Intermediate gear markings?

Discussion in 'Flat Fender Tech' started by 1955CJ-5, Dec 3, 2014.

  1. Dec 5, 2014
    45es

    45es Sponsor Sponsor

    Naches, WA
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    Jim, everything you've mentioned does respond to throttle and load. If you recall from 1955CJ-5's #5 post, " It does not seem to be a function of engine or transmission speed but it comes on noticeably at about 38 mph and starts to fade a little by about 45 mph...but it's still there." the sound is responding to speed. Also in the same post, he says running with out the rear drive shaft, the sound was not bad until a load was created with the e-brake. I also think this eliminates the e-brake as a source of the problem.

    1955CJ-5, You said you do not know the history of the jeep prior to purchase and therefore don't know if a previous problem existed. To me, you did imply you were driving the jeep prior to the overdrive installation, post #12 "I would think the noise would change if it originated prior to the OD unit...which was new this spring". So I have to ask, was there a noise prior to the OD install? I think you are probably on the right track to suspect the aftermarket intermediate gear. I would also look closely at the shift fork that rides on the slider gear. Also, what weight gear oil are you using? An interesting problem that I hope we can help resolve.
     
    Last edited: Dec 5, 2014
  2. Dec 5, 2014
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    My experiences have always been bad bearings/gears respond immediately to throttle response, usually with very slight increase or decrease in the throttle, like a bad pinion bearing, or intermediate shaft/bearings.
    I've listened to his video 20+ times....
    It will be interesting the final outcome.
     
  3. Dec 5, 2014
    1955CJ-5

    1955CJ-5 Member

    Boise, Idaho
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    I did drive it a little before the OD was installed. I got it put back together and on the road in October of '13. I put maybe 150 miles on it and then installed the OD. I kept the speeds down while breaking in the engine, and I had NDCC's on it which were louder than the radials that are on it now. I did not notice the noise prior to installing the OD. But there are many things to sort out after a complete dis-assembly and re-assembly.

    I removed the OD once last summer and reinstalled the original mainshaft gear, and I drove it about 300 miles that way. To me the noise was different, maybe not as loud but still there. I sent the OD back to Herm and he inspected it and found nothing wrong.

    I'm using Sta-Lube GL-4, 85-90 weight. I have some GL-1 that will go in next time.......

    The weather is pretty nice today so I will try to get a better video, different speeds and shifting through the gears.

    I really appreciate all your input. I have been trying to resolve this since about April when I started driving it regularly.

    I'll try and run it with the speedo disconnected, and I'll give everything a hard look and see if anything appears to be rubbing. The noise is very consistent and penetrating, so rubbing doesn't sound like the cause but I will try anything...

    I've checked all the transmission cover bolts and none are hitting the transmission itself, and the PTO plate screws are clear. I'll check them again though.

    There are lots of pictures here of the rebuild, if you care to look...

    http://www.cj3apage.com/cgi-bin/yabb2/YaBB.pl?num=1360037699
     
    Last edited: Dec 5, 2014
  4. Dec 5, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

    Apopka, Fl
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    When you say PTO plate screws are you talking about on the back of the OD? I keep listening to the video, that noise is definitely baffling.
     
    Last edited: Dec 5, 2014
  5. Dec 5, 2014
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Yep.
    I would think you'd see something more obvious with the int gear if that were the problem.
     
  6. Dec 5, 2014
    1955CJ-5

    1955CJ-5 Member

    Boise, Idaho
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    The screws were the ones that hold the PTO blanking plate in place.

    I made another video but it is very slow to upload.....more later...
     
  7. Dec 5, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    What type of OD do you have?
     
  8. Dec 5, 2014
    1955CJ-5

    1955CJ-5 Member

    Boise, Idaho
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    I got it from Herm...ATV I think is his company name. It is a front shift.
     
  9. Dec 5, 2014
    1955CJ-5

    1955CJ-5 Member

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    The new video has been "processing" on youtube for a couple of hours....It failed twice on photobucket so with any luck this will eventually be successful...I'll post a link when it's available...
     
