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Clutch question #2955564
08/20/21 06:44 AM
08/20/21 06:44 AM
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1970RT Offline OP
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I took my car (340/4 spd.) out for a drive yesterday (about 14 miles round trip). When returning home I got about a block from my house and when I let up the clutch pedal in first gear there was a slight grinding sound. I pushed the clutch pedal down and let it up again and there was no grind sound. I pulled in my driveway and was sitting still waiting for the garage door to open. Once opened, I let the pedal up to pull in the garage and heard the grinding sound again. Again I pushed the pedal down and let it up again and no grinding sound. I did this a couple more times and the results were the same, sometimes the grind sound but most of the time not. I'm not that knowledgeable when it comes to clutches so my question is, is this possibly some sort of adjustment issue or is the clutch going bad?

Re: Clutch question [Re: 1970RT] #2955571
08/20/21 07:23 AM
08/20/21 07:23 AM
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dragon slayer Offline
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If you are sure you are in gear fully, then something is not right and you need to at least drop the inspection cover and inspect.

Re: Clutch question [Re: 1970RT] #2955598
08/20/21 09:26 AM
08/20/21 09:26 AM
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80fbody Offline
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You can try adjusting first of course cause it's free. Based on my previous luck, it's usually time for syncros/sliders. Hopefully not in your case.

Re: Clutch question [Re: 80fbody] #2955600
08/20/21 09:27 AM
08/20/21 09:27 AM
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Rhinodart Offline
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So it happens when you are releasing the clutch? Sounds like it would be a throwout bearing...


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: Clutch question [Re: Rhinodart] #2955606
08/20/21 10:01 AM
08/20/21 10:01 AM
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Originally Posted by Rhinodart
So it happens when you are releasing the clutch? Sounds like it would be a throwout bearing...


Yes, when I release the clutch. But as I mentioned, it's not doing it every time, at least not yet. I need to take it for another drive and see if it makes the grinding sound when I put it in the other gears.

Re: Clutch question [Re: Rhinodart] #2955623
08/20/21 10:58 AM
08/20/21 10:58 AM
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Originally Posted by Rhinodart
So it happens when you are releasing the clutch? Sounds like it would be a throwout bearing...


A T/O bearing should do it whether it's in gear or not but it could also be just on the edge of failing IE: sometimes does or doesn't make noise.
1. In neutral, hold the clutch in for a minute or two and the slowly release it. if no noise proceed to the next steps.
2. Try 1st gear again, if the noise is present, proceed to step 3
3.Try reverse and or a second gear take off
NOTE: it may not be as noticeable during gear changes as the clutch is typically released quicker and the car is moving

If it is only present when releasing the clutch in gear it could be the T/O bearing, a worn disc with the springs hitting the flywheel bolts, a loose flywheel or several other undesirable problems.

try the above and report back beer

Re: Clutch question [Re: TJP] #2955662
08/20/21 12:58 PM
08/20/21 12:58 PM
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Originally Posted by TJP


A T/O bearing should do it whether it's in gear or not but it could also be just on the edge of failing IE: sometimes does or doesn't make noise.
1. In neutral, hold the clutch in for a minute or two and the slowly release it. if no noise proceed to the next steps.
2. Try 1st gear again, if the noise is present, proceed to step 3
3.Try reverse and or a second gear take off
NOTE: it may not be as noticeable during gear changes as the clutch is typically released quicker and the car is moving

If it is only present when releasing the clutch in gear it could be the T/O bearing, a worn disc with the springs hitting the flywheel bolts, a loose flywheel or several other undesirable problems.

try the above and report back beer


I did what you suggested. Apparently. things have changed since the car cooled down overnight. I did step one and the first time I let the clutch pedal up there was no noise. Each subsequent time I pushed it down and let it up the grinding sound was there. I proceeded to step two and it makes the grinding sound when I try all the gears including reverse and now the transmission will not go into any gear. It would still go into all the gears last night while it was hot.

Re: Clutch question [Re: 1970RT] #2955767
08/20/21 06:04 PM
08/20/21 06:04 PM
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madscientist Offline
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Pilot bushing/bearing. That’s what makes that noise.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Clutch question [Re: 1970RT] #2955806
08/20/21 09:07 PM
08/20/21 09:07 PM
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You can drop the inspection cover for a looksee, but it sounds like it's time to pull the trans & clutch to identify what's going on frown Keep us posted beer

Re: Clutch question [Re: 1970RT] #2955862
08/20/21 11:42 PM
08/20/21 11:42 PM
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Originally Posted by 1970RT
Originally Posted by Rhinodart
So it happens when you are releasing the clutch? Sounds like it would be a throwout bearing...


