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Screeching sound when accelerating

Crowny

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VZ Executive
Hi All, I've got a bit of an issue from time to time with my VZ Exec. Sometimes when I pull out to overtake on country roads there is a screeching sound that seems to come from the middle of the car when I first accelerate. Does anyone have any idea what this might be? Only seems to happen at high speeds on country trips and doesn't happen at all in city driving
 

ant797

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Im only guessing something to do with your torque converter run a scan and see if there is any torque clutch control codes
 

krusing

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Could even be the serpentine belt is stretched to its max length,
where a pulley also maybe be faulty and the bearing is starting to seize up, causing the belt to slip.
 
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