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[C2] Bang and Crunch Sound

 
Old 06-29-2019, 08:12 AM
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59BlueSilver
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Default Bang and Crunch Sound

Last night coming home from our local cruise in, I was accelerating, semi hard, in 2nd gear when there was a loud bang. I coasted into this parking lot but every time I let out the clutch, bad grinding sounds. A quick look under the car didnít find anything out of place, no leaks.
Sounded like it was coming from the rear end. Called the NCM roadside assistance number and they hooked me up with a tow company. It was 4.5 hours before they showed up, kept promising they would be there in 30 minutes! Not a good night! Anyway, the tow truck operator at least helped me get it into my shop. Drive shaft and half shafts are intact and it rolls good in neutral so I now think itís the transmission.
What do you all think?
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Old 06-29-2019, 08:55 AM
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Transmission most likely.
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Old 06-29-2019, 09:20 AM
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DansYellow66
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Yes, but also lesser possibility it could be in the clutch itself. Did you try it in 1st and reverse both?
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Old 06-29-2019, 09:36 AM
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Why guess? Jack up the back end and let the clutch out and peep under the car see what's not turning.
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Old 06-29-2019, 09:41 AM
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Originally Posted by DansYellow66 View Post
Yes, but also lesser possibility it could be in the clutch itself. Did you try it in 1st and reverse both?
No, but I will today.
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Old 06-29-2019, 09:44 AM
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Originally Posted by Factoid View Post
Transmission most likely.
I think so, too. 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?
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Old 06-29-2019, 09:49 AM
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There is a lot of detailed info in the archices on trans removal from a midyear. It's not easy as your '59. Do a search. Dennis
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Old 06-29-2019, 12:06 PM
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Something similar happened to me about ten years ago. I was gently shifting through the gears and heard a clunk/bang. I immediately slowed down and pulled over. Looked under the car but didn't see anything broken or leaking. I limped back home which I was able to do and was about three miles. Put it on the lift and pulled the diff. plug. I had a suspicion that it may have been coming from the rear end but wasn't sure. I Immediately saw the problem. There was a significant amount of metal flake in the oil. What had happened was the rear differential gears had fractured and fallen apart. I pulled the rear diff myself and took it to a differential specialist. We summarized that the diff had suffered from old age and decided to give up the ghost. The numbers on the main gear was from 1967. Well, 42 years wasn't bad.
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Old 06-29-2019, 12:16 PM
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Originally Posted by 59BlueSilver View Post
Last night coming home from our local cruise in, I was accelerating, semi hard, in 2nd gear when there was a loud bang. I coasted into this parking lot but every time I let out the clutch, bad grinding sounds. A quick look under the car didn’t find anything out of place, no leaks.
Sounded like it was coming from the rear end. Called the NCM roadside assistance number and they hooked me up with a tow company. It was 4.5 hours before they showed up, kept promising they would be there in 30 minutes! Not a good night! Anyway, the tow truck operator at least helped me get it into my shop. Drive shaft and half shafts are intact and it rolls good in neutral so I now think it’s the transmission.
What do you all think?
What do you all think? GREMLINS


Last edited by CorvetteMikeB; 06-29-2019 at 12:20 PM.
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Old 06-29-2019, 12:27 PM
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Originally Posted by CorvetteMikeB View Post
What do you all think? GREMLINS

You really need to think about, maybe, not posting if your have NOTHING pertinent to add to the conversation. Your posts 99% of the time are ridiculous...grow up!!

Last edited by leif.anderson93; 06-29-2019 at 12:32 PM.
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Old 06-29-2019, 12:41 PM
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Originally Posted by leif.anderson93 View Post
You really need to think about, maybe, not posting if your have NOTHING pertinent to add to the conversation. Your posts 99% of the time are ridiculous...grow up!!


You must be reading the wrong post. Only 25%of the time are ridiculous and not pertinent to the conversation. I'm too old to grow up a wither away........That's what Happens!!!
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Old 06-29-2019, 12:53 PM
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Originally Posted by Desert Nomad View Post
Something similar happened to me about ten years ago. I was gently shifting through the gears and heard a clunk/bang. I immediately slowed down and pulled over. Looked under the car but didn't see anything broken or leaking. I limped back home which I was able to do and was about three miles. Put it on the lift and pulled the diff. plug. I had a suspicion that it may have been coming from the rear end but wasn't sure. I Immediately saw the problem. There was a significant amount of metal flake in the oil. What had happened was the rear differential gears had fractured and fallen apart. I pulled the rear diff myself and took it to a differential specialist. We summarized that the diff had suffered from old age and decided to give up the ghost. The numbers on the main gear was from 1967. Well, 42 years wasn't bad.
Its a thought, but there was no way I could limp 10 ft. Without risking tearing something up from the sound it made.
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Old 06-29-2019, 01:36 PM
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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?
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Old 06-29-2019, 01:58 PM
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Dan Hampton
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My bet--if it isn't the clutch--is that you lost your front input bearing. If you did, your cluster gear may have bought the farm, as well. Better that than your rear diff.....

Last edited by Dan Hampton; 06-29-2019 at 01:58 PM.
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Old 06-29-2019, 02:12 PM
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Originally Posted by 59BlueSilver View Post
I think so, too. 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?
Mid years are more difficult than the early cars since they don't have removable tranny cross members. So there is more hassle factor actually getting the tranny out once it's unbolted. It's still very doable, just not as easy to answer your question. Give serious consideration to replacing the clutch if it's older or you have any doubts about it's condition since you are already going to be that far into it.
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Old 06-29-2019, 04:37 PM
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I would check the differential oil first. Then check the trans oil. Same thing happened to me almost 30 years ago in my '65 GTO and I was sure it was the Muncie trans. When I went to remove the driveshaft to pull the trans, the rear yoke on the diff moved a bit....and it turned out I had blown the rear end. The noise telegraphed up the driveshaft into the trans, like the body of a guitar. Totally fooled me, driving the car. Check the rear gear oil, with a magnet if you can. Rebuilding the trans or rear end is about the same $$$ depending on the damage. Neither are a cakewalk to R&R in a C2.
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Old 06-29-2019, 10:57 PM
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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?
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Old 06-29-2019, 11:46 PM
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Not necessarily.
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Old 06-30-2019, 01:55 AM
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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.










.

Last edited by Kerrmudgeon; 06-30-2019 at 01:56 AM.
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Old 06-30-2019, 08:04 AM
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Some people just like to Bitch, they need to grow up.
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