Why not buy a Centerforce dual friction clutch?

[Bbannongmu]

Isn't there two clutch disks in the OEM?

It’s a dual mass flywheel - not a twin disk clutch. So there is only 1 clutch disk. The flywheel mass is split into two separate pieces and load is transferred through a bearing and springs. This is supposed to help with vibration and really helps 4cylinder in line vehicle that have a lot of vibration (Even number, V format engines , V-6, V-8…tend to have less of this vibration in stock form and firing order). I suspect this is the source if the vague, weak almost slip feeling from the stock clutch when towing, backing a trailer or Rock crawling.

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[Bbannongmu]

yes there is. one outside the pressure plate and one inside the pressure plate.

Really just 1 disk with some complicated stuff going on. The pressure plate side is riveted together. The flywheel side has two independent rotating flywheels.

 

[Ball_Ze]

It’s a dual mass flywheel - not a twin disk clutch. So there is only 1 clutch disk. The flywheel mass is split into two separate pieces and load is transferred through a bearing and springs. This is supposed to help with vibration and really helps 4cylinder in line vehicle that have a lot of vibration (Even number, V format engines , V-6, V-8…tend to have less of this vibration in stock form and firing order). I suspect this is the source if the vague, weak almost slip feeling from the stock clutch when towing, backing a trailer or Rock crawling.

Nope - your pictures above and video prove it. Two disks in this setup. If not, how would these these splines let the whole assembly release?

 

[Ball_Ze]

yes there is. one outside the pressure plate and one inside the pressure plate.

that's what I thought after looking at the photos.

 

[Bbannongmu]

Nope - your pictures above and video prove it. Two disks in this setup. If not, how would these these splines let the whole assembly release?

Nope - your pictures above and video prove it. Two disks in this setup. If not, how would these these splines let the whole assembly release?

I’m looking at it in person and there is 1 disk. It’s described as a dual mass flywheel. Here is the parts diagram from Mopar
https://www.mymoparparts.com/oem-pa...yJnk9MjAyMCZ0PXJ1Ymljb24mZT0zLTZsLXY2LWdhcw==

And

https://www.mymoparparts.com/oem-pa...vciZ5PTIwMjAmdD1ydWJpY29uJmU9My02bC12Ni1nYXM=

The pressure plate you see on the right as you look at it, is riveted together so the friction surface is not independent and there is no separate disk between the pressure plate and flywheel(s). Hope that clarifies what it looks like in person.

A decent description of a DMF found here: https://haynes.com/en-us/tips-tutorials/what-dual-mass-flywheel-and-what-does-it-do

 

[bryanklay]

earlier today, i talked to Allmoparparts.com and found out the ship dates should be between the 15th and 17th of February for the clutch assembly. my plan is to tear down the jeep on the 20th and 21st because i will have received the shipping notice of the clutch assembly. i did order the flywheel assembly and that should be in just prior to the tear down. once i get the old flywheel off, i plan on tearing both the flywheel apart and the pressure plate apart to see what it looks like on the inside. i also plan on taking pictures and placing those here for us to discuss.

 

[NachoRuby]

The jeep website describes the JT and JL as having a dual mass flywheel (which I hate, my VW GLi had one too), and a dual disk clutch (which I'm ok with)

 

[bryanklay]

The jeep website describes the JT ,ma d JL as having a dual mass flywheel (which I hate, my VW GLi had one too), and a dual disk clutch (which I'm ok with)
The jeep site describes it as twin disk with a dual mass flywheel.

Improved durability. in their dreams.