Yes, when I release the clutch. But as I mentioned, it's not doing it every time, at least not yet. I need to take it for another drive and see if it makes the grinding sound when I put it in the other gears.


Is it ONLY a Noise you're hearing? Or can you FEEL (via your foot) any "ruffness" when you depress pedal with engine running.

Re: Clutch question [Re: 1970RT] #2955950
08/21/21 11:59 AM
08/21/21 11:59 AM
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I did what you suggested. Apparently. things have changed since the car cooled down overnight.
Quote
I did step one and the first time I let the clutch pedal up there was no noise. Each subsequent time I pushed it down and let it up the grinding sound was there.

Was the above done with the car in neutral or a gear position ?

Quote
I proceeded to step two and it makes the grinding sound when I try all the gears including reverse and now the transmission will not go into any gear.

The above would indicate that the clutch is not disengaging or the synchonizers are not stopping the gears. This can be caused by the temperatures, wrong fluid or worn syncho's

Quote
It would still go into all the gears last night while it was hot.

Was the grinding still present when hot?

your posting's are a bit confusing and It's difficult to establish if the grinding you refer to is Transmission or clutch related
frown

If the noise is happening in Neutral WITHOUT MOVING the shifter then it is likely clutch related.

If the noise is happening WHEN MOVING the shifter and the clutch depressed it could be either or

Silly question, has the fluid level been checked recently?
As previously mentioned it sounds like it time to pull the trans. and clutch frown

Re: Clutch question [Re: TJP] #2956718
08/23/21 07:33 PM
08/23/21 07:33 PM
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Harriman NY
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71GTX471 Offline
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Will it make the noise when not running,if so lube the front bearing retainer snout that the bearing yoke slides on?

Re: Clutch question [Re: 71GTX471] #2956777
08/23/21 10:16 PM
08/23/21 10:16 PM
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Dcuda69 Offline
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Input shaft bearing? Changes with temp because lube thins out?

Re: Clutch question [Re: PhillyRag] #2956825
08/24/21 07:29 AM
08/24/21 07:29 AM
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Originally Posted by PhillyRag
Is it ONLY a Noise you're hearing? Or can you FEEL (via your foot) any "ruffness" when you depress pedal with engine running.



I don't feel anything unusual with the pedal and the grinding sound is intermittent.

Re: Clutch question [Re: TJP] #2956826
08/24/21 07:35 AM
08/24/21 07:35 AM
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Originally Posted by TJP
I did what you suggested. Apparently. things have changed since the car cooled down overnight.
Quote
I did step one and the first time I let the clutch pedal up there was no noise. Each subsequent time I pushed it down and let it up the grinding sound was there.

Was the above done with the car in neutral or a gear position ? Both.

Quote
I proceeded to step two and it makes the grinding sound when I try all the gears including reverse and now the transmission will not go into any gear.

The above would indicate that the clutch is not disengaging or the synchonizers are not stopping the gears. This can be caused by the temperatures, wrong fluid or worn syncho's

Quote
It would still go into all the gears last night while it was hot.

Was the grinding still present when hot? It does it both when hot after the engine has been running a while and also as soon as I start it before it gets hot.

your posting's are a bit confusing and It's difficult to establish if the grinding you refer to is Transmission or clutch related
frown

If the noise is happening in Neutral WITHOUT MOVING the shifter then it is likely clutch related.

If the noise is happening WHEN MOVING the shifter and the clutch depressed it could be either or

Silly question, has the fluid level been checked recently? No.
As previously mentioned it sounds like it time to pull the trans. and clutch frown


Re: Clutch question [Re: 71GTX471] #2956827
08/24/21 07:37 AM
08/24/21 07:37 AM
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Originally Posted by 71GTX471
Will it make the noise when not running,if so lube the front bearing retainer snout that the bearing yoke slides on?


Yes, it does but not consistently.

Re: Clutch question [Re: 1970RT] #2956829
08/24/21 07:44 AM
08/24/21 07:44 AM
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I backed the car out of the garage yesterday and surprisingly it didn't make any grinding sound so I thought I would take it down the street and back. It now went in and out of all gears just fine and I didn't hear any noise. shruggy However, after I pulled it back in the garage there was a mild odor like that of something burning or overheating. I'm going to pull the trans./clutch as soon as I have time and find out what's going on.







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