Progress or lack there of on my noise problem

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Romer

Romer

fatherofdaughterofromer
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So I got a CV Shaft from Christo and it had no impact on my noise.
I took the swaybar off because it seemed to start after I changed my bushings and that had no effect.

Again, my problem occurs on the highway when I take the foot of the gas. Its a grinding kind of un even sound like grrrrr pause grrrrgrrrr pause pause pause grrrrrrrrrrrrrrrrrrrrrrrrrrr.

After driving the highway, I have a nother noise on city streets. It sounds like a bearing needs oiling. A squeky type of whistle sound. If I drive it cold out of the garage on stay on city roads (40MPH and under) I don't hear the squeky whistle.

I took the drive shaft off, and its (sound) mostly gone, but I can still hear the grinding noise slightly on the highway and the squeky whistle is there when I get off.

It sounds like its coming from the front axle or diff as best I can tell.

Was wondering if it made sense to take the pinion flange off and at least look at the front bearing (page SA-62 FSM). Is it a big deal to take the carrier cover off and look at the rear bearing?

To summarize other things I have done:
I had the U joints replaced and the shaft rebalanced at a drive shop
I installed it per the FSM (90 deg out of phase)
I had cleaned out the spline
I am running med springs
I took the spacers out because it was really grinding bad with the spacers. At slower speeds and when I was just giving it little gas
I cleaned out the spline and greased by hand

I took the cover plate off the wheel hub and there is plenty of grease
The wheel Bearing is still tight.

I opened the zirc on the drive shaft and bled it out a bit.

I jacked the tire up and tried to see if there was movement on the axle bearings and I got no movement.

Any ideas? :confused:
 
On the diff cover, I should mention I have a locker which complicates it. I could still get to the front bearing if that made sense I guess.
 
Something to do with your belted crap .. water pumps etc? What about fan rubbing something? Engine mounts loose? Would that cause a vibration or something to rattle?


TY - 'oh look, a straw... :confused: '
 
LandCruiserPhil said:
Did you try removing the rear driveline and run the front driveline only?
Click to expand...

Since the problem goes away when you remove the front shaft, I am not sure how that would help?

Plus you can hear it coming from down low and up front. More to the right than the middle.
 
'K

So then, am I to understand that our noise is there with a stock front shaft and a CV shaft but absent with no shaft?
 
cruiserdan said:
'K

So then, am I to understand that our noise is there with a stock front shaft and a CV shaft but absent with no shaft?
Click to expand...


Its there with both shafts and the squeky whistle noise is there no matter what after I drive on the highway.

Without the shaft, I would say there is something there, but it is about 10% of the intensity of the original noise. If thats all I heard, I would have just ignored it.
 
'K

That is indicitive of something in the front diff/axle or the front output of the transfercase.

If memory serves, you had some work done on the rear transfer output some time back. Perhaps whatever caused the problem that affected the rear output also affected the front output?

D-
 
cruiserdan said:
'K

That is indicitive of something in the front diff/axle or the front output of the transfercase.

If memory serves, you had some work done on the rear transfer output some time back. Perhaps whatever caused the problem that affected the rear output also affected the front output?

D-
Click to expand...

Your memory is good. Actually, I swapped my Tcase for a used one that Christo had. He knew the history and said it was a good one. Thinking back running without the drive shaft trying to isolate that one, I think the squeaky bearing noise was there but real hard to hear.

Based on everything done so far and the history, I thinks it in the front axle, most likely the diff.
 
'K

Let's move on a bit then.


You say that the noise is still there, but greatly reduced, with the driveshaft removed.

I suggest that you pull the drive shaft and then pull the drive flanges. Place plastic bags or the like over the exposed hubs and then go for a quick jaunt to see if the noise is totally gone.

If so, the noise is in the diff, or the axle shafts, birfs, inner spindle bushings......

D-
 
Looking at the FSM SA-22 I need some guidance from some one who has done it. If I take off the Driveshaft, disconnect the wires from the locker and remove the Pinion flange, & the 10 bolts holding the diff carrier, can I take off the carrier and replace the front and rear bearings without having to take out the axles or disassemble anything relative to the actual gears?

If thats true, this might be a 2 bananna job.

Here is why I think that its one of these bearings:
1) The sound is almost gone without the pressure of a drive shaft.
2) When slowing, the drive shaft will exert the most pressure on these parts as it slows down.
3) The axle, birfield, etc is fairley simple and I would think a problem there would show up with or without the drive shaft.
4) I hear that squeaky bearing sound outside of both driver and pass windows.


So, I am trying to see if my thinking is right and if removing the cover to at least replace the front and rear bearings is fairly easy.
 
I am looking at the two bearings that are within the diff carrier goind between the drive pinion and the pinion plate. These are not located in the axle so to speak, just the diff carrier.

The Front end was rebuilt last Feb, so I don't think its any of those bearings.
 
The outer pinion bearing is the only one servicable "in-frame" and re-setting proper pre-load is problematic at best. In order to remove the inner pinion bearing the pinion shaft must be removed from the carrier, which of course requires the diif to be out on the work bench.

If it is indeed in the diff I suggest you pull it and go through it. If I were you I would pull it myself and take it to Robbie and ask him to call me when he was finished with it.

D-
 
Romer,

Can't help you with the GRRR...pause..GRR...but I had a similar loud whine/whistle that was driving me nuts..turns out it was the pinion bearing. When they took it out, it was badly scored. The noise went away after that. It took them a while to get the preload setup right, but said it wasn't too bad.
 
i have this exact same problem... I dont DD my rig anymore and the problem didnt get worse until i drove back and forth SLC to boise and back and by the time i was home the noise was super bad. Havent torn into it yet. Thinking back i had 4.88's put in.

Follow up with this and let me know what you end up doing. I am very interested. I think you did a better job of describing your problem than i did when started my thread but i know we have the same problem. here are the responses i got.

https://forum.ih8mud.com/showthread.php?t=6414

and i have no idea why everyone in that thread refers to me as mike. good luck. excited to hear the route you go without tearing down a front axle, R&P, Transfer case yada yada yada.
 
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