 

[Ball_Ze]

I’m looking at it in person and there is 1 disk. It’s described as a dual mass flywheel. Here is the parts diagram from Mopar
https://www.mymoparparts.com/oem-parts/mopar-pressure-plate-and-disc-clutch-kit-68273845ad?c=Zz1jbHV0Y2gmcz1jbHV0Y2gmbD0yJm49U2VhcmNoIFJlc3VsdHMmYT1qZWVwJm89Z2xhZGlhdG9yJnk9MjAyMCZ0PXJ1Ymljb24mZT0zLTZsLXY2LWdhcw==

And

https://www.mymoparparts.com/oem-parts/mopar-engine-flywheel-68273846ac?c=Zz1lbmdpbmUmcz1jcmFua3NoYWZ0LXBpc3Rvbi1kcml2ZS1wbGF0ZS1mbHl3aGVlbC1hbmQtZGFtcGVyJmw9MSZuPVNlYXJjaCBSZXN1bHRzJmE9amVlcCZvPWdsYWRpYXRvciZ5PTIwMjAmdD1ydWJpY29uJmU9My02bC12Ni1nYXM=

The pressure plate you see on the right as you look at it, is riveted together so the friction surface is not independent and there is no separate disk between the pressure plate and flywheel(s). Hope that clarifies what it looks like in person.

A decent description of a DMF found here: https://haynes.com/en-us/tips-tutorials/what-dual-mass-flywheel-and-what-does-it-do

I didn't ask about the flywheel. Also, the mopar parts fiche shows a standard picture, not an accurate one - but as I think on it - I'd bet the pressure plate comes with one disk already inside of it and a loose disk to go between the pressure plate and flywheel.

I think you need to take a much closer look - on the other side of the pressure plate, there is, in fact, another clutch disk that has splines to connect to the free clutch disk.

Again, I've pointed out the interface. if that wasn't another disk, the splines would make the pressure plate and the clutch disk a solid piece.

I've answered my own question. It's dual disk. ?

 

[seven30]

Can you tell if its also dual mass? It would be interesting to lock down the dual mass section and see how it behaves regarding stalling.

 

[bryanklay]

good afternoon all,
as you know, i have to replace the clutch assembly in my jeep. i have sitting at home the flywheel assembly and the throw-out bearing. i just received the email for shipping of the clutch assembly. i had to go OEM because Centerforce has not released theirs yet. i will be doing the teardown on Sunday with the clutch assembly arriving on Wednesday of next week for the install on Saturday the 26th. i will be tearing in to the pressure plate assembly on Monday to figure out what is going on and i will upload pictures then.

 

[Bbannongmu]

good afternoon all,
as you know, i have to replace the clutch assembly in my jeep. i have sitting at home the flywheel assembly and the throw-out bearing. i just received the email for shipping of the clutch assembly. i had to go OEM because Centerforce has not released theirs yet. i will be doing the teardown on Sunday with the clutch assembly arriving on Wednesday of next week for the install on Saturday the 26th. i will be tearing in to the pressure plate assembly on Monday to figure out what is going on and i will upload pictures then.

Good luck!

 

[seven30]

good afternoon all,
as you know, i have to replace the clutch assembly in my jeep. i have sitting at home the flywheel assembly and the throw-out bearing. i just received the email for shipping of the clutch assembly. i had to go OEM because Centerforce has not released theirs yet. i will be doing the teardown on Sunday with the clutch assembly arriving on Wednesday of next week for the install on Saturday the 26th. i will be tearing in to the pressure plate assembly on Monday to figure out what is going on and i will upload pictures then.

Looking forward to that. Would also like to find out if this thing is a so called dual mass design too.

