Vibration help.
Thread Starter
Joined: Jan 2003
Posts: 1,455
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From: Fort Worth, TX
Vibration help. Ok guys I'm having a very bad vibration under load(shaking the hell out of my car). I think it might be the converter. The converter acts like it's unlocking you give it a little gas at hwy. speeds and it automatically jumps up 1000rpm. My car also threw a couple of codes: Random Missfire, and Trans component slippage. Anyone have any ideas?
TECH Enthusiast
Joined: Nov 2001
Posts: 521
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From: Farmingdale NJ
The misfires will cause the converter to unlock. That can also set a slip code,especially if you have a big converter.
Fix the misfire and I bet your trans problems go away.
Fix the misfire and I bet your trans problems go away.
Last edited by Pete2k_Z28; Nov 24, 2003 at 09:52 PM.
Thread Starter
Joined: Jan 2003
Posts: 1,455
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From: Fort Worth, TX
Originally Posted by Pete2k_Z28
The misfires will cause the converter to unlock. That can also set a slip code,especially if you have a big converter.
Fix the misfire and I bet your trans problems go away.
Fix the misfire and I bet your trans problems go away.
What would cause the terrible vibration I'm getting just driving? It's got to be something driveline related because when it starts I can put in neutral and it doesnt do it, so it's not the suspension or tires. 
TECH Apprentice
Joined: Aug 2003
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From: Glenview, Illinois
Originally Posted by BAIN
I did see some posts about that and will check it out. Thanks What would cause the terrible vibration I'm getting just driving? It's got to be something driveline related because when it starts I can put in neutral and it doesnt do it, so it's not the suspension or tires.
What would cause the terrible vibration I'm getting just driving? It's got to be something driveline related because when it starts I can put in neutral and it doesnt do it, so it's not the suspension or tires. which i thought was due to the bent axle flange I overlooked when buying the car. 1 axle later vibration could still be felt. By the time I had time to swap out the trans (which was slipping and unlocking)I found a goodrich replacement with a 2800 tci converter I swapped it all out for a healthy 4l60 in stock form with converter, and a set of wires which cured pretty much all vibration woes for me. another thing to check If you have a stock torque arm check your pinion angle (you will need an angle finder ((most hardware stores cary them)), theres not much you can do to adjust a stock one however if the bushing is collapsed it will have affect on the angle=vibration, and another thing I have seen many things bent even on a stock car this includes torque arms, lcas, etc.
Thread Starter
Joined: Jan 2003
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From: Fort Worth, TX
Thanks for you input. I just took it to the tranny place and they said it felt like converter flutter(like going over little groves on the shoulder of the HWY). They are putting the stock one back in and see if it goes away.
I just took it to the tranny place and they said it felt like converter flutter(like going over little groves on the shoulder of the HWY). They are putting the stock one back in and see if it goes away. Trending Topics
FormerVendor
Joined: Feb 2002
Posts: 430
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From: Falkner, MS
Bain,
Give me a call at (662)224-9355. I will be in for a little while in the morning (Wednesday), but will be out Thursday and Friday for Thanksgiving.
Kevin
Give me a call at (662)224-9355. I will be in for a little while in the morning (Wednesday), but will be out Thursday and Friday for Thanksgiving.
Kevin
Originally Posted by BAIN
It was the converter 
Stock one is back in and driving just fine. Looks like I need to call Kevin at TCI.
Stock one is back in and driving just fine. Looks like I need to call Kevin at TCI.LS1 Tech Stories
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Verdad Gallardo TECH Apprentice
Joined: Aug 2003
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From: Glenview, Illinois
Originally Posted by BAIN
Will do Kevin, but it will have to be Monday because I'm going out of town for turkey day 
TECH Enthusiast
Joined: Nov 2001
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From: Farmingdale NJ
Wow I guess I would have lost that bet! 
You just made me realize something very important that I hadn't even considered before.
See, it can also work the other way.
This is how it works: the computer determines misfires based on unexpected deviations from the crank position sensor locations. Basicly, if the computer is expecting, say a 100ms delay between signals from the sensor, and it deviates slightly, it is counted as a misfire.
Since the converter was causing the chatter, it was having a slight effect on crankshaft position timing and the computer could not determine the exact cylinder that was the problem, since it was not a firing problem to begin with, and it set a random misfire code, assuming that all cylinders were misfiring for some reason.
In realty, it was a random chatter from the converter clutch apparently.
Hmm, interesting. I'll have to keep that in mind!
You just made me realize something very important that I hadn't even considered before.See, it can also work the other way.
This is how it works: the computer determines misfires based on unexpected deviations from the crank position sensor locations. Basicly, if the computer is expecting, say a 100ms delay between signals from the sensor, and it deviates slightly, it is counted as a misfire.
Since the converter was causing the chatter, it was having a slight effect on crankshaft position timing and the computer could not determine the exact cylinder that was the problem, since it was not a firing problem to begin with, and it set a random misfire code, assuming that all cylinders were misfiring for some reason.
In realty, it was a random chatter from the converter clutch apparently.
Hmm, interesting. I'll have to keep that in mind!
TECH Apprentice
Joined: Aug 2003
Posts: 313
Likes: 0
From: Glenview, Illinois
Originally Posted by Pete2k_Z28
Wow I guess I would have lost that bet! You just made me realize something very important that I hadn't even considered before.
See, it can also work the other way.
This is how it works: the computer determines misfires based on unexpected deviations from the crank position sensor locations. Basicly, if the computer is expecting, say a 100ms delay between signals from the sensor, and it deviates slightly, it is counted as a misfire.
Since the converter was causing the chatter, it was having a slight effect on crankshaft position timing and the computer could not determine the exact cylinder that was the problem, since it was not a firing problem to begin with, and it set a random misfire code, assuming that all cylinders were misfiring for some reason.
In realty, it was a random chatter from the converter clutch apparently.
Hmm, interesting. I'll have to keep that in mind!
You just made me realize something very important that I hadn't even considered before.See, it can also work the other way.
This is how it works: the computer determines misfires based on unexpected deviations from the crank position sensor locations. Basicly, if the computer is expecting, say a 100ms delay between signals from the sensor, and it deviates slightly, it is counted as a misfire.
Since the converter was causing the chatter, it was having a slight effect on crankshaft position timing and the computer could not determine the exact cylinder that was the problem, since it was not a firing problem to begin with, and it set a random misfire code, assuming that all cylinders were misfiring for some reason.
In realty, it was a random chatter from the converter clutch apparently.
Hmm, interesting. I'll have to keep that in mind!