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Jan 23rd, 2013
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Duramax "jerk" when stopping/accelerating #12711255
04/10/18 11:48 PM
04/10/18 11:48 PM
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Pearland, TX
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dk2429 Offline OP
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Truck is a 2006 2500HD with the LBZ Duramax.

I bought the truck at 178k, now at 193k. I did notice this when I test drove the truck, but didn't really think anything of it. When I get to a stop, I feel a jerk or clunk. Then when I get on the gas from a stop, I feel a clunk again. It's almost as if there might be slack in the driveshaft somewhere. Shifting into gear is fine, normal driving is fine. It's just on starts/stops. Transmission is fine, shifts perfect, etc.. Wondering if anyone else has had the issue before? I've been driving it since 178k with it doing this but for whatever reason haven't thought anything about it. Want to get it fixed. Ideas?


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12711594
04/11/18 06:19 AM
04/11/18 06:19 AM
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Slow Drifter Offline
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Motor mount, maybe? I've never had a Duramax, but I've had broken motor mounts on a few vehicles with similar symptoms, more on the taking off than the stopping. Good luck with it.


SD

Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12711603
04/11/18 07:11 AM
04/11/18 07:11 AM
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McKinney, Tx
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CraZyNOTRT Offline
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Check your suspension, sounds like ball joints, worn out bushings, differential, or u joints.

Last edited by CraZyNOTRT; 04/11/18 07:12 AM.
Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12711678
04/11/18 12:18 PM
04/11/18 12:18 PM
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Oeste Del Tejas
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Samsonsworld Online content
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Lot of trucks have axle wrap that causes similar symptoms.

Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12711704
04/11/18 12:44 PM
04/11/18 12:44 PM
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Lindale
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Might check to see if its a 2 piece driveshaft. Sometimes they make a bump feeling when stopping or taking off from a stop! Grease the joint if it is a 2 piece!

Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12711870
04/11/18 02:54 PM
04/11/18 02:54 PM
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Gonzales, Tx
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Grease the slip joint or joints on the drive shaft. You Tube has plenty of how to videos.


Snowflakes and entitled brats will be the doom of America!


Re: Duramax "jerk" when stopping/accelerating [Re: ChuChu1] #12712066
04/11/18 05:04 PM
04/11/18 05:04 PM
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Originally Posted By: ChuChu1
Grease the slip joint or joints on the drive shaft. You Tube has plenty of how to videos.
Yep


Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard
Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12712144
04/11/18 06:10 PM
04/11/18 06:10 PM
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McKinney, Tx
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If the u joints are making that sound REPLACE them. They are too worn out and No amount of grease will fix them. They are cheap and easy to replace.

Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12712172
04/11/18 06:27 PM
04/11/18 06:27 PM
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Pearland, TX
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dk2429 Offline OP
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I'll get under there and grease everything up today to see if that makes a difference.

Something I forgot to add though.. If I pop it into neutral rolling to a stop, it doesn't do it. Just stops normally, put it into drive fine, hit the gas, bump. I also noticed that it only is noticable at operating temp. When the truck is still cold, it's very very minimal or not even noticable


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Duramax "jerk" when stopping/accelerating [Re: CraZyNOTRT] #12712490
04/11/18 10:32 PM
04/11/18 10:32 PM
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Gonzales, Tx
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Originally Posted By: CraZyNOTRT
If the u joints are making that sound REPLACE them. They are too worn out and No amount of grease will fix them. They are cheap and easy to replace.


It's not the u joints, it's the slip yokes. You will have to remove the drive shaft and grease the yoke or yokes on the inside. Don't put too much grease in them, just a light thin layer of grease.

Last edited by ChuChu1; 04/11/18 10:34 PM.

Snowflakes and entitled brats will be the doom of America!


Re: Duramax "jerk" when stopping/accelerating [Re: ChuChu1] #12712793
04/12/18 02:13 AM
04/12/18 02:13 AM
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Pearland, TX
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dk2429 Offline OP
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Originally Posted By: ChuChu1
Originally Posted By: CraZyNOTRT
If the u joints are making that sound REPLACE them. They are too worn out and No amount of grease will fix them. They are cheap and easy to replace.


It's not the u joints, it's the slip yokes. You will have to remove the drive shaft and grease the yoke or yokes on the inside. Don't put too much grease in them, just a light thin layer of grease.


Yep, that's got to be it. I looked up what you mention and they describe what mine is doing. Only thing is, I read that greaseing them will only last you 20-30k miles and it will come back.. I guess the only way to fix this for good is to just a new slip yoke? I don't want to pull the driveshaft every 20k miles or less


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


Re: Duramax "jerk" when stopping/accelerating [Re: patriot07] #12712843
04/12/18 02:47 AM
04/12/18 02:47 AM
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Originally Posted By: patriot07
Originally Posted By: ChuChu1
Grease the slip joint or joints on the drive shaft. You Tube has plenty of how to videos.
Yep

Yep our two both do it greasing it is a temporary fix it will come back. It’s been doing it for over 200k miles and doesn’t seem to hurt anything.

Re: Duramax "jerk" when stopping/accelerating [Re: dk2429] #12713137
04/12/18 01:03 PM
04/12/18 01:03 PM
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Originally Posted By: dk2429
Originally Posted By: ChuChu1
Originally Posted By: CraZyNOTRT
If the u joints are making that sound REPLACE them. They are too worn out and No amount of grease will fix them. They are cheap and easy to replace.


It's not the u joints, it's the slip yokes. You will have to remove the drive shaft and grease the yoke or yokes on the inside. Don't put too much grease in them, just a light thin layer of grease.


Yep, that's got to be it. I looked up what you mention and they describe what mine is doing. Only thing is, I read that greaseing them will only last you 20-30k miles and it will come back.. I guess the only way to fix this for good is to just a new slip yoke? I don't want to pull the driveshaft every 20k miles or less


GM offers a yoke made of nickle that is supposed to fix it.


Snowflakes and entitled brats will be the doom of America!


Re: Duramax "jerk" when stopping/accelerating [Re: ChuChu1] #12713435
04/12/18 03:57 PM
04/12/18 03:57 PM
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Originally Posted By: ChuChu1
Originally Posted By: dk2429
Originally Posted By: ChuChu1
Originally Posted By: CraZyNOTRT
If the u joints are making that sound REPLACE them. They are too worn out and No amount of grease will fix them. They are cheap and easy to replace.


It's not the u joints, it's the slip yokes. You will have to remove the drive shaft and grease the yoke or yokes on the inside. Don't put too much grease in them, just a light thin layer of grease.


Yep, that's got to be it. I looked up what you mention and they describe what mine is doing. Only thing is, I read that greaseing them will only last you 20-30k miles and it will come back.. I guess the only way to fix this for good is to just a new slip yoke? I don't want to pull the driveshaft every 20k miles or less


GM offers a yoke made of nickle that is supposed to fix it.
That's a crummy solution, unless they're offering it as a free replacement for owners, which I'm sure they're not...


Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard
Re: Duramax "jerk" when stopping/accelerating [Re: redchevy] #12714179
04/13/18 12:07 AM
04/13/18 12:07 AM
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Originally Posted By: redchevy
Originally Posted By: patriot07
Originally Posted By: ChuChu1
Grease the slip joint or joints on the drive shaft. You Tube has plenty of how to videos.
Yep

Yep our two both do it greasing it is a temporary fix it will come back. It’s been doing it for over 200k miles and doesn’t seem to hurt anything.


So I take it, this is a common problem on these trucks I'm not aware about? I know it's not hurting anything, it's just annoying.


Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


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