Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Think I figured out the shuddering when starting from a stop...can't believe it
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Old 10-04-2012, 01:08 AM   #68
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Originally Posted by Focus YBTC View Post
Yes but is it actually the TCS itself or that the DCT clutches are misbehaving? Would slipping transmission clutches somehow play havoc with the TCS? I don't know the tie in between the two but I thought traction control generally worked related to the anti-lock brake system from wheel sensors sending wheel slippage info to a processor and braking info./force back to the slipping wheel(s). I can't see how turning the TCS off makes the trans work better but I don't doubt that it's occurring.
There could also be a torque management logic in play when the TCS is active. We know the car has torque vectoring, which is just a way of using the ABS to control torque steer. However, in most electronic throttle cars, there is a torque managment system that will reduce the throttle plate angle as well as using the ABS to keep wheelspin to a minimum. With the TCS off, these electronic nannies are reduced/defeated and the DCT logic is not competing with the TCS and torque management systems.

I honestly have never turned the TCS off in my MT car. I'm going to try that and see if some of the hesitation I fell is reduced as well. There is a TSB out for the MT's as well, guys report that it wakes up the throttle response. I'm thinking it too backs off the torque management nanny.
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