GBC wrote:
I know it's the wrong section, but I'm looking for a quick answer.
What is a dual mass flywheel, and what does it do? Does an Auto have this set up?
I'm still trying to track down the horrible vibration that I’m getting in low revs from the cab.
Internet searches seem to reveal the source of this is either the above DMF, or (as I suspect) the crankshaft pulley where the noise seems to be emanating from.
A ratchet system on the alternator has also been suggested.
I had the driving shaft checked, it was ok.
Ta.
Here is an animation of how a Dual Mass Flywheel works, as previously posted on TDO by Mr Saltmarket.
Dual Mass FlywheelThis video does not start automatically; you need to touch the circle on the video running bar forward a little to start the video.
Hope this helps, but your autobox may not have one of these fitted.
I will ring my mate Nigel (an autobox mega-expert) who will let me know. He DOES have all the answers.
It was the 'clutch' on the alternator, the rumbling noise at low revs has now gone . . . but . . . the refurb alternator they fitted is sheeite and clicks at higher speeds, so it's going back.
FFS.