It's extremely prevalent when making LEFT hand turns. Looking for some suggestions and creating this thread because for two weeks I've been scouring these threads trying to find "pop/clunk" threads that actually report back with resolution. There are very few. Most of the threads are just dead end unresolved. I do intend on coming back with resolution once the problem is solved.

Things I've checked.

*dry steer test makes 0 noise when preforming test everything checks out. This only happens while the vehicle is in motion and making a left turn.
*Track bar bolts and connections were the very next thing I checked.
*Sway bar links/bolts/bushings.
*Shock mount connections.
*Fixed the linkage on the transfer case.
*Checked every suspension component mentioned in every other thread to make sure they were not showing signs of wear or loose.
*Removed front drive shaft and ran without it.
*Jacked up front end and did the tests to see if it's a U-Joint or Ball-Joint. Everything seems to be in order there. For sure if it's this it's not loose enough to see with the naked eye. Or destroyed.
*Check Body mount locations for loose bolts
*Check torque on skid plate and tranny mount bolts
*I've even zip tied my phone to 4 different locations (front control arm driver side, front sway bar link driver side, skid plate near transfer case, frame near center of vehicle). Phone does not pick up the pop/clunk.

I do have the slightly clunky feeling in my steering that I believe is the Intermediate shafts. But that's been there since I bought it, and this noise is not that. It's different. I've inspected the shafts to make sure they haven't gotten worse. Nothing on them is that loose and it seems like it would make it both right and left turns.

Want to note that the pop or clunk is clearly felt in the steering and floorboard. Any tips would be greatly appreciated. I'm honestly about to drop it off at the local trusted 4x4 place and just open the checkbook. I promise I will report back once resolved so people in the future can have something to look into in the event, they run into something similar.
 
Another thing to check would be the unit bearings and especially where they mount on the knuckle. Its amazing how something just slightly loose and can't be seen by the naked eye can make a loud sound as it is resonated through all the components.
 
Try putting the driver's front tire on a ramp, and then doing the dry and running steering checks to see if the sound is there/you can see any movements. Up on a ramp may load it enough to simulate driving load. Also sight down the hood while moving the steering wheel... your sightline should move when the wheel moves, if it takes more wheel input to get the sightline to move, you'll have something loose, most likely the track bar...
 
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Can you share a recording of the sound it makes? Sounds similar to an issue I'm having that I also have not been successful diagnosing, and I've already replaced ball joints, axle u joints and the hubs. Here's what I'm dealing with, curious if it's similar to what you're hearing.

https://photos.app.goo.gl/CAn4Q8qwqwsuLEeV6

i'll have to try and figure out how to capture it on video after work. I still haven't been able to capture it from the outside. I've zip tied my phone several places under there lol. That was stressful.

I will tell you this though. It's a completely different sound than what's in your video.
 
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Ok guys, sorry for the radio silence over the weekend. I had to work all weekend and try and find time to poke around the LJ.

I have found a part that I believe is broken/worn out. It's the Tranny Mount. I basically just started shaking anything I could get a good grip on. When I grab my rear driveshaft and shake on it and ATTEMPT to move it around. I can clearly hear a rattle/clunk/metal rubbing sound coming from my tranny mount. I even laid on my back and pushed on the Driveshaft up with my foot and held my hand on the mount and it's for sure jacked up. I can actually feel that small straight bar that's in there moving around and creaking and making a metal on metal sound. Along with that, all those linkages under there are still pretty clunky and loose. Even after the rebuild kit I bought from Crown. I want to be clear that my driveshaft doesn't have play its all good. The movement and sound is coming from the tranny mount where the transfer case meets the tranny. What I am hoping is that worn out tranny mount is allowing my transfer case and tranny to move too much. Causing some clunking and the noises that I'm hearing when turning.

So, I ordered the cable linkage kit and a new tranny mount. Unfortunately, the Mopar one is discontinued, and I took a gamble on the one from amazon that a lot of people on here recommend.

