MancheKid86 Posted March 23, 2009 Share Posted March 23, 2009 i lowered the back of my transmission today, because my slave cyl wasnt engaging my clutch, found out that wasnt the problem, the clutchplate in the bellhousing is 'locked', i need help with that, shouldnt there be a plate that the slave cyl pushrod is supposed to engage? or what piece engages it? Link to comment Share on other sites More sharing options...
Eagle Posted March 23, 2009 Share Posted March 23, 2009 The two major parts of a clutch are the disc (that's the thin, flat part with the fibrous lining material on it) and the pressure plate. The pressure plate is the larger part with a round metal plate, a housing, a bunch of coil springs, and the fingers to make the plate move in the housing. The release bearing presses the fingers into the pressure plate housing, which pulls the plate away from contact with the disc. We need more info about your truck and exactly what you found, because some years of the Comanche used an external slave (which used an arm to connect to the release bearing) and other years used an internal slave cylinder that is integral with the release bearing. Link to comment Share on other sites More sharing options...
Geonovast Posted March 23, 2009 Share Posted March 23, 2009 Yup, with the tranny out you shouldn't be able to move the clutch disc at all, since pushing in the clutch disengages the connection. Tip: Put the year and basic specs of your truck (longbed or shortbed, motor, trans, 4wd or 2wd) in your signature, so we can use it for reference when you ask a question. :thumbsup: Link to comment Share on other sites More sharing options...
dasbulliwagen Posted March 23, 2009 Share Posted March 23, 2009 Sounds like the release bearing arm is gone or out of place, maybe broken in half and laying inside the belhousing? At any rate, the trans will have to come out of the vehicle to correct a problem like that. The pushrod in the slave cyl engages the release bearing arm ( If thats the word for it). The other end of the arm is seated in the other side of the bellhousing as a leverage point. Youll have to pull the tranny to see what happened. Sorry :eek: Link to comment Share on other sites More sharing options...
Geonovast Posted March 23, 2009 Share Posted March 23, 2009 Sounds like the release bearing arm is gone or out of place, maybe broken in half and laying inside the belhousing? At any rate, the trans will have to come out of the vehicle to correct a problem like that. The pushrod in the slave cyl engages the release bearing arm ( If thats the word for it). The other end of the arm is seated in the other side of the bellhousing as a leverage point. Youll have to pull the tranny to see what happened. Sorry :eek: That's if he's got an external slave cylinder. IIRC the ONLY year the external was stock on an MJ was 86. Jeep didn't go back to the external setup until mid-93. Link to comment Share on other sites More sharing options...
Eagle Posted March 23, 2009 Share Posted March 23, 2009 The original post also didn't sound like he actually removed the transmission to see the clutch. It said he dropped the back end of the tranny. We really need a lot more information. Link to comment Share on other sites More sharing options...
dakal Posted March 23, 2009 Share Posted March 23, 2009 if you were not able to engage the clutch? had it been sitting awhile? with mine, the clutch wouldn't engage, so with the motor off i put it in gear, started it up and it broke the rust loose. happened twice, did it twice, now that i am driving it more the clutch and pressure plate haven't rusted together any more. :thumbsup: Link to comment Share on other sites More sharing options...
MancheKid86 Posted March 24, 2009 Author Share Posted March 24, 2009 well, i have an 86 manche, 2wd, 4 cyl, 2.5l with an external slave cylender, i have added brandnew clutch plate, preassure plate and slave cyl, since all of them were oem and died at the same time. when i was putting the clutch in, i had to go so a person working on my truck with me put the throwout bearing in, could he have not put the bearing all the way in to engage the plate the that slave cyls rod would hit? Link to comment Share on other sites More sharing options...
Eagle Posted March 24, 2009 Share Posted March 24, 2009 The slave cylinder doesn't hit a plate. I haven't worked on any XJs or MJs with the external slave (yet) but my recollection from the exploded parts views is that there's a pivoting arm that's supposed to connect the slave to the release (throwout) bearing. Is it possible that your mechanic didn't properly position the arm on the release bearing? It's also possible he didn't use the correct release bearing. It's more than a little difficult to know what he did wrong from a distance. Link to comment Share on other sites More sharing options...
