420A Throw out bearing noise with clutch engaged

[1BadRS]

So i put a new clutch and throw out bearing into the car this weekend. The clutch is working great however with the pedal all the way up (clutch engaged) it makes this high pitched squeeling noise. Now if you lightly touch the clutch pedal the sound goes away and it also doesn't make any noise when you disengage the clutch pushing the pedal.

Is there anything I can do to make that noise go away or is it something I have to live with? I thought if I took the slack out of the pedal some how where its just putting a slight amount of pressure on the throw out bearing that would be great but I don't know if that would cause premature wear. I also thought of take out that rubber dust boot on the clutch fork and try and get some grease onto that bearing, but I don't know if that is even possible. Any thoughts would be appreciated.

 

[AWDphantomTSI]

I have the same problem with the wifes 97 nt...new throwout bearing and its bad...but the one on the car makes a coffe grinder noise when the clutch pedal is up. If i were you id just take the tranny off and get a dealer one thats what im doin. I have always used dealer ones but decided to take a chance with the one that came with the ebay clutch kit.
Ed

 

[DSMcrazy3]

Mine does the same thing.. When I pulled the transmission and re installed it I put alittle bit of grease on the TOB. That solved the problem, but since my transmission was still messed up the shop rebuilding it agree'd to pull it for me, and upon reinstallation they didn't re apply grease to the bearing, and the sound is back.

You're fine.

 

[1BadRS]

Thanks for the replies. I can't believe they don't pre grease the TOB, but oh well I'm not pulling that whole transmission back out. Fortunatly with the exhaust and radio going I don't hear it, and I don't have any drivability problems. At least i know for the next time.

 

[Talon ESI-T]

Most likely issue is that you dont have it on the fork correctly. There are little tabs on the TOB that hold it on to the clutch release fork. Those tabs break real easy and when you setting the tob and fork into the trans, the little tabs can come loose from the fork. Then you wil have the screeching squeeling sound your describing.

Terry

 

[DSMcrazy3]

Most likely issue is that you dont have it on the fork correctly. There are little tabs on the TOB that hold it on to the clutch release fork. Those tabs break real easy and when you setting the tob and fork into the trans, the little tabs can come loose from the fork. Then you wil have the screeching squeeling sound your describing.

Terry

When mine made the sound and I pulled the transmission the TOB was still mounted correctly and the tabs were fine. It's not a loud squealing though, it's very faint...

 

[99silvergs]

I had this problem too for years since i put on a new clutch and TOB that came with the clutch. It is making a lot of noise now since its cold out now. My question is if I put a TOB from the dealer on, will it still make this noise? For the people who never changed their clutch and TOB, do you guys have this problem too?

 

[DSMcrazy3]

I have a factory TOB on my car. My belief is that the problem exists due to a lack of grease on the bearing.

 

[thricestrat]

Make sure your fork is not bent before reinstalling new TOB. Even slight bend to the fork and that TOB can fail almost instantly. My advice is replace the for if your going to replace the TOB and also replace the pivot ball the fork rides on. I also replaced my input shaft seal everytime i did mine. < this is the shaft sticking out of the bell-housing that the TOB rides on. OEM TOB + GREASE should be the only way to do it!

 

[JFZERO ECLIPSE]

Where exactly would you put grease at on the tob???

 

[turbosax2]

Where exactly would you put grease at on the tob???

Here you go.

 

[silver bullit]

Here you go.

What type of grease would you recommend them if they got it from advanced or autozone?

 

[turbosax2]

What type of grease would you recommend them if they got it from advanced or autozone?

I use Valvoline Multi-Purpose Grease, but I guess any type of grease would work.

 

[thricestrat]

I always use ball bearing grease. Not the red kind you can find everywhere but the black kind for higher rpm applications. This always seemed to stay on alot longer rather than burning up and dripping off. Everytime i did a TOB i would pop off the rubber boot to the fork and inspect the grease to see how its holding up

 

[rowlex]

my NT has been doing this for over 30K miles. still running fine

 

[MidnightTSI]

My car just started doing this. Can I just pull the boot and grease it up? Or has the TOB already failed and it will keep making the noise until I change it out?

 

[Cesar]

if it the noise stops when the clutch is disengaged, then it shouldn't be the TOB.
The TOB is loaded when you depress the clutch pedal.

maybe one of the bearings in the tranny, ie input shaft bearings.

 

[viprez586]

if it the noise stops when the clutch is disengaged, then it shouldn't be the TOB.
The TOB is loaded when you depress the clutch pedal.

maybe one of the bearings in the tranny, ie input shaft bearings.

Everything of what he describes points towards the TOB.
Lack of grease will give you vibration which in effect equals noise. Main purpose of why lubrication is necessary.

Input shaft bearing will give you noise while in all gears.

 

[Cesar]

when power is being transmitted through the transmission via the input shaft and out the output shaft, the bearings in the transmission are loaded. If they are worn, they probably will make noise. while this is happening, the TOB is not loaded.

when you press the clutch pedal to the floor, you load the tob with the fork and you apply pressure on the crankshafts thrust bearings.

 

[draculia]

Input shaft bearing will give you noise while in all gears.

Perhaps this tranny design is different, but that's not true for all. E30 BMWs are notorious for noisy input shaft bearings with the clutch pedal up in neutral, goes away with the clutch pedal down or in gear. The input and output shaft bearings are ball, not needle, and the cage that holds them is made of some type of composite. Over the years the cage can crumble which causes the balls to hit against each other causing a nasty rattle that goes away while in gear or clutch pedal down.