Gearbox bearing noise.

[Phizinza]

Any idea how I can quite down a bearing noise in a Liberty/Legacy gearbox? It's a 1990 model. It makes the noise while driving or in nutral with the clutch out. So when you put the clutch in the noise stops. I assume it is a bearing holding the imput side gear shaft. Would good oil help? Or is it a tear down/replace job ?

 

It is a dual range box (seems I am from Aus) so maybe it also might be a bearing on the dual range shaft? It does it in both hi and lo.

 

Any help would be appritiated. Thank you.

[Setright]

Well, a good oil might be able to reduce the noise a little bit, but new bearings are the only proper cure.

 

I've been there, done that.

 

Drain the oil, if it's full of metal shavings, you'll need to start considering a rebuild. Main shaft bearings were a weak point on the 1990 models.

 

 

If you wanna try the oil thing, I would suggest either a thick mineral oil, like a straight 90W, OR a strong film synthetic like Valvoline Synpower. Perhaps the price will help you decided which to try first

[Phizinza]

I was just wondering... Could this sound be a Throwout bearing? It makes it only when the clutch is released (driving or in neutral)

How could I test if it's this bearing without taking the engine out?

[Setright]

If the noise goes away when you press the clutch pedal DOWN then it's the gearbox bearings.

 

99% certain.

 

 

Throwout bearings can sometimes rattle about and become more quiet as you press the pedal, but the noise they make rarely goes away completely since it will still be rotating when the pedal is all the way down.

[nipper]

I vote for a throwout bearing. The noise may not go away completly, but as heard from the driverseat it does.

This is a typical throwout bearing complaint.

When was the last time the clutch was replaced.

 

nipper

[Phizinza]

I don't know, I got the car from a wrecker. If I adjust the clutch lever as far to the "off" position would it stop if it was the thrust/throwout bearing?

[Skid542]

My bet is on the throwout bearing as well. And to answer your current ^^^ question. I don't think so. If your clutch is fully engaged then your clutch is fully engaged.

 

Not to highjack - Anybody have experience with letting one go for a long time? What ultimately fails and gets damaged in the process?

[nipper]

My bet is on the throwout bearing as well. And to answer your current ^^^ question. I don't think so. If your clutch is fully engaged then your clutch is fully engaged.

 

Not to highjack - Anybody have experience with letting one go for a long time? What ultimately fails and gets damaged in the process?

 

i dont know if it would have a catastrophic failure, but i would imagine if it would self destruct, possibly ruin the clutch fork, and all those little metal peices in the bell housing. May also damage the "fingers" on the pressure plate.

 

And of course you know these things never fail at a good time.

 

nipper

[Phizinza]

My bet is on the throwout bearing as well. And to answer your current ^^^ question. I don't think so. If your clutch is fully engaged then your clutch is fully engaged.

I was thinking more along the lines of fully disengaging the clutch. So the pedel doesn't push it at all. Obviouslly the throwout bearing is pushing on the fingers a little bit (other wise it wouldn't be making the noise right? Because it wouldn't be spinning.)

I thought it might be a throwout bearing because it sounds like a dry bearing noise, not a oily damaged bearing.

I'll have a look at it again today (it's only a project car so it doesn't get much attention.)