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Old 12-13-2019, 12:15 PM   #29
mikeinmobile
 
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Originally Posted by ABM Camaro View Post
Let me ax you a question. How exactly do you get mud IN to the tire?
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Old 12-13-2019, 06:06 PM   #30
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Ok, so Spec was mentioned twice in this post. Are we taking about a Spec clutch? If so that would explain the horrible vibration I had until my car was having issues under acceleration. My slave melted and one of the clutch disc was shattered.
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Old 12-13-2019, 06:14 PM   #31
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Try shutting off the stabiltrak and see if it still does it. My 2011 did it twice at he drag strip. Felt like death wobble.
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Old 12-13-2019, 07:23 PM   #32
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Originally Posted by Quicksilver 1LE View Post
Ok, so Spec was mentioned twice in this post. Are we taking about a Spec clutch? If so that would explain the horrible vibration I had until my car was having issues under acceleration. My slave melted and one of the clutch disc was shattered.

... my apologies for the confusion...
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Old 12-27-2019, 03:55 PM   #33
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Update: all brand new tires and rims. No fix. I can accelerate full throttle till 3rd gear no vibrations. Once I shift to 4 and up the vibrations are outrage. Even if I'm at 70 coasting, in 6th, I press the gas to go up a few mph and vibration is harsh. I doubt it's the drive shaft since i can run first gear to 6k rpms no vibrations
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Old 12-27-2019, 04:10 PM   #34
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Originally Posted by lift4dapump View Post
Update: all brand new tires and rims. No fix. I can accelerate full throttle till 3rd gear no vibrations. Once I shift to 4 and up the vibrations are outrage. Even if I'm at 70 coasting, in 6th, I press the gas to go up a few mph and vibration is harsh. I doubt it's the drive shaft since i can run first gear to 6k rpms no vibrations
How about if you prematurely shift to 4th gear? If your car is only shaking in those gears (4-6) regardless of speed then you may have some transmission problem

honestly you just need to get the car on a lift and check all your steering and suspension components. wheel bearings, control arms, etc. all sorts of things can cause vibration. could be that you got some cheap quality mounts installed since they were done around the time the vibration started. did you get OE?
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Old 12-27-2019, 04:12 PM   #35
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Does the vibration get worse as you apply power once you are at the speed the vibration occurs? Going the same mph, does the vibration have the same speed or intensity regardless of what gear you are in? Still sounds like driveshaft to me. Is there any play in the cv shafts? It's really hard to diagnose something like this without experiencing it first hand. It's not in the engine or clutch if its speed related and not rpm related. If the vibration stays the same regardless if you are in 4th 5th 6th and is more speed related you are looking at driveshaft, cv shafts, or possibly diff. Doubt it's the diff but you can put the car in neutral and see if you can move the pinion.
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Old 12-27-2019, 08:16 PM   #36
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Quote:
Originally Posted by lift4dapump View Post
Update: all brand new tires and rims. No fix. I can accelerate full throttle till 3rd gear no vibrations. Once I shift to 4 and up the vibrations are outrage. Even if I'm at 70 coasting, in 6th, I press the gas to go up a few mph and vibration is harsh. I doubt it's the drive shaft since i can run first gear to 6k rpms no vibrations
That is a big hint. Now if someone can answer the puzzle.


I can only think motor mounts. Back in the day I'd take a 2x4 and gently pry on the motor where there were no hoses or wires to damage and see if it would move 1/2 inch or more, up down left right.
Like 1/4inch and snug, lots of resistance to moving, is normal, but if it easily moves it's broken.


I had to replace a Civic motor mount recently that had a bad vibration only in reverse, reminds me of your puzzle. I used a floor jack and 2x4 under the engine to help identify the broken rubber mount.
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Old 12-27-2019, 08:53 PM   #37
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If the vibration starts at a certain speed and gets worse as speed increases no matter which gear, it is not going to be engine rpm related.
If it is vibrating at a speed even when coasting clutch in it will not be clutch or trans up to the output shaft.
If steering wheel shakes or vibrates it's front end. If seats and floor shakes it is rear.

I had vibration above 70 that had two conditions, increased with speed even with clutch in. And increase with magnitude when accelerating hard.

My findings where tire run out was excessive on rear tires as they rotated on the rims. Once I installed new the vibration went to higher speed but was still there. I found the front driveshaft bolts did not hold and had to replace my one piece driveshaft.
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Old 12-27-2019, 09:19 PM   #38
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I mean i already said it wasn't the tires or wheels. Two posts like this popped up at the same time. It's not engine mounts if its a severe vibration those might give a slight vibration but more of a hard clunk you would feel in lower gears which you said it feels fine under hard accell 1st and 2nd. It's beyond me why people come on here to ask questions then ignore the answers given. Replace the engine transmission driveshaft rear diff cv axles and hubs. That should fix it. Done with this thread.
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Old 12-27-2019, 10:12 PM   #39
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I mean i already said it wasn't the tires or wheels. Two posts like this popped up at the same time. It's not engine mounts if its a severe vibration those might give a slight vibration but more of a hard clunk you would feel in lower gears which you said it feels fine under hard accell 1st and 2nd. It's beyond me why people come on here to ask questions then ignore the answers given. Replace the engine transmission driveshaft rear diff cv axles and hubs. That should fix it. Done with this thread.
When the answers given are conflicting the same question needs to be asked again.
On this car the engine mount would not contribute to this type of vibration but the trans mount would. The shifting(movement) would change the driveshaft angle which will cause vibration. Easy problems have easy solutions. Hard problems require step through problem solving and testing.
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Old 12-27-2019, 11:17 PM   #40
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Maybe the first time you got your new tires the tire shop jacked up the car in the wrong place and bent something. And ever scene then the shakes started and the bent part needs to be found. Long shot but might be the root cause of the shake
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Old 12-28-2019, 09:47 AM   #41
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Speed related. No matter what gear, around 50mph+. I've checked all my cv and ball joints. No wiggle or tears in the boots. No movement in tire as far as the wheel bearings go. No obvious bends in undercarriage. I'll replace the new tires as a free check. Then move to the drive shaft.

Thank you everyone who took their time to share your experiences and thoughts. I'm so ready to have my car back up and good.
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Old 12-28-2019, 10:13 PM   #42
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Speed related rules out the engine and trans. Has to be driveline back. You said it cant be the driveline because you run the engine up to 6k but that's a nonsense statement. The engine and driveline dont run the same rpm. The driveline is directly related to the speed the car travels. Start looking there if you haven't. Look at your guibo joint.
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