Dual mass flywheel vs the Vibration

[DBond]

I am considering ordering a CTD with the new 6 speed, and wanted to learn what a dual mass flywheel was, as that new part has some rather negative comments here.



So I learn that the design intention of the dual mass flywheel is to reduce noise and vibration...



zfsachs.com

"The engine‘s ignition-induced rotational speed irregularity causes torsional vibration in the vehicle‘s driveline. At a given speed the ignition frequency is equal to the natural frequency of the driveline so that extremely high vibration amplitudes occur that cause transmission rattle and body boom. "



This sounds to me like the vibration problem on the 3rd gen CTD that many have had.



So maybe this is a design solution for vibration on the manual, though at a reliability risk.



Do we know who manufactures the unit Dodge is using, and might it be a better one than used by Ford and GM?

 

[SRadke]

I would not go so far as to say the current vibration problems are clutch related. I cured mine by changing pinion angle, others have found out of balance drivelines and still others have found resolution in bad u-joints. I've yet to hear of anyone solving a vibration issue with a clutch replacement.



-Scott

 

[DBond]

I would not go so far as to say the current vibration problems are clutch related. ... I've yet to hear of anyone solving a vibration issue with a clutch replacement.



-Scott

I'm didn't say it's caused by the clutch, but that engine / driveline vibratons might be a contributing factor, which the dual mass flywheel might stop.



I don't think anyone has done a swap to a dual mass flywheel (and probably wouldn't want to for other reasons)

 

[LSteiner]

I am considering ordering a CTD with the new 6 speed, and wanted to learn what a dual mass flywheel was, as that new part has some rather negative comments here.



So I learn that the design intention of the dual mass flywheel is to reduce noise and vibration...



zfsachs.com

"The engine‘s ignition-induced rotational speed irregularity causes torsional vibration in the vehicle‘s driveline. At a given speed the ignition frequency is equal to the natural frequency of the driveline so that extremely high vibration amplitudes occur that cause transmission rattle and body boom. "



This sounds to me like the vibration problem on the 3rd gen CTD that many have had.



So maybe this is a design solution for vibration on the manual, though at a reliability risk.



Do we know who manufactures the unit Dodge is using, and might it be a better one than used by Ford and GM?

The first thing that comes to my mind is the question Then why isn't everyone driving a 3rd gen having the problem?



To me, it's logical to think it is a quality control problem involveing parts

and/or assembly.



Larry

 

[FATCAT]

Read this link about DMF transmissions. Apparently there are a lot of problems with this type of manual transmission. That is why Ford stoped using them in their trucks a few years ago.

 

[JTryles]

Read this link about DMF transmissions. Apparently there are a lot of problems with this type of manual transmission. That is why Ford stoped using them in their trucks a few years ago.

"Friction Ring The friction ring located between the inner and outer flywheel is designed to allow the inner and outer flywheel to slip. This feature saves the transmission from damage when torque loads exceed the vehicle rating of the transmission. The friction ring will wear out if excessive torque loads are continuously applied. Loading the vehicle beyond the rated load capacity is often the root cause of friction ring failures in DMF's. "



"... will wear out if excessive torque loads are continuously applied. " So does this mean the end of BOMB-ing? Doesn't sound good! :{

 

[doldenburg]

I have seen 1 early ford ps and 2 chevy 6. 5 have problems with these. very expensive.

 

[FATCAT]

"Friction Ring The friction ring located between the inner and outer flywheel is designed to allow the inner and outer flywheel to slip. This feature saves the transmission from damage when torque loads exceed the vehicle rating of the transmission. The friction ring will wear out if excessive torque loads are continuously applied. Loading the vehicle beyond the rated load capacity is often the root cause of friction ring failures in DMF's. "



"... will wear out if excessive torque loads are continuously applied. " So does this mean the end of BOMB-ing? Doesn't sound good! :{

Yes ... It does mean the end of BOMB-ing! since the new transmission will be "tunned" to the stock engine.

SouthBend will be making TRUCKLOADS of money on busted up DMF manual trannys.

 

[lmills]

Yeh, someone will have to step up to the plate and design a single piece flywheel relacement. That's what the Ford guys had to have.

 

[Tim]

Yeh, someone will have to step up to the plate and design a single piece flywheel relacement. That's what the Ford guys had to have.

Exactly.



Nothing good can come from this dual mass flywheel crap, guys. To think so is foolish.

 

[GTOWag]

I have the clutch pedal vibration in my 2004 6 speed and my service manager has recently told me that DC is coming out with a " Composite Flywheel ". I don't know if it is the same thing as a dual mass flywheel or not but it sounds like it. Does anyone out there know if this is something different or the same as a DMF

 

[Buffalo]

You may want to go back further into this forum. Peter from South Bend Clutch had a post in which he said that he had purchased one of the new DM flywheels.



They are made by LUK, the same company that makes the Ford/GM products. As I recall, he said the Dodge product looked heavier-duty than the ones going into the Ford's/GM's.



At the time, he had not taken it apart to look at the quality of the friction material.



Seemed like he was already looking into an upgrade for this new system.



Hope this helps.



Joe F. (Buffalo)