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[C2] Bang and Crunch Sound

 
Old 06-30-2019, 08:20 AM
  #21  
MikeM
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One things for sure. You can't just look at it and fix it. Do something.
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Old 06-30-2019, 10:55 AM
  #22  
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Originally Posted by 59BlueSilver View Post
We pushed the car into my shop, tranny in neutral, no resistance at all and no noise. Would that indicate the rear end is okay?
Get the rear wheels off the ground, push the clutch in and rotate the rear wheels while trying each gear and report back. Neutral isolates the input shaft and I think that is where your problem lies. Using the clutch to isolate the drivetrain includes the tranny input shaft in the test. My bet is you hear the grinding in every gear.

Last edited by Factoid; 06-30-2019 at 10:56 AM.
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Old 06-30-2019, 10:58 AM
  #23  
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Originally Posted by MikeM View Post
One things for sure. You can't just look at it and fix it. Do something.
I will, when I get a chance. Iím entertaining my grandkids right now. Hopefully late this afternoon.
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Old 06-30-2019, 04:32 PM
  #24  
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Just don't do it too long, as the output shaft yoke is what keeps gear lube from leaking out the back of the trans.
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Originally Posted by Kerrmudgeon View Post
Pull the drive shaft with it up on safety stands, start it up and run it through the gears to see if it's the trans or clutch, if it's ok then your know it's the rear end. That's what I would do.










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Old 06-30-2019, 04:57 PM
  #25  
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Originally Posted by ghostrider20 View Post
Does your clutch feel normal?

With engine running, trans in neutral, is the noise present?

Can you roll the car freely in neutral?

with engine of, can you shift through the gears normally?
YES to all those questions. What could it be?

The noise is only present when the engine is running and clutch is out, no noise when I push the clutch in. Everything looks fine for what I could see of the clutch.
Well, it’s definitely in the drive train and not something obvious or easy to fix, it looks like. I’ll have it towed to the shop tomorrow if I can get in. Any guesses what it might be so far? Sounds like the tranny to me.

Last edited by 59BlueSilver; 06-30-2019 at 06:21 PM.
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Old 06-30-2019, 06:16 PM
  #26  
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I vote for MikeM's advice, put it on Jack Stands and gently try the clutch and gears. If all is quiet while the rear tires are spinning in gear apply a little brakes and see if all hell breaks loose.
If one gear is quiet try all the others, 1st, 2nd, 3rd, 4th and reverse. You should be able to easily stall your engine using the brakes without hurting any of your driveline. If you hear odd noises track them down.
They are either in the front or the back and will show up as you test.
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Old 07-01-2019, 10:12 AM
  #27  
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Originally Posted by Westlotorn View Post
I vote for MikeM's advice, put it on Jack Stands and gently try the clutch and gears. If all is quiet while the rear tires are spinning in gear apply a little brakes and see if all hell breaks loose.
If one gear is quiet try all the others, 1st, 2nd, 3rd, 4th and reverse. You should be able to easily stall your engine using the brakes without hurting any of your driveline. If you hear odd noises track them down.
They are either in the front or the back and will show up as you test.
If you put it on jack stands, I would make sure to not let the rear end hang with the half shafts at an extreme angle if I was going to run it through the gears.
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Old 07-01-2019, 10:41 AM
  #28  
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Originally Posted by vettsplit 63 View Post
If you put it on jack stands, I would make sure to not let the rear end hang with the half shafts at an extreme angle if I was going to run it through the gears.

Yeah, if you don't have the right shocks on the car, not really a good idea if the shafts bind up.
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Old 07-01-2019, 01:30 PM
  #29  
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Does it make noise with the car in neutral and the engine running? Clutch in, clutch out, but in neutral?
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Old 07-01-2019, 06:41 PM
  #30  
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He says it is making noise in neutral with the engine running If that's the case, get the front up on jack stands. Start it up and with a hose or mechanic's stethascope, you ought to be able to hone right in on the source of the noise. The noise can't be coming from the rear if the car is not moving.
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Old 07-01-2019, 11:22 PM
  #31  
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I’m not going to take a chance on further damage by running it thru the gears, like taking out a cluster. The clutch feels very normal to me so I’m almost sure it’s the tranny. I’ve got it loaded on my trailer and taking it in tomorrow then we’ll know. BTW, when I was wenching it into the trailer, I didn’t hear any grinding or strange sounds.
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Old 07-02-2019, 02:20 AM
  #32  
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It is your transmission.
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Old 07-02-2019, 09:22 AM
  #33  
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Originally Posted by 59BlueSilver View Post
Iím not going to take a chance on further damage by running it thru the gears, like taking out a cluster. The clutch feels very normal to me so Iím almost sure itís the tranny. Iíve got it loaded on my trailer and taking it in tomorrow then weíll know. BTW, when I was wenching it into the trailer, I didnít hear any grinding or strange sounds.
The damage is already done, my friend. It didnít make any noise because neutral isolates the tranny input shaft and that is where your damage lies.
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Old 07-02-2019, 10:55 AM
  #34  
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Originally Posted by 59BlueSilver View Post
Iíve removed and installed the T10 in my 59. Is removing and installing a Muncie in a 65 less effort, equal to, or more difficult?
More difficult because you're now older.
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Old 07-02-2019, 11:05 AM
  #35  
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Originally Posted by ejboyd5 View Post
More difficult because you're now older.
No kidding. Like all of us, when I was younger, I could lay on my back and press a Muncie up and wiggle it into position while keeping it from binding on the clutch disc. That is what they make transmission jacks for nowadays. Man that is hard to accept.
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Old 07-02-2019, 03:30 PM
  #36  
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Originally Posted by 59BlueSilver View Post
Iím not going to take a chance on further damage by running it thru the gears, like taking out a cluster. The clutch feels very normal to me so Iím almost sure itís the tranny. Iíve got it loaded on my trailer and taking it in tomorrow then weíll know. BTW, when I was wenching it into the trailer, I didnít hear any grinding or strange sounds.
If it is the input bearing, the cluster is probably already gone.
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Old 07-02-2019, 05:27 PM
  #37  
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Originally Posted by Dan Hampton View Post
If it is the input bearing, the cluster is probably already gone.
Yep but even if it isn't one of the reduction gears can take a cluster out.
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Old 07-02-2019, 11:32 PM
  #38  
59BlueSilver
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I took it to a highly recommended transmission place today. He said with the holiday coming up we might not know till next week.
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Old 07-03-2019, 01:26 PM
  #39  
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Fortunately lots of good parts available now for rebuilding or upgrading an old Muncie.
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Old 07-03-2019, 01:29 PM
  #40  
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Originally Posted by 59BlueSilver View Post
I took it to a highly recommended transmission place today. He said with the holiday coming up we might not know till next week.
I wonder if they have any one who has every pulled an old C2/3 transmission before? If not it would probably be entertaining to hear them cursing Chevrolet for building a car with a fixed cross member.
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