1. #1
    -tumbleweed-'s Avatar
    -tumbleweed- is offline Junior Member
    Join Date
    Mar 2009
    Posts
    3

    Driveline Vibration

    I have really bad driveline vibration between 30 and 50 mph. I replaced the u-joints and it didn't help (but they needed it regardless). The vibration is only noticeable when I accelerate or decelerate. If I'm driving between 30 and 50 with the vibration and throw it into neutral, the vibration quits entirely. Is my driveline just off balance? Could something be warped? What is the best way to tell?

    I did break my spider gears a few months back, but I don't recall if the time frames with this vibration and that incident matched. Other than that, it has just been regular driving.

    What are your suggestions for my next step?

    Thanks for any help.

    ('95 YJ. Everything stock.)

  2. #2
    Utah_jeepster's Avatar
    Utah_jeepster is offline Moderator
    Join Date
    Jun 2003
    Location
    Tempe, Arizona
    Posts
    3,422

    Re: Driveline Vibration

    No matter what, its going to cost to find it. Any drive line shop will test your drive shaft for 25$ or so. Call around for the best price there.

    But what your describing is what happened to me http://www.jeepz.com/forum/general-c...ide-gears.html (Vibration on the coast side of the gears)

    But if you didn't think you messed up the rear diff, I would start with the drive line balance first. Its the cheapest.

    blatant jokessubliminal sarcasmsexual innuendo

  3. #3
    SteelHeadz's Avatar
    SteelHeadz is offline Moderator
    Join Date
    Oct 2008
    Location
    Kerrville, TX
    Posts
    6,040

    Re: Driveline Vibration

    IMO, it sounds more like an issue with the T.case or rear axle. From whats been described, throwing the gear into neutral makes the vibration quit, tells me that the issue is a torque related vibration. If it's a driveline balance issue then the symptoms would be the same as having an out of balance wheel, the vibration will occur at a certain speed regardless of torque. I could be wrong. Often times, vibration produces a low humming sound. If you could isolate the sound and associate it with the vibration, then your one step closer to the source of the problem.
    Confucious says: Don't eat the snow where the huskies go!

  4. #4
    Turbogus's Avatar
    Turbogus is offline Senior Member
    Join Date
    Nov 2005
    Location
    Albany~town, Oregon
    Posts
    899

    Re: Driveline Vibration

    Ahhh SteelHeadz IS the wise sage.
    Quick fixes are so named for how long they stay fixed.
    If you run out of gas, no matter which way you decide to push, the closest gas station will always be uphill and in the other direction. Corollary: The likelihood of running out increases when all of the nearby gas stations are closed.
    The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep.
    We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch).

  5. #5
    jackmac's Avatar
    jackmac is offline Junior Member
    Join Date
    Jun 2009
    Posts
    2

    Re: Driveline Vibration

    I am also having a similar situation. I have a 97 that just started the driveline vibration. I have checked many things. I have replaced my front axle u-joints, ball joints and varified that my rear end did not have too much play. I am still having some serious vibration under torque while accelerating and decelerating. I also have noticed that if I put it in 4H while experiencing the vibration it goes away. I feel the vibration all over but mainly in the shifter, steering wheel and accelerator. Any thoughts?

  6. #6
    -tumbleweed-'s Avatar
    -tumbleweed- is offline Junior Member
    Join Date
    Mar 2009
    Posts
    3

    Re: Driveline Vibration

    Quote Originally Posted by jackmac View Post
    I am also having a similar situation. I have a 97 that just started the driveline vibration. I have checked many things. I have replaced my front axle u-joints, ball joints and varified that my rear end did not have too much play. I am still having some serious vibration under torque while accelerating and decelerating. I also have noticed that if I put it in 4H while experiencing the vibration it goes away. I feel the vibration all over but mainly in the shifter, steering wheel and accelerator. Any thoughts?
    It may be something in your transfer case. My situation is different in that I cannot feel the vibration in the shifter. I think my pinion gear shaft may be bent or warped. I am replacing the ring, pinion, and differential this week (it needs a new diff. anyway). I'll let you know how it goes or if it helps.

  7. #7
    Join Date
    May 2009
    Location
    Las Vegas, NV.
    Posts
    52

    Re: Driveline Vibration

    I had something like that happen to me a few months ago and it costed me dearly. Come to find out it was my knocks hitting on my drive shaft. My skid plate for the trans. got bent when climbing rocks. It threw every thing off and caused vibration and grinding noises. If you have a lift you better get a 2nd job because it get expensive. Good luck and it's worth every penny !

