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Throwout Bearing?

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Bandana View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bandana Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2017 at 7:25pm
 Well, crawling around under the car this afternoon and saw this.... the starter housing is cracked and if you look close you can see the bolts that hold it together had backed out.


Now I don't know if this is cause - or - effect from the grinding noise - or not related at all?? I could see the front edge of the flywheel teeth were a bit chewed up in a 2-3" stretch.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote mmaher94087 Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2017 at 8:00pm
To replace the starter motor is a heck of a lot easier than pulling the tranny. Begin with the starter motor then the tranny/clutch. You'll need to replace the starter anyway. I still think you have a T/O bearing/clutch problem.
Mike
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bandana Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2017 at 8:59pm
You're right that the starter definitely needs to be replaced. Just hope that there is not something in the clutch assembly that caused it to break? Damn thing runs over $200.
Before I found the starter problem I had started it up a few times without issue and rolled forward and backward in gear to try and get it to make the loud grinding noise. Took several tries before it did it and it was the same as over the weekend. As soon as the grinding noise started I pushed the clutch back in and it took a good 10 seconds for the grinding to stop. I also noted that I could vaguely hear (between the exhaust note and my bad hearing) a sound difference when the clutch was depressed and when it was out. May always have been there and I was just listening closely this time. It wasn't loud but it was there.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote mmaher94087 Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2017 at 9:46pm
"..the loud grinding noise.". That is what is bothering me. The noise you described is clutch related from your description, unless something from the starter fell into the bellhousing. The noise, as you described it, only happened when the clutch pedal was depressed and released (allowed to return to its normal position). If the noise was during the time that you depressed the pedal and released it; then I can only think of the T/O bearing. Please tell us what you discover.
Mike
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bandana Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2017 at 10:08pm
Will do but it may take some time to get it done. I'm not having any luck finding someone local to do the work so I may have to tackle it myself (would be a first for me!). I'm going to get a starter on order this week. Next week I am gone all week so it'll be another week before I can start on it. Man I wish I had a lift..... Unhappy
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bandana Quote  Post ReplyReply Direct Link To This Post Posted: Sep/15/2017 at 8:27pm
First step of this repair initiated. Powermaster is taking the starter back for rebuild. They will only charge parts and will do an autopsy to see how it failed. Fellow I spoke to thought the grinding noise may have been coming from the starter - more wishful thinking !! Hopefully I'll hear back from them by the time I get home next weekend..
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1970390amx Quote  Post ReplyReply Direct Link To This Post Posted: Sep/16/2017 at 1:17am
More often than not a throw out bearing will always make noise when you put your foot on the clutch. When you put the trans into gear and start to take your foot off the clutch you are bringing the input shaft to the same speed as the crank shaft. This causes a lot of stress on the pilot bushing. Said bushing is made out of oil impregnated brass. They dry out and wear severely and make terrible noise as you release the clutch.
1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box
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