  10. Dec 5, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    I'm confused a bit.....you have 2 different sets of pictures of an intermediate gear. The first set shows a gear that looks horrible, chipped, pitted extremely uneven wear. Second set shows a gear that looks good. :?
     
  11. Dec 5, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    Also, the 1st picture in the 1st set looks like a different gear, definitely in better shape.
     
  12. Dec 6, 2014
    1955CJ-5

    1955CJ-5 Member

    Boise, Idaho
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    Sorry about that....my "Intermediate gear" photobucket album originally was to show that nasty chipped "NOS" gear that I bought. It was sealed in a box dated 1950, I installed it and in fewer than forty miles that is how it looked, with a nice little pile of chips in the TC pan to go with it.......you guys don't miss a thing. I'll see if i can't straighten out those albums...
     
  13. Dec 6, 2014
    1955CJ-5

    1955CJ-5 Member

    Boise, Idaho
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    Now for the real entertainment....

    I have a qualifying statement though....The GoPro camera that I used is sealed in a water-tight case, so that means the microphone is in there also....the sound is a little muffled....and i have no idea what that klunking sound is, my first guess is it's the passenger seat hinge as the camera was right next to it...

    https://www.youtube.com/watch?v=pit7I7FiQEU&feature=youtu.be
     
  14. Dec 6, 2014
    1955CJ-5

    1955CJ-5 Member

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    OK, and now the "NOS" junk gear that I bought is by itself in this album, in case you would like to look at it. Don't confuse it with the gear that is presently in use...this one lives in a box now....

    [​IMG]
     
  15. Dec 6, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    The one substantial thing I noticed is it seems to be load associated, as had been mentioned. When you shifted into OD at the latter part of the video the noise stopped during the shift process. I'm really very curious about that bad gear. The fact that on one side of a tooth it was straight and not curved is very strange.
     
  16. Dec 6, 2014
    1955CJ-5

    1955CJ-5 Member

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    Here is the label from the unopened box, and I've added a couple more pictures to the album.

    Some have suggested that since it survived as "NOS" that it probably was in a batch that was rejected, and that should have been scrapped....but it ended up on ebay instead...I still have it of course, and can take pictures if you would like....it has no stamped markings on it at all, just a couple rust spots and now a few chips!

    [​IMG]
     
    Last edited: Dec 6, 2014
  17. Dec 6, 2014
    Glenn

    Glenn Kinda grumpy old man Staff Member Sponsor

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    I agree it should have been rejected. NOS isn't always good, I found that out myself with M-series NOS stuff. Was the intermediate gear that is in there now new when you installed it? What is the timeline for installation of the NOS gear versus the noise showing up? Did you get a noise that made you check the intermediate gear and discovered the damage to it?
     
  18. Dec 6, 2014
    1955CJ-5

    1955CJ-5 Member

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    That bad gear was only in the TC for a day...I pulled it right out because it just sounded wrong from the start, I don't think I ever got up to speed as it sounded so bad...I had been driving the jeep with the noise for some time prior to installing the junk gear in September '14. The gear that is in there now is the gear that came with the jeep...it's the original gear as far as I can tell......but that was the original subject of this thread...

    The TC was rebuilt in Feb of 2013. I drove it some in the fall of 13, installed the OD in January of 14,and then with the higher road speeds the noise became apparent.

    The junk gear was an attempt to remedy the problem.
     
  19. Dec 6, 2014
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    This is becoming too difficult to follow.
    The story seems to change and important details being left out, ie the NOS intermediate gear problem.
    I'm going with excessive gear whine due to miss matched/aftermarket/poor quality gears.
    Maybe obtaining a good, complete, used D18 would be a better option now and just bolt it in as-is and see what you get.
    Good luck with your project.
     
  20. Dec 6, 2014
    nickmil

    nickmil Super Moderator Staff Member Sponsor

    Happy Valley, OR
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    More and more I'm agreeing with Jpflat2a. There may be another damaged gear(s) now due to the other damaged gear. It's also possible another gear was damaged causing at least some of the damage to the NOS gear. If one gear gets damaged it normally is reflected by the gears it drives or drives it.
     

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