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Thread: driveline vibration craziness

  1. #1
    HAVOC 13 jungsoo726's Avatar
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    Default driveline vibration craziness

    hey guys, i recently added a Dana 44 with detroit locker and put 4.88 in front and rear on the 44 and stock dana 30.

    first off, ive noticed large clanking sounds when shifting gears. ive been told it's because of the locker. is this true?

    also... recently as of yesterday, ive noticed horrible vibrations when driving between 0-50mph. it's really annoying and it's not like its a soft vibration. it shakes the whole truck.

    any thoughts? what could it be? ive got the SYE and longer drive shafts. so i dont think it's that. could the locker be f'in up?
    2006 TJ 4.0L/6SPD. 6 inch Teraflex, 37x14.5x15 Toyo Open Country M/Ts, SYE, Warn rock Crawler bumpers, Dana 30 Front with 4.88 gears, Dana 44 rear with Detroit Locker, US Alloy 30 Spline, 4.88 gears. seat covers, Alpine stereo with 4 channel amp, KC Daylighter Offroad lights, Hi Lift jack on hood, Volant Intake, Magnaflow exhaust (dumped), few other cosmetic goodies.

  2. #2
    No Mas Jeepalonie
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    Default

    Clanks and clunks are the locker unloading. Thats normal. The shake and shimmy could be worn parts or bad driveline angles, even though you have an SYE doesn't mean its the end all be all. Take a few pictures of your drive shaft at both ends and post them. Also check torques on all the major front end parts. Also check bushings for wear, check ball joints, ujoints, and bearings for wear. Probably the most important part and most common cause check you front and rear track bars for wear and propper adjustment
    Jeepless Again

    2008 Ford F150

  3. #3
    Land Squid Jeffb_79's Avatar
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    Default

    You've got an sye, but what are your actual drive line angles?
    Here's how to check:
    http://www.stu-offroad.com/axle/pinion/pinion-1.htm

    If you're drive line angles appear good. Next I'd remove the front driveshaft, drive around and see if the vibes are still present. If not, it's something in your front driveline... be it a poorly balanced shaft, u joints, centering ball, etc..
    If so, put the front shaft in and remove the rear. Drive around and see if the vibes are still present.

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