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Mcleod twin disc clutch trouble #1637645
06/23/14 07:58 PM
06/23/14 07:58 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
super stock
73cuda340  Offline OP
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clarks summit pa
I just put a new Mcleod twin disc clutch in my cuda. No matter where I adjust the clutch on the adjusting rod, it wants to go overcenter. I cant even drive the car, that's how far out the adjustment is. I measured everything with feeler gauges when installing and according to the instruction sheet they were within tolerance. The only way I can get the clutch to not go overcenter is if I have the rod backed off almost the entire way, but then the pedal is about a little past quarter way from the floor when its all the way up. All the linkage is brand new, new z bar and all new bushings too so nothing is worn out. Has anybody else had any problems with these? It has been nothing but a problem since I bought it.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637646
06/23/14 08:46 PM
06/23/14 08:46 PM
Joined: Dec 2010
Posts: 1,035
Missouri U.S.A.
7
71yelladustr Offline
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71yelladustr  Offline
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May have to remove the large over-center spring on the pedal assembly. I had to do this on my duster so the clutch had some "feel" to it after I put the Mcleod DD in.


392 gen III hemi on E-85 727 trans Dana 60
10.02@134
Re: Mcleod twin disc clutch trouble [Re: 71yelladustr] #1637647
06/23/14 08:55 PM
06/23/14 08:55 PM
Joined: Dec 2007
Posts: 18,153
Mass
DAYCLONA Offline
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Quote:

May have to remove the large over-center spring on the pedal assembly. I had to do this on my duster so the clutch had some "feel" to it after I put the Mcleod DD in.






Agreed,if the over center spring is present, it's got to go

Re: Mcleod twin disc clutch trouble [Re: 71yelladustr] #1637648
06/23/14 08:56 PM
06/23/14 08:56 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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73cuda340  Offline OP
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clarks summit pa
Quote:

May have to remove the large over-center spring on the pedal assembly. I had to do this on my duster so the clutch had some "feel" to it after I put the Mcleod DD in.




I tried both. When I removed the overcenter spring it was even worse. The clutch pedal wouldn't return to the top, only part way. You would have to pull it back up.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637649
06/23/14 10:32 PM
06/23/14 10:32 PM
Joined: Jan 2003
Posts: 21,050
Niles , Ohio
T
therocks Offline
oh wait.but hey.lets see.oh yeah.
therocks  Offline
oh wait.but hey.lets see.oh yeah.
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Niles , Ohio
Do you have a small return spring on the fork?It should have one.Rocky


Chrysler Firepower
Re: Mcleod twin disc clutch trouble [Re: therocks] #1637650
06/23/14 10:58 PM
06/23/14 10:58 PM
Joined: Feb 2007
Posts: 749
NY
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Beep Beep Offline
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I am running one in my 69RR with the over spring removed and no issues here.

Re: Mcleod twin disc clutch trouble [Re: therocks] #1637651
06/24/14 01:13 AM
06/24/14 01:13 AM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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73cuda340  Offline OP
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clarks summit pa
Quote:

Do you have a small return spring on the fork?It should have one.Rocky




Yes it has the small return spring. It's brand new but it still isn't enough to pull the pedal up. Even if it did pull it all the way back, I still have basically no pedal until it is almost at the floor.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637652
06/24/14 04:08 PM
06/24/14 04:08 PM
Joined: Jan 2003
Posts: 512
Niwot, CO Formerly denn...
dynorad Offline
mopar
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Niwot, CO Formerly denn...
I put a twin disc in my GTX. I removed the over center, and added a new spring to the fork that pulls everything back upon clutch engagement. I fabbed a bracket (I think it bolts to the block or bell) for the front end and used a cushioned stainless P clamp over the end of the adjustment rod.
Works great.

Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637653
06/24/14 06:11 PM
06/24/14 06:11 PM
Joined: Dec 2004
Posts: 10,550
Rittman Ohio
fourgearsavoy Offline
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Have you adjusted the free-play until the pedal is hard at the top yet? Then back it off till you have about one inch of free-play at the top. After you do that then check your plate departure and install a positive stop so you don't put the fingers into the springs on the disc.
If you can't adjust it to zero free-play then something is wrong with your linkage or you need to adjust your spacing on the release bearing
Gus


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: Mcleod twin disc clutch trouble [Re: fourgearsavoy] #1637654
06/24/14 06:52 PM
06/24/14 06:52 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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clarks summit pa
Quote:

Have you adjusted the free-play until the pedal is hard at the top yet? Then back it off till you have about one inch of free-play at the top. After you do that then check your plate departure and install a positive stop so you don't put the fingers into the springs on the disc.
If you can't adjust it to zero free-play then something is wrong with your linkage or you need to adjust your spacing on the release bearing
Gus




I adjusted it for the one inch of free play and the clutch was going overcenter and actually beginning to re-engage the further you pushed the pedal down. The only way I can keep it from going overcenter is when the pedal is adjusted where its about only 2 inches from the floor. The linkage on the car is fine, its all brand new and the same exact setup I used on the other clutch that I had in my car and everything worked perfectly fine.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637655
06/24/14 10:12 PM
06/24/14 10:12 PM
Joined: Jun 2012
Posts: 337
Valley of the sun, AZ
2
2JcodeChargers Offline
enthusiast
2JcodeChargers  Offline
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Valley of the sun, AZ
I had some initial troubles with this clutch in my 68 Hemi Charger. I was using a Lakewood scatter shield. In this application the pivot for the clutch fork had to be moved back and the hole for the fork had to be enlarged for the clutch to work. These clutches are much thicker than a stock type clutch and you just have to make the room for the fork/throwout bearing.
You didn't mention what you are using for a bell housing so I thought this might help.