MancheKid86 Posted March 24, 2009 Author Share Posted March 24, 2009 it is the proper throwout bearing, i ordered the kit for everything, what i think he done was sliped on the throwout bearing, but didnt slide it down all the way to engage the pivot arm? well anyways i need to drop my transmission again, have any suggestions on howto drop it, and get all 8 bolts out? because last time i dropped my transmission was in school on a lift with a transmission jack Link to comment Share on other sites More sharing options...
Geonovast Posted March 24, 2009 Share Posted March 24, 2009 Pulling the trans off a 2.5 is ridiculously easy. You can get at all 6 bolts that hold it on, and they're all the same size. Should be 18mm. Are you SURE you got the correct bearing? The proper bearing clips onto the throwout arm. When I put the 86 trans in my truck and ordered the kit for an 86 2.5, it came with the wrong bearing. I had to order the 2.8 kit to get the right bearing for some reason. If that's not the case, another possibility is the slave cylinder was not bled properly. Those slave cylinders have to be bled when they're not attached to the bellhousing, and clamped so they stay completely compressed. If that wasn't done, you could have air in the cylinder and that would cause it to not disengage the clutch. Another thing. There should be a little plastic tip at the end of the pushrod for the slave cylinder. If that's not there, it may not push it far enough to disengage since it's a new clutch. edit: The one you need looks like this Also, another tip, which is what I did when I put mine in. Take the bellhousing off the transmission, and bolt the bellhousing/clutch assembly into the truck without the tranny. Put the alignment tool in the clutch, and then you can test to see if everything's working properly, without having the transmission in there. Link to comment Share on other sites More sharing options...
dakal Posted March 24, 2009 Share Posted March 24, 2009 great tip. i'll remember that when i change my clutch :brows: Link to comment Share on other sites More sharing options...
MancheKid86 Posted March 25, 2009 Author Share Posted March 25, 2009 If that's not the case, another possibility is the slave cylinder was not bled properly. Those slave cylinders have to be bled when they're not attached to the bellhousing, and clamped so they stay completely compressed. If that wasn't done, you could have air in the cylinder and that would cause it to not disengage the clutch. thank you for this bit of information, will do this tomorow asap, will post results Link to comment Share on other sites More sharing options...
MancheKid86 Posted April 8, 2009 Author Share Posted April 8, 2009 no luck with slave cyl, bled it completley, had tons of preasure, then i re-mount it, all the preasure is lost, found out that my real wheel brake cylendar was blown, so i bled again when i picked up the part and it still did the same thing? you were saying i can take my transmission off without taking my bellhousing off? can you take a pic or something that shows where to take it apart, and then what to do? Link to comment Share on other sites More sharing options...
Eagle Posted April 8, 2009 Share Posted April 8, 2009 no luck with slave cyl,you were saying i can take my transmission off without taking my bellhousing off? can you take a pic or something that shows where to take it apart, and then what to do? That's not exactly what he said. The bolts that hold the tranny to the bellhousing are accessed from inside the bellhousing. You can't remove the tranny without removing the bellhousing. What he meant (I think) was that you can remove the bellhousing from the tranny and put it on the engine temporarily to ensure that everything is lined up. Once that's done, you have to take the bellhousing off the engine and reattach it to the transmission before you put everything back together. Link to comment Share on other sites More sharing options...
MancheKid86 Posted April 8, 2009 Author Share Posted April 8, 2009 thanks for clarifying that, another question, what would be the easiest way to drop the transmission? all i have is the jack that came with the truck, plus one out of an astro van, and 2 3.5 ton jack stands, also my neighbour was saying something about the fingers of the clutch release plate maybe have to be adjusted? when he done his clutch the fingers were set to factory settings but werent enough to release the clutch, also a few got bent as i was putting the transmission in, could that have anything to do with it? Link to comment Share on other sites More sharing options...
MancheKid86 Posted April 10, 2009 Author Share Posted April 10, 2009 bump Link to comment Share on other sites More sharing options...
