Advice needed: Driveterrain noise - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 5 Old 09-30-2013, 09:44 PM Thread Starter
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Advice needed: Driveterrain noise

Recently I have noticed a high pitched harmonic whine at 70mph. As soon as ilet off the gas it goes away. It is def tied to vehicle speed and not engine speed. I noticed last week when working on the Jeep that the rear driveshaft is slinging grease, however i asked the advice of a mechanic next to my work that works on truck/humvees and he said it sounded more like a ring/pinion issue.

Any thoughts? More important what would be the damage in time/hours? Im hoping for just the DS as that is a simple/cheapish upgrade.

Thank you for your help!!


>> I have the Rancho 4" sport lift on stock DS and unfortuanly rarley go offroad

2009, 2 Door X, Rancho 4" Sport Lift w/ 9000xl shocks, 35" Firestone Destination MTR on Spidertrax spacers Bulldog Front Bumper w/XRC8 Winch, LoD Rear Bumper, FinishLineWest Rock Sliders, 5.13 G2's, ARB Rear diff cover, LineX'd tub, JL Clean Sweep, JL 900/5 Amp, JL C5 components in front, JL Marine MX-770's in soundbar, JL FS-110 Marine sub, Tuffy security deck, HID's in Cibie's, Piaa 520s
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Last edited by DanNEBTD; 10-01-2013 at 04:38 AM.
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post #2 of 5 Old 09-30-2013, 10:22 PM
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Your axle is slinging grease?

Pull the drive shaft and see if that fixes it.


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post #3 of 5 Old 10-01-2013, 04:35 AM Thread Starter
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Quote:
Originally Posted by Abacabb View Post
Your axle is slinging grease?

Pull the drive shaft and see if that fixes it.
Sorry for not clarifying, it is the rear driveshaft that is slinging grease on the Tcase side. .


>> fixed OP

2009, 2 Door X, Rancho 4" Sport Lift w/ 9000xl shocks, 35" Firestone Destination MTR on Spidertrax spacers Bulldog Front Bumper w/XRC8 Winch, LoD Rear Bumper, FinishLineWest Rock Sliders, 5.13 G2's, ARB Rear diff cover, LineX'd tub, JL Clean Sweep, JL 900/5 Amp, JL C5 components in front, JL Marine MX-770's in soundbar, JL FS-110 Marine sub, Tuffy security deck, HID's in Cibie's, Piaa 520s
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Last edited by DanNEBTD; 10-01-2013 at 04:38 AM.
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post #4 of 5 Old 10-01-2013, 08:03 PM
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Driveterrain issue...lol. This site is all about solving issues when driving on terrain. There is also a lot of "drivetrain" experience here too. Hopefully someone can help you out. Good luck.


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post #5 of 5 Old 10-01-2013, 08:40 PM
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Rear shaft CV boot (on shaft, closest to t-case side) is toast, grease has all spun out and the joint is probably dry most likely. Try squirting either moly grease up into the CV joint with a needle or just spray the shit out of it with penetrating lube overnight. I realize this won't fix the problem but it will at least allow you to test it the next day to see if it's any better. Remember though, you really have to get the lube up into the CV joint for this to be effective. It's not really that easy but work at it for best results. If it's gone then you know it's the CV joint. If not move on to next item. Try this first....

Originally Posted by van7559
I can bury my pinky in the rear, and just barley feel it, the front is a little easier, but still seems low to me!

I fist fuck life with a nuclear powered pneumatic fuck hammer for 60, 70 hrs a week...
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