I will report back when I get a chance to install these parts.
 
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Which people? Which brand mount? :unsure:

Sorry for being so vague. I just scoured what threads I could find dealing with tranny mounts and the general conclusion being that my choices are limited with the Mopar one being discontinued. I saw most people saying to stay away from any of the Polyurethane ones because they were reporting driveline vibes after installing the PU ones.

Which narrowed me down to Crown Automotive and the Anchor 2882.

I went with the Anchor 2882.
 
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Ok I can officially close the loop on this thread.

I changed the transmission mount. Good thing I did as it was in really bad shape. But it turned out to not be the noise.

I am quite embarrassed to admit this here among a lot of what seems to be well rounded mechanically inclined people. But I'm learning and I learned something valuable about my Jeep and an area that is now what I consider a maintenance item to check when I change the oil. Now I don't know for sure because I checked and torqued so many things this past weekend and went over so many things that I can't know for sure. But at some point, under the jeep, I pulled on the driver side rear lower control arm for leverage when I was tightening something in the rear, and I heard a clunk. Which was strange because I was sure I had already checked these. I had checked these, but I checked the mounting bolts. I didn't check the crush nuts on the adjustable control arms. It was loose. Sound is gone.


I really appreciate everyone's suggestions.
 
Ok I can officially close the loop on this thread.

I changed the transmission mount. Good thing I did as it was in really bad shape. But it turned out to not be the noise.

I am quite embarrassed to admit this here among a lot of what seems to be well rounded mechanically inclined people. But I'm learning and I learned something valuable about my Jeep and an area that is now what I consider a maintenance item to check when I change the oil. Now I don't know for sure because I checked and torqued so many things this past weekend and went over so many things that I can't know for sure. But at some point, under the jeep, I pulled on the driver side rear lower control arm for leverage when I was tightening something in the rear, and I heard a clunk. Which was strange because I was sure I had already checked these. I had checked these, but I checked the mounting bolts. I didn't check the crush nuts on the adjustable control arms. It was loose. Sound is gone.


I really appreciate everyone's suggestions.

Nice job!
 
Ok I can officially close the loop on this thread.

I changed the transmission mount. Good thing I did as it was in really bad shape. But it turned out to not be the noise.

I am quite embarrassed to admit this here among a lot of what seems to be well rounded mechanically inclined people. But I'm learning and I learned something valuable about my Jeep and an area that is now what I consider a maintenance item to check when I change the oil. Now I don't know for sure because I checked and torqued so many things this past weekend and went over so many things that I can't know for sure. But at some point, under the jeep, I pulled on the driver side rear lower control arm for leverage when I was tightening something in the rear, and I heard a clunk. Which was strange because I was sure I had already checked these. I had checked these, but I checked the mounting bolts. I didn't check the crush nuts on the adjustable control arms. It was loose. Sound is gone.


I really appreciate everyone's suggestions.

@AndyG will be along shortly to issue your punishment for not knowing everything on day one.

He'll probably make you say three Who Dats and eat a po boy or some crawfish etouffee.
 
Mine were torqued correctly too and would thunk anyways.

IMG20240313173405.jpg


-Mac
 
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@AndyG will be along shortly to issue your punishment for not knowing everything on day one.

He'll probably make you say three Who Dats and eat a po boy or some crawfish etouffee.

Yep, I’ll have to research the regulation book to mete out the punishment for the shame and humiliation of that.

Never mind, the shame and humiliation is the punishment.
 
I am quite embarrassed to admit this here among a lot of what seems to be well rounded mechanically inclined people. But I'm learning and I learned something valuable about my Jeep

I think a lot of us here started out this way. And if we didn't start out this way here, we started out this way somewhere else. Learn something every day, or else you're losing ground to the field.
 
Novak Conversions Jeep Wrangler TJ radiator