dual mass flywheel

[oldschooldiesel]

got a question for you guys is it possible for my flywheel to be going? I have a shutter between 25 to 35 mph or when I let up on the pedal after hard acceleration. And my carrier bearing has been replaced twice in a year?

[madpogue]

Remove the inspection cover and try to rotate the pressure plate / clutch cover. If it rotates, even a few degrees, relative to the part of the flywheel that has the starter gear, the dual-mass flywheel is starting to let go.

Do you hear a clack/clunk sound as you shut down the engine?

[oldschooldiesel]

I'm not sure about any noise don't really listen though and truck will be on a lift this weekend so i'll pull the cover and check. thank you

[Patrick Feeley]

Measure the distance (at the flywheel rim) that you can counter-rotate the masses against each other. Anyhting more than 5/8" and its probably on it's way out. Make sure the flywheel dampening springs and the plastic retainers are all there and not in pieces. On shut down, listen to it shut down in neutral, clutch out. Listen to it shut down with the clutch in. Usually if its going it will be a lot more clacky/clunky (madpogue's term ) with the clutch out. Cheers!

[dusty14319]

If the flywheel is in question, check for play like your checking the thrust bearing on the crankshaft. If it moves at all, can it. Ive replaced nearly every one ive gotten close to.