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D 18 growl

Discussion in 'Early CJ5 and CJ6 Tech' started by bullfrog, Jul 10, 2006.

  1. Jul 10, 2006
    bullfrog

    bullfrog New Member

    Joined:
    Jun 6, 2006
    Messages:
    4
    hey there guys, I have a question about my D 18 growling when I let off the gas while travleing at hiway speed. It only growls when i'm in between being under power and when the engine is holding me back and slowing down. I checked underneath and can feel some moevment in the e-brake hub or output shaft, seems to be more than the .004-.006 factory spec. but I haven't actually checked it with an indicator. Before I take it apart I'd like to know is this a common problem for the d-18 or did somebody before me just get the shimming wrong. Also what kind of suprises am I likely to find in there. I've had the jeep only for a short time. Thanks!! Steven
     
    bullfrog, Jul 10, 2006
    #1
  2. Jul 10, 2006
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
    Messages:
    5,349
    There are 2 basic things that can go wrong with the d18. Bearing preload being out either from being improperly set, worn bearings or loose bolts. The other is the needle bearings and wear on the intermediate gear shaft. Thats the shaft you can see from the back of the transfercase thats in between the output shaft and the small (5") round pto cover.
     
    Mcruff, Jul 10, 2006
    #2
  3. Jul 10, 2006
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
    Joined:
    Sep 22, 2002
    Messages:
    4,585
    Is it a differnt sound than before it was rebuilt? The Dana 18 is "noisy", you hear alot of gear whine with them. The later Dana 20 was suposed to be the "quiet" Transfercase.
     
    DanStew, Jul 10, 2006
    #3
  4. Jul 10, 2006
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,126
    Steven, I recommend that you read Rick Stiver's D18 rebuild guide available here-

    http://www.willystech.com/wt/Model18TCase/Model18TransferCase.html

    He has good info on dissasemby & what to check in your case. I've just finished mine (more or less) using the guide, seems to be a few bugs with the assembly phase instructions but nothing catastrophicly wrong. I've got pics of my rebuild here-

    http://www.tantel.ca/Images/The Sludge Pile/Section_K_Transfer Case/

    Any pic labled "Rebuild" with an "A" number after it refers to the appropriate section of Rick's guide.

    If you have any questions feel free to ask :).

    H.
     
    Howard Eisenhauer, Jul 10, 2006
    #4
  5. Jul 10, 2006
    Hansh

    Hansh Going Mobile

    SE Wisconsin
    Joined:
    Dec 7, 2004
    Messages:
    425
    Have you checked the oil in the TC and Diff?
     
    Hansh, Jul 10, 2006
    #5
  6. Jul 11, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    Another source of growl can be misalignment of the drive train due to bad motor mounts and tranny mount. This of course leads to output bearing wear...
    I've seen cases where new mounts solved the growl, if caught early enough.
     
    lynn, Jul 11, 2006
    #6
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