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Cj7 Clutch Linkage

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by John A. Shows, Aug 25, 2018.

  1. Aug 25, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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    need some help fellas. I have an 84CJ7 with a hydraulic clutch. Has an NV4500 transmission and ever since I’ve owned the Jeep I’ve had to replace the clutch slave cylinder at least twice a year (which is about how often i drive the thing). The problem with the slave is that it’s over extending and pushing the piston out of the cylinder and of course losing the sealed system. I’m ready to swap it to a manual clutch. I have no idea what i need to buy. I’m guessing just buy the pedals and linkage but I’d appreciate specific pointers. Is it difficult to do? Any other issues? Where do i start? eBay? Or buy new aftermarket parts? Who sells them?
     
  2. Aug 25, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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  3. Aug 25, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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    Also...if my Jeep came with a hydraulic clutch will there be holes drilled in it already for mounting the new pedal assembly? Or will i have to drill them? Not worried about drilling a few holes but if the holes were prescribed then it would make lignin everything up easier.

    And, i think read in advance adapters website that the manual clutch linkage mounted to the side of the bell housing. How’s that gonna work if i have a different transmission?

    This transmission was bought through Adbaced Adapters. They welded a tab to the bell housing to attach the slave cylinder too.

    Maybe i just need to call a advanced Adapters and talk to them.
     
  4. Aug 25, 2018
    tarry99

    tarry99 Member Sponsor

    Northern California
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    Not trying to change your mind on going mechanical linkage..............But, You probably have the wrong match of bore size at the clutch master on the firewall or maybe too small at the slave?......how hard is the pedal to push down? .................Hydraulic cylinders are all about pushing oil & volume determined by the bore size from point A to B.............if the bores are equal then the ratio is 1:1 in travel............If the bore at the firewall is larger than the slave the travel of the smaller bore will be greater.........Most of those in that vintage had a 13/16" or 7/8" bore at the firewall and a little smaller bore like a 3/4" at the slave........Novak makes a 2" travel slave.........that will never bottom out...
     
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  5. Aug 25, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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    Thank Tarry. I don’t know what bore size i have in either location. All i know is that i have whatever is stock for the ‘84. At least I’m sure of that for the slave cylinder. I’ve bought so many of them.

    It’s possible that the master cylinder is a different kind.

    How would i go about determining that?

    I think I’ve looked into that thing from Novak before. May have to try it again.

    Regarding clutch pedal pressure it’s very easy to press.
     
  6. Aug 25, 2018
    tarry99

    tarry99 Member Sponsor

    Northern California
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    The only way would be to get a part number off of it although sometimes the size is just cast into the body somewhere........if you know the size of the slave , and you are happy with the pedal pressure then I would call Novak and tell them about your clutch system...........most of the normal OEM slave cylinders I've seen only have travel around 1.250" .......that's why I like Novaks slave at 2"....not a cheap part , Billet aluminum but they are quality and rebuildable....Hydraulic Clutch Slave Retrofit Kit for Chevrolet Bellhousings
     
  7. Aug 25, 2018
    45es

    45es Sponsor Sponsor

    Naches, WA
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    The stock clutch slave cylinder has a 7/8" bore. The stock clutch master cylinder has a bore of 13/16". I don't know the length of either cylinders travel. The ratio of smaller bore MC to slave cylinder in itself helps explain the soft or easy clutch. Sense the factory usually matches the cylinders well with respect to travel, I suspect someone may have changes the master cylinder to something other than stock causing the slave cylinder to hyper extend or possibly the overall length of the existing clutch fork may be slightly longer than the factory fork. Tarry's suggestion of a different slave cylinder may be to easiest remedy.
     
  8. Aug 25, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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    I’ll give Novak a call on Monday. I have an email from them from a couple years ago when i had the same problem. Thanks for your help.
     
  9. Aug 26, 2018
    Norcal69

    Norcal69 Member

    Cottonwood, Ca
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    I’m assuming that this is the older nv4500 with the external slave. I would source a stock gm master from that years trans and adapt it to work with your current pedal assembly. Should be cheap and easy.
     
  10. Aug 27, 2018
    John A. Shows

    John A. Shows Comic Relief Sponsor

    Mendenhall...
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    I’ve spoken with a fella at Novak. Believe it or not i talked to them about the same thing over five years ago. Damn i need to either drive this Jeep more or just sell it. But...i have to fix this problem before i can do either.
     
  11. Aug 27, 2018
    tarry99

    tarry99 Member Sponsor

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    Ohh how time fly's..................... And there suggestion was?
     
  12. Aug 27, 2018
    Norcal69

    Norcal69 Member

    Cottonwood, Ca
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    I am only speaking from experience.:D I installed a nv4500 in my 99 Tahoe in place of the 4l60.
    I'm sure that it couldn't be too hard to use a stock master, hydraulic line and slave cylinder.
     

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