Wildman Posted April 10, 2009 Share Posted April 10, 2009 I know........I seen this last night :roll: Well......your arrangement of tools and equipment is......well........lacking a few things. What your really need is something like This. You can get by with One of these. I didn't see if your 2wd or 4wd, but the tranny it's self weights about 65 pounds, and with the X-case about 110 pounds. Plus you need to "hold" it in place to line it up and get the bolts started and tighten. Once you take off the tranny cross member, the tranny will drop like a lead anchor plus the engine will drop down with it. You need to support the tranny in fact, lift it up a bit to take the cross member off, and then unbolt it from the engine, and you should have some support on the rear of the engine, other wise, you can run the fan blades into the radiator. I guest no one answered your question, cause, the problem your having to begin with, and the lack of tools and equipment, is this something you really want to handle :dunno: here's a "movie" for you to watch on how a clutch works.....http://www.youtube.com/watch?v=F0njT2FY ... annel_page And.........here's kind of a how to......http://www.automedia.com/Clutch_Replace ... 020701cd/1 One pointer.......Check your flywheel, if it has hot spots, replace it, you can not get a 4.0 flywheel re-surfaced, it has a concave grind to it, and is not machinable. Link to comment Share on other sites More sharing options...
MancheKid86 Posted April 10, 2009 Author Share Posted April 10, 2009 i have dropped the trans a few times now :D i can borrow a 3.5 ton jack, ill see if i can figure out a way to mount my trans to the jack, will post with pictures and results Link to comment Share on other sites More sharing options...
Redramman Posted April 10, 2009 Share Posted April 10, 2009 We used a floor jack (the kind with wheels) and put a small trailer 13"wheel and tire on the jacks saddle to cradle the trans a bit and to gain more height ,a tie down strap might help.Then we lowerd it down enough to slide it onto a creeper and rolled it out on that. I was wondering if the external slave has an adjustment? that could help the problem. Is it posible to put throw out bearing in backwards? or like someone said the fork is not in the right groove or position?. Link to comment Share on other sites More sharing options...
Eagle Posted April 11, 2009 Share Posted April 11, 2009 Harbor Freight Tools sells a manually operated transmission jack for around 50 clams. I wouldn't buy it if I ran a shop but for the weekend warriors like us ... let's just say it beats all heck out of bench pressing a transmission while lying on a cold concrete floor (or a gravel driveway) with about 2.79 inches of clearance above your nose. Don't forget -- getting the tranny OUT is not half the problem. It's barely a quarter. Coming out is easy -- to put it back in you have to align the shaft on the tranny with the clutch release bearing and the pilot bearing or bushing in the end of the crankshaft. If you don't get things lined up and try to force it -- well, that's how you bend clutch fingers. Oops -- http://www.harborfreight.com/cpi/ctaf/d ... mber=39178 Looks like the price went up since I bought mine. Still money well spent, IMHO. Link to comment Share on other sites More sharing options...
dakal Posted April 11, 2009 Share Posted April 11, 2009 friend of mine right now is replacing the clutch in his toyota. he bought one and he is on disability. he says he really glad he did. Link to comment Share on other sites More sharing options...
Wildman Posted April 11, 2009 Share Posted April 11, 2009 That's the jack I posted in the first "This" HF has that one on sale for $59 at times :brows: I've used mine for trannys, axles, and even supporting doors, it can do more than just one job, and with a 1/2" speed wrench, becomes the third hand at times. I think Eagle made a good point, with trying to get the tranny back in, not aligned and forcing it, could very well have bent the fingers on the presser plate :hmm: Link to comment Share on other sites More sharing options...
Redramman Posted April 11, 2009 Share Posted April 11, 2009 Some places sell an adapter or replacement saddle for floor jack that converts it to trans jack for about 40-50$. Link to comment Share on other sites More sharing options...
Wildman Posted April 11, 2009 Share Posted April 11, 2009 Some places sell an adapter or replacement saddle for floor jack that converts it to trans jack for about 40-50$. Yea, This but, for a few $$ more, I like to keep the floor jack freed up for supporting the engine :brows: Link to comment Share on other sites More sharing options...
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