 

[bryanklay]

good evening all
what a project. i started on Sunday and got to the point where i had to stop because i was getting frustrated with removing parts. i stopped at the transmission and planned on removing the transmission on Monday. the nice part was the parts from Allmoparparts.com were to be delivered today (Monday). when you look at the pictures, i want to make a statement that i have owned vehicles with a standard transmission since i started driving in 1978 in a 1970 ford falcon.

i was shocked by what i saw when i removed the clutch assembly from the flywheel and even the flywheel was just as bad as the clutch assembly. at the end of the day today, i have the clutch assembly installed as well as the transmission installed. on Wednesday i will install the transfer case and the shift cables.

as to the old parts, the reason jeep calls the flywheel a dual mass flywheel is because the flywheel has attached to it a clutch basket the moves in a rotational pattern. in other words, the clutch basket moves rotationally left and right and as it does, it locks tighter to the flywheel.

now on to the clutch assembly. it does have two clutch disks and three steel plates. in the pressure plate assembly there are two steel plates and one disk. the third plate is attached to the clutch basket that is attached to the flywheel. the primary clutch disk is attached to the secondary clutch disk in the pressure plate thru the use of a gear system. this allows the two clutch disks to work together with a steel plate between them. to keep the pressure on the secondary clutch disk, the steel plate, that goes between the two clutch disks, is attached to the pressure plate by 3 large rivets that allow the plate to move inward but not out. these three rivets have two steel bands that i believe keep tension on the disk in order to bring pressure on that disk for return once the clutch has been released. it also has the three small rivets that keep the plate in place as well. i am not sure what their job is at this time.

a few observations of what the damage is. one major observation is this clutch got very hot in a short period. the clutch disks where going to have to be replaced within 5000 miles based on how close the clutch material is down to thew rivets. on the two steel plates the secondary disk goes between, the outer edge of both plates are grooved in two places if you look closely, you can see the grooved areas. in digging further, the secondary disk shows wear at the outer edge which corresponds with the grooved areas on the two steel disks.

at this point i am now open to all of the torment and harassment about me riding the clutch which i do not do.

If you want to have any pictures done close up, please let me know and i will take them and upload them to this discussion.

 

[Bbannongmu]

good evening all
what a project. i started on Sunday and got to the point where i had to stop because i was getting frustrated with removing parts. i stopped at the transmission and planned on removing the transmission on Monday. the nice part was the parts from Allmoparparts.com were to be delivered today (Monday). when you look at the pictures, i want to make a statement that i have owned vehicles with a standard transmission since i started driving in 1978 in a 1970 ford falcon.

i was shocked by what i saw when i removed the clutch assembly from the flywheel and even the flywheel was just as bad as the clutch assembly. at the end of the day today, i have the clutch assembly installed as well as the transmission installed. on Wednesday i will install the transfer case and the shift cables.

as to the old parts, the reason jeep calls the flywheel a dual mass flywheel is because the flywheel has attached to it a clutch basket the moves in a rotational pattern. in other words, the clutch basket moves rotationally left and right and as it does, it locks tighter to the flywheel.

now on to the clutch assembly. it does have two clutch disks and three steel plates. in the pressure plate assembly there are two steel plates and one disk. the third plate is attached to the clutch basket that is attached to the flywheel. the primary clutch disk is attached to the secondary clutch disk in the pressure plate thru the use of a gear system. this allows the two clutch disks to work together with a steel plate between them. to keep the pressure on the secondary clutch disk, the steel plate, that goes between the two clutch disks, is attached to the pressure plate by 3 large rivets that allow the plate to move inward but not out. these three rivets have two steel bands that i believe keep tension on the disk in order to bring pressure on that disk for return once the clutch has been released. it also has the three small rivets that keep the plate in place as well. i am not sure what their job is at this time.

a few observations of what the damage is. one major observation is this clutch got very hot in a short period. the clutch disks where going to have to be replaced within 5000 miles based on how close the clutch material is down to thew rivets. on the two steel plates the secondary disk goes between, the outer edge of both plates are grooved in two places if you look closely, you can see the grooved areas. in digging further, the secondary disk shows wear at the outer edge which corresponds with the grooved areas on the two steel disks.

at this point i am now open to all of the torment and harassment about me riding the clutch which i do not do.

If you want to have any pictures done close up, please let me know and i will take them and upload them to this discussion.

Definitely looks like you got a bad one - out of spec. Good luck with the new clutch setup.

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