Throw Out Bearing? Please Help! - Ford Powerstroke Diesel Forum
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Old 08-05-2009, 03:52 PM
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Throw Out Bearing? Please Help!

I recently installed a new remanufactured ZF tranny. I bought the tranny from a local transmission shop, but installed it myself. Wishing I didn't now because I'm having a problem and looks like I'll be taking it out again. Also new LUK Flywheel, Clutch, Pressure plate, pilot bearing, and throw out bearing.

On short trips this problem doesn't occur only if I run the truck 20 miles or more and didn't start till about 1,000 miles after the tranny was in.

The problem is a squeak/grinding noise that is rotational and changes frequency with rpm. The only time it doesn't do it is when I push the clutch in.

I thought maybe pilot bearing, but if the engine is running no matter on clutch or gear the flywheel pilot bearing will always be turning around the input shaft.

I also thought throw out bearing, but I thought it just slides up and down the shaft and doesn't rotate.

Any suggestions please! What am I not seeing?
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Old 08-05-2009, 04:01 PM
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So I was thinking I guess the throw out bearing does rotate some because it rests against the pressure plate so probably it. What could I have done wrong though? Could it be possible the clutch fork? It looked fine, but there was a hook/spring deal though hooked on the fork to a stud/ball on the tranny. Could that be worn out?
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Old 08-05-2009, 04:11 PM
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does the noise go away if you just put a little pressure on the clutch or does it have to be completely disengaged to get the noise to go away?
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Old 08-05-2009, 04:41 PM
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Just a little pressure! This sounds promising you know what i'm talking about.
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Old 08-05-2009, 04:50 PM
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when it's making the noise crawl underneath and grab a hold of your clutch fork putting a little bit of pressure on it and see if it goes away. It sounds like either a throw out bearing or a clutch fork issue. it's hard to say without actually hearing it.
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Old 08-05-2009, 04:53 PM
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The clutch fork looks like it is vibrating/wobbling a little and if I put my hand on it slight pressure it goes away. Its a new throw out bearing though.
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Old 08-05-2009, 05:09 PM
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Well you know the noise is in there. The bad news is that your gonna have to take it apart to see what is failed. New parts do fail. It's a shame but it does happen.
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Old 08-05-2009, 05:20 PM
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they do fail did you grease it well before you put it in? i like to use antiseize on mine as it is a higher temp and clings alot better than regular grease just dont over do it and cause it to go everywhere and get on your clutch or bad things will happen it does sound like a throwout bearing to me but i am not 100% sure not being able to c it in person. where are you located at maybe someone can take a look at it for you from the site if you live near them??
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Old 08-05-2009, 05:21 PM
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Ok thanks a lot for the help. I'll probably take it out weekend after this and I'll let you know what I find. Ok if I private message you after i get it out if I have any problems? Suppose I need a new clutch fork would that be a dealer part? Are there any better throw out bearings than LUK? For so much pressure it seemed like an awful lot of plastic on that part.

Thanks again Dr. Forddiesel!
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Old 08-05-2009, 05:23 PM
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I did grease it with wheel bearing grease. I live 30 min. north of cincinnati, oh.
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