Clutch Dampening Device (CDD)?

Synchros shot? Weird noises while shifting? Not sure what needs to be replaced?
Post Reply
User avatar
six
Master Standardshifter
Posts: 4674
Joined: Thu Mar 16, 2006 4:45 pm
Cars: 2015 Chevrolet SS 6MT
Location: California, U.S.

Clutch Dampening Device (CDD)?

Post by six »

What is a Clutch Dampening Device (CDD) and how does it work?

I think my Acura has one. I can't drop the clutch. Well, I can, but when I do, it doesn't behave like I dropped the clutch.
Image
2015 Heron White Chevrolet SS Sedan 6MT
User avatar
six
Master Standardshifter
Posts: 4674
Joined: Thu Mar 16, 2006 4:45 pm
Cars: 2015 Chevrolet SS 6MT
Location: California, U.S.

Re: Clutch Dampening Device (CDD)?

Post by six »

Wow, an auto-slipper. Who'da thunk it?
Image
2015 Heron White Chevrolet SS Sedan 6MT
Rope-Pusher
Master Standardshifter
Posts: 11607
Joined: Mon Mar 16, 2009 3:44 pm
Cars: '08 Jeep Liberty
Location: Greater Detroit Area

Re: Clutch Dampening Device (CDD)?

Post by Rope-Pusher »

six wrote:Wow, an auto-slipper. Who'da thunk it?
Been done Before
'08 Jeep Liberty 6-Speed MT - "Last of the Mohicans"
User avatar
theholycow
Master Standardshifter
Posts: 16021
Joined: Tue Jun 24, 2008 1:36 pm
Cars: '80 Buick LeSabre 4.1 5MT
Location: Glocester, RI
Contact:

Re: Clutch Dampening Device (CDD)?

Post by theholycow »

Aren't they common on new BMWs or something?
1980 Buick LeSabre 4.1L 5MT

Put your car in your sig!

Learn to launch/FAQs/lugging/misused terms: meta-sig
watkins wrote:Humans have rear-biased AWD. Cows have 4WD
User avatar
fa22raptorf22
Master Standardshifter
Posts: 1282
Joined: Sat Nov 29, 2008 9:31 pm
Cars: 2004 SSM Acura RSX
Location: Norwalk, CT

Re: Clutch Dampening Device (CDD)?

Post by fa22raptorf22 »

theholycow wrote:Aren't they common on new BMWs or something?
Indeed. Its called a CDV or Clutch Delay Valve.

Can be fixed by removing the component entirely, or gutting it.

The RSX's never came with one which is a relief.
User avatar
six
Master Standardshifter
Posts: 4674
Joined: Thu Mar 16, 2006 4:45 pm
Cars: 2015 Chevrolet SS 6MT
Location: California, U.S.

Re: Clutch Dampening Device (CDD)?

Post by six »

Removing it on the Acura doesn't seem too daunting a task. However, what scares me is having to bleed the system after I'm done. Hydraulics is definitely my weakpoint, and I'm too afraid I'll mess things up and I end up "losing hydraulics" in the middle of the road. Never bleeded any system in my life.
Image
2015 Heron White Chevrolet SS Sedan 6MT
LHOswald
Master Standardshifter
Posts: 2787
Joined: Mon Apr 06, 2009 10:46 pm
Cars: '99 Civic Hatch w/B16a
Location: Enfield, Connecticut

Re: Clutch Dampening Device (CDD)?

Post by LHOswald »

really simple process. you can find directions on how to do it all over the internet. you need 2 people to do it properly though
Image
User avatar
theholycow
Master Standardshifter
Posts: 16021
Joined: Tue Jun 24, 2008 1:36 pm
Cars: '80 Buick LeSabre 4.1 5MT
Location: Glocester, RI
Contact:

Re: Clutch Dampening Device (CDD)?

Post by theholycow »

I felt the same way about bleeding hydraulics. I remember the awful brakes I had on my first car after getting air in the system during a brake job, and how I failed miserably at trying to bleed it.

I was thrown head first into bleeding a clutch, not by choice, when I got the Buick running but forgot to make sure the clutch hose was secure...it was up against the exhaust manifold. Due to the car's design (or lack thereof...I am NOT an engineer, I just pretended I was one while I bolted stuff together) I couldn't easily use the bleeder screw on the slave, which I feared made the whole thing worse.

Anyway, it turned out to be really easy. I didn't have to use the bleeder screw. All I had to do was make sure there was fluid in the master cylinder's reservoir and pump the clutch pedal for a few minutes. I'd pump it a bunch of times, check the reservoir, pump it more, until bubbles stopped coming up/it felt right/I could see the slave move properly when I pressed the clutch pedal.
1980 Buick LeSabre 4.1L 5MT

Put your car in your sig!

Learn to launch/FAQs/lugging/misused terms: meta-sig
watkins wrote:Humans have rear-biased AWD. Cows have 4WD
User avatar
FDSpirit
Master Standardshifter
Posts: 6157
Joined: Sun Mar 22, 2009 8:23 pm
Cars: 2000 Honda Civic Si
Location: Troy/Albany, NY
Contact:

Re: Clutch Dampening Device (CDD)?

Post by FDSpirit »

If the system is like mine, bleeding it shouldn't be too big of an issue. Having an extra person there makes a world of difference.
2000 Honda Civic Si- Slightly faster than your grandmomma's grocery getter......slightly.
LHOswald
Master Standardshifter
Posts: 2787
Joined: Mon Apr 06, 2009 10:46 pm
Cars: '99 Civic Hatch w/B16a
Location: Enfield, Connecticut

Re: Clutch Dampening Device (CDD)?

Post by LHOswald »

bled the brakes on my buddies MR2 the other day and we could not for the life of us get the air bubbles out of the system. idk if they have notoriously bad lines that are prone to catching air or what but the brake pedal went almost to the floor (maybe a half an inch) and then it would grab suddenly. weird
Image
Post Reply