Think I figured out the shuddering when starting from a stop...can't believe it - Ford Focus Forum, Ford Focus ST Forum
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Old 10-03-2012, 07:54 AM   #1
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Think I figured out the shuddering when starting from a stop...can't believe it

So I've had more issues with the shuddering than I could even explain, and it all started with the TSB for the transmission update. Since that point, it's shuddered mostly every time I start from a stop. It's obnoxious, and makes the car feel cheap and crappy when people are riding in it. I've had it in the shop probably 3-4 times for this issue and every time they've said "It's supposed to act like that" and that the computer displays no errors.

So what did I do today? Turned off Traction Control. The second I turned it off, the shuddering from a stop no longer happened. I drove my 15 minute commute to work without a *single* shudder. The shifts were smooth, the starts and stops were smooth, and even mashing the gas when going into a corner from a stop or slow roll didn't make the car buck around like it was having a stroke.

Turn it back on? And the shuddering happened the very next light. Turned it back off, and no more shuddering.

Is it possible that this issue is somehow related to the Traction Control module initiating when it doesn't need to? I have lighter wheels on the car than stock (Sparco Assetto 18), but didn't have an issue with this until the TSB update. The lighter wheels might fool the computer into thinking it's losing traction (since there's less friction and resistance on the drive shaft), but I really can't postulate an answer beyond that.

For those of you with "Shuddering" issues, please help me test this by just disabling the Traction Control and driving like you normally would. If it's gone (or at least severely reduced), post back and let me know. Maybe Ford needs to issue a recall for the *CORRECT* part in the car this time.

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