Re: Mcleod twin disc clutch trouble [Re: 2JcodeChargers] #1637656
06/24/14 11:53 PM
06/24/14 11:53 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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just a stock bellhousing, but thanks


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637657
06/25/14 02:08 AM
06/25/14 02:08 AM
Joined: Mar 2007
Posts: 3,275
West Coast, USA
jbc426 Offline
master
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West Coast, USA
How long are each of the arms on the Z-bar from the outside of the tube to the center of the rod pins?

How long is the throwout bearing release arm from the contact tips to clutch rod adjustment hole?

There are at least 3 different z-bars and clutch forks AND clutch fork pivot shapes for Mopars. It all depends on which ones you have. Identifying them by precise measurements and then running it by Brewers could be enlightening.

Last edited by jbc426; 06/25/14 01:14 PM.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637658
06/25/14 05:22 AM
06/25/14 05:22 AM
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
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Sxrxrnr Offline
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Is this the same car that had what was initially suggested to have transmission linkage issues in a different thread last week?

Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637659
06/25/14 05:58 PM
06/25/14 05:58 PM
Joined: Dec 2004
Posts: 10,550
Rittman Ohio
fourgearsavoy Offline
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Quote:

Quote:

Have you adjusted the free-play until the pedal is hard at the top yet? Then back it off till you have about one inch of free-play at the top. After you do that then check your plate departure and install a positive stop so you don't put the fingers into the springs on the disc.
If you can't adjust it to zero free-play then something is wrong with your linkage or you need to adjust your spacing on the release bearing
Gus




I adjusted it for the one inch of free play and the clutch was going overcenter and actually beginning to re-engage the further you pushed the pedal down. The only way I can keep it from going overcenter is when the pedal is adjusted where its about only 2 inches from the floor. The linkage on the car is fine, its all brand new and the same exact setup I used on the other clutch that I had in my car and everything worked perfectly fine.



This is why I suggested a positive pedal stop. When I had a twin in my car I needed to install a stop because the fingers would actually touch the disc when the pedal was pushed all the way down.
I just adjusted the pedal stop so my air gap was .030 between the floater and the first disc.
Gus

8187505-savoyburnout.jpg (75 downloads)

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: Mcleod twin disc clutch trouble [Re: Sxrxrnr] #1637660
06/25/14 06:47 PM
06/25/14 06:47 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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73cuda340  Offline OP
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clarks summit pa
Quote:

Is this the same car that had what was initially suggested to have transmission linkage issues in a different thread last week?




Yes, this is the same car. Im chasing two problems at the same time which doesn't help. I believe that the clutch is what is causing my problem though. Im just trying to start with the clutch first and hopefully it takes care of my shifting problem too.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: fourgearsavoy] #1637661
06/25/14 06:52 PM
06/25/14 06:52 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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73cuda340  Offline OP
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clarks summit pa
Quote:

Quote:

Quote:

Have you adjusted the free-play until the pedal is hard at the top yet? Then back it off till you have about one inch of free-play at the top. After you do that then check your plate departure and install a positive stop so you don't put the fingers into the springs on the disc.
If you can't adjust it to zero free-play then something is wrong with your linkage or you need to adjust your spacing on the release bearing
Gus




I adjusted it for the one inch of free play and the clutch was going overcenter and actually beginning to re-engage the further you pushed the pedal down. The only way I can keep it from going overcenter is when the pedal is adjusted where its about only 2 inches from the floor. The linkage on the car is fine, its all brand new and the same exact setup I used on the other clutch that I had in my car and everything worked perfectly fine.



This is why I suggested a positive pedal stop. When I had a twin in my car I needed to install a stop because the fingers would actually touch the disc when the pedal was pushed all the way down.
I just adjusted the pedal stop so my air gap was .030 between the floater and the first disc.
Gus




Whats involved in installing the positive stop for the pedal and where can I get one., Ive never seen one in person before. Im at work now so Im not sure on the measurements, but I ordered the big block E body Z bar from brewers when I was installing everything so Im hoping that I received the right one.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637662
06/25/14 07:14 PM
06/25/14 07:14 PM
Joined: Jul 2013
Posts: 1,272
Northern Calyfornua
S
Sxrxrnr Offline
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Northern Calyfornua
Quote:

Quote:

Is this the same car that had what was initially suggested to have transmission linkage issues in a different thread last week?




Yes, this is the same car. Im chasing two problems at the same time which doesn't help. I believe that the clutch is what is causing my problem though. Im just trying to start with the clutch first and hopefully it takes care of my shifting problem too.






I've been somewhat sorry that I did not install a hydraulic clutch in my car while the engine was out a few months back. Have one in another car and feels much smoother, manageable and easier on my aging leg.

Last edited by Sxrxrnr; 06/25/14 07:15 PM.
Re: Mcleod twin disc clutch trouble [Re: 73cuda340] #1637663
06/25/14 09:28 PM
06/25/14 09:28 PM
Joined: Dec 2004
Posts: 10,550
Rittman Ohio
fourgearsavoy Offline
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Rittman Ohio
I used a piece of 3/8" threaded rod with some nuts and washers.Just mark the spot on the floor or firewall and drill a hole and insert threaded rod, adjust as necessary.
Just Google images of "clutch pedal stop" there are many options and some very good images of some better more technical designs than mine.
I just try to keep it lightweight and simple and used what I had in the scrap box
Gus

8187671-rearviewsavoy.jpg (107 downloads)

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: Mcleod twin disc clutch trouble [Re: fourgearsavoy] #1637664
06/25/14 11:12 PM
06/25/14 11:12 PM
Joined: Jun 2007
Posts: 1,167
clarks summit pa
73cuda340 Offline OP
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ok thanks.


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
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