  8. #8
    kelerbel's Avatar
    kelerbel is offline Junior Member
    Join Date
    May 2009
    Location
    Fort Collins Co
    Posts
    3

    Re: Driveline Vibration

    I have a similar issue...when I accelerate and the RPMs are pretty high (don't have a tach so not sure) there is a loud vibration that comes from the front of the truck...any ideas?!

  9. #9
    jackmac's Avatar
    jackmac is offline Junior Member
    Join Date
    Jun 2009
    Posts
    2

    Re: Driveline Vibration

    I mis-spoke earlier I do not feel it in the shifter just in the steering wheel and dash.

  10. #10
    dmille4.6's Avatar
    dmille4.6 is offline Member
    Join Date
    Mar 2009
    Location
    Knoxville, TN
    Posts
    70

    Re: Driveline Vibration

    i agree with steal. if you can throw it into neutral and it goes away. its got to be in transfer case or trans. the diff and driveshaft are always rotating so it should always vibrate if its one of those.
    2002 TJ 6in Fabtech long arm Lift 35x12.50 pro comp xt mts arbs front and rear tire inflation kit arb snorkel olympic bumpers mile marker 9500 super 30 and 35s yukon 4.10s SYE tom woods driveshaft

  11. #11
    -tumbleweed-'s Avatar
    -tumbleweed- is offline Junior Member
    Join Date
    Mar 2009
    Posts
    3

    Re: Driveline Vibration

    I finally broke down and took my YJ into a local transmission guy to get this vibration problem fixed. He discovered that my axle shafts are warped. At first, this didn't make much sense that this would cause a drivetrain-speed vibration and only do so under torque, but it turns out that when the system is torqued that things tighten up and vibrations are noticed more due to less play in the system. Also, with the shaft bent, you would notice a vibration every half turn which explains the higher frequency vibration.... Apparently, this is fairly common with jeeps.

    So if you are having similar vibration problems, take your axles out and roll them across a flat surface to check for wobling. The mechanic said the wobling was pretty noticable, so it should be fairly obvious when you check it.

    Hope this helps.

    P.S. I haven't got the jeep back from the shop yet, but he was pretty confident that this would fix the problem.

  12. #12
    buckshot500's Avatar
    buckshot500 is offline Senior Member
    Join Date
    Jun 2009
    Location
    Carolina
    Posts
    217

    Re: Driveline Vibration

    Bent shafts can be straightened with an arbor press, some "V" blocks & a dial indicator. Oh, and a healthy shot of patience.
    Forums/CORF Carolina's & surrounding states.
    Forums/CCOR Eastern Carolina's.

    I have more redneck mods than you!
    1990 YJ 4.2L AX-15 on board 220 amp alternator welder, York OBA with rear bumper air tank, Hitch mount front or rear XRC8, Junkyard tube doors, MC2100, TeamRush ign., 60" Hi-lift w/Jackmate, Homebrew cage add-ons, Homemade 1/4 ton trail rack, removable hood-windshield-tailgate, soda bottle coolant & W/W reservoirs Home built stinger & dual hitch front bumper..............

  13. #13
    dos0711's Avatar
    dos0711 is offline Junior Member
    Join Date
    Apr 2009
    Posts
    5

    Re: Driveline Vibration

    Mine is very strange to me. It vibrates at coast after 50mph. Only in that float between acceleration and deceleration. New SYE, new Woods driveshaft and new motor/tranny mounts. I'm leaning towards transfer case chain or rear end. Suggestions?

Similar Threads

  1. TJ Driveline
    By dad9705 in forum CJ YJ TJ and JK
    Replies: 2
    Last Post: 02-25-2009, 09:07 AM
  2. Driveline help
    By techboy07 in forum CJ YJ TJ and JK
    Replies: 2
    Last Post: 02-15-2008, 04:23 PM
  3. looking for a front driveline for a 84 cj7
    By stan in forum CJ YJ TJ and JK
    Replies: 0
    Last Post: 06-10-2004, 02:27 PM
  4. front driveline HELP
    By stan in forum CJ YJ TJ and JK
    Replies: 1
    Last Post: 05-24-2004, 12:57 PM
  5. Driveline vibration????????????/
    By KEVZTOYZ in forum CJ YJ TJ and JK
    Replies: 2
    Last Post: 11-07-2003, 04:01 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in