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Old 04-04-2010, 05:52 AM
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Question about acceleration

Hey guys, I have a question for you about an odd thing I get when I first come off the line from a stop. I'm used to driving SUV's. I have never had a big truck until I got my 6.4 so it may be something common to HD trucks. When I take off I get kind of a shudder. The best way to describe it is like there is a little slack somewhere in the drivetrain that is being taken out when I accelerate. I dont think it's been doing it the whole time ive had the truck but maybe ive just been ignoring it until recently. It doesnt feel like anything major but i'd appreciate some input. By the way it's an 09 cc sb 250 with 12k miles, completely stock. Thanks.
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Old 04-04-2010, 06:52 AM
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Sounds like turbo lag, nothing to worry about. The turbo runs off the exhuast and take a couple seconds to spool up and build boost. That's the delay you feel off the line.

Last edited by Mexigeo; 04-04-2010 at 06:56 AM.
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Old 04-04-2010, 08:24 AM
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Turbo lag actually causes the truck to shake a little bit?
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Old 04-04-2010, 08:40 AM
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no, that is more a common issue you are having. do a search for carrier bearing shims i believe it is. there were some fixes.
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Old 04-04-2010, 09:29 AM
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Pinion Angle TSB 09-20-5

09-20-5*** SHUDDER OR VIBRATION ON ACCELERATION - ESPECIALLY WHEN LOADED
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Old 04-12-2010, 07:01 AM
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Quote:
Originally Posted by Longhaultransport View Post
does a TSB mean the dealer is required to fix it for free?
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Old 04-12-2010, 01:37 PM
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Quote:
Originally Posted by H0USE View Post
does a TSB mean the dealer is required to fix it for free?
No, its a trouble shooting aid for technicians. however if you have the issue, and are under warranty then the dealer should fix it for free because its a warranty issue.
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Old 04-12-2010, 01:44 PM
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Ours does it when you accelerate HARD from a stop..
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