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·Hi, just had a new dual mass fly wheel fitted and two weeks later they fitted a new clutch. Getting vibrations through the clutch pedal when started up, is this normal? Thanks.
Dual Mass + Clutch
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I'm getting clunking when changing gear in first and second and when resting my foot on the clutch pedal during acceleration I feel an oscillation through the pedal. Any idea if this would be a faulty DMF, the car has only done 6k miles?
Many Thanks
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mines does that mate its normal i think. also dont ride the clutch like that becuase it wears things out
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Why are you resting your foot on the clutch, the DMF should make the take up off drive smoother? how bad is the vibration? the clunking maybe the selectors need adjusting.
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I rest my foot on the clutch round town as I'm forever changing gear, only lightly though. Sort of ties up with DMF symtoms I found.
Ford have diagnosed the clunking as needing a driveshaft replacing, they have already done the TSB spline gluing thing, I'm not convinced on driveshaft or CV. I'm thinking DMF although looks like most ST's have the noise but to different degrees. Nightmare pain in the back end!
What exactly is a "dual mass flywheel"
The flywheel is effectively a weight which is fastened to the end of the crankshaft of the engine. The power from the pistons tends to be created in ?pulses? and the weight of the flywheel smoothes out these pulses by providing inertia to the rotating engine.
The dual mass flywheel is there to reduce torsional oscillation of the whole drivetrain, and is specified primarily as a noise, vibration, and harshness countermeasure.
The dual mass flywheel acts as a low pass filter in the drivetrain system.
The incorporation of an intermediate mass-spring system attenuates the higher frequency components of this type of noise source, reducing the noise and vibration felt, and heard by the driver.
From another forum..
Q: So I thought my clutch was slipping, so I went and got a new clutch.
Mechanic took the gearbox out etc and said the clutch looks fine but there is quite a lot of play in the flywheel. Would this give symptoms of the clutch slipping? Is this a regular occurrence with remapped cars?
A: No! The flywheel having play in it would just feel clunky!
Q: Im currently having to replace my flywheel due to it duffing out starter motors. Its broke 2 in a month. The guy at Ford said it cant handle the amount of Torque a remapped ST chucks at it. Im not sure why it causes starter motor problems but apparently it does. Im gonna replace mine with the RS items when i have the cash. Im running Mod C by the way.
A: I am certain that would be false economy - we have changed many ST clutches over the last 18 months
We check each unit once we have removed it.
On approx 70% of the cars it is clear that the friction plate has been slipping - the friction plate is worn, the bell housing is full of dust (smells) and you can see 'scorch' marks in the flywheel face.
However the remaining 30% are certainly the flywheel slipping. It is very hard to correctly test the flywheel - When new they can be turned by hand 2-3 teeth - worn ones you can turn by hand 6-7 teeth
Should we not have a Forum specifically for DMFs !!!!!!!!!
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