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Clutch

Discussion in 'Early CJ5 and CJ6 Tech' started by alleycat3677, Mar 11, 2016.

  1. 1960willyscj5

    1960willyscj5 Well-Known Member

    I would think it would slip worse in first or reverse, than second or third. I've never had to replace one, yet.
     
  2. nickmil

    nickmil In mothballs.

    More load on the engine and clutch in a higher gear. More mechanical advantage in a lower gear so less likely to slip.
     
  3. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    That's been my experience exactly.
     
  4. Focker

    Focker That's a terrible idea...What time? Staff Member

    What did you do?
     
  5. Focker

    Focker That's a terrible idea...What time? Staff Member

    Is a throw out bearing what RA calls a release bearing?
     
  6. nickmil

    nickmil In mothballs.

    Release bearing is the correct terminology, but throw out bearing is the common term. So yes, same thing.
     
    cookieman and Focker like this.
  7. chris423

    chris423 Sponsor

    So does every release bearing have a spring on it ?????
     
  8. Glenn

    Glenn Kinda grumpy old man Staff Member

    There definitely should be one on yours.
     
  9. AKCJ

    AKCJ Active Member

    I did like Pete and just replaced the disk and throw out bearing. Plus a new pilot bearing in the flywheel. That was more than 10 years ago.
     
  10. Focker

    Focker That's a terrible idea...What time? Staff Member

    Just discovered on RockAuto's site that if you hover over the part it, a pop window will appear listing alternative names...That's cool.

    So I'm dumb...You can get a release bearing that looks like what I have for $5.12 or $43.79. o_O

    Jeep/1971/CJ5/3.7L 225cid V6/Transmission-Manual/Clutch Release Bearing
     
  11. nickmil

    nickmil In mothballs.

    Just be aware of the brand you are purchasing. The quality can be vastly different which is why some are more and some less. And then some people just think their stuff is gold.
    I look at it this way, I don't like doing jobs twice if it can be avoided. Especially large and costly jobs. Being as my paycheck depends on a job NOT coming back I try to do it "right" the first time.
    If you have more time and labor available to you and don't mind doing a job multiple times then by all means take shortcuts. Tanstaafl.
     
  12. alleycat3677

    alleycat3677 Member

    Thanks guys. I've come up with an affordable solution. I will buy the whole kit. In my town there is a Job Corps. For those that don't know,it's a trade school for basically troubled youth. I've heard really good things about the auto shop program. Free labor,just buy parts. The teachers really supervise and won't let a job be done half assed. Big bonus for me is a cool old jeep will be interesting and exciting for the students. Sounds like a win win to me!!!!
     
  13. eti engineer

    eti engineer Member

    That's 100% of what I paid for my jeep...
     
  14. a3dhunter

    a3dhunter New Member


    I'm going to be putting a 225 into my old jeep with the sm420 as well, can you give as much info as possible on the parts you used? Part numbers? Thanks.
     
  15. 47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    The clutch kit I got from rock auto is no longer carried by them, but the same one but maybe better is LUK04021 Its a 10.5" chevy clutch. The car i used to search was a 1970 chevelle.

    One big problem I had ,and some others have as well, is since the dauntless flywheel is thicker than a normal chevy one the splines on the input shaft for the SM420 are not cut far enough back. What I mean is the clutch friction disk/driven disk hub will be forced into the flywheel by the input shaft and not release.

    What I had to do is machine a chamfer on the interior of the hub to allow the disk to have a bit of room between the hub and the end of the input shaft splines. Once I did that it worked fine.
     
  16. alleycat3677

    alleycat3677 Member

    Just ordered my clutch. Should be a week to come!!!
     
  17. alleycat3677

    alleycat3677 Member

    Clutch is in and she's going to Job Corps on wed. They are also throwing a rear seat on the transfer case for me. Gotta love free labor and no mor pooling under the jeep!!!
     
  18. alleycat3677

    alleycat3677 Member

    So I bought a Sachs clutch kit from Rockauto. Installed fine and come to find out the throw out bearing is too short. WTH? I get zero clutch movement. Any suggestions? Thanks
     
  19. tarry99

    tarry99 Member

    Did you match up the parts from the old to the new? Assuming you have the correct replacement clutch & pressure plate............It should work.......are you sure the bearing was properly attached to the fork? and the fork was properly attached to the ball in the bell housing?............they do make a couple of different bearings and Novak makes an adjustable throughout bearing housing also.......but check the obvious first.
     
  20. alleycat3677

    alleycat3677 Member

    I'm having a place that teaches youth how to become mechanics do the work. He said all the parts matched. The instructor is an old guy that knows what he's doing. I'm just curious if there were different lengths made. Every one I look at online doesn't give a length. Also,I don't know much about these,can you shim it somehow? The one I have is 1 43/64 long. He said a 2 inch would do the trick. I'm lost on this.