Well, i've finally had it w/ the P.o.s that i bought so its up for sale....obviously losing my shirt as well, and if you wanna get technically...pants and shoes as well lol. Anyways, its an 00xj w/ a brand new RE 3.5" lift w/ jks quicker disco's and 31's....i bought it stock from a first owner and i found out at high speeds there were vibes...i posted and it turned out it was a bent d/s had nooo clue how it happened and couldnt get a hold of the a-hole that sold it to me....anyways... i'm on my way home the other day and all of a sudden i hear a whinning coming from the back end of the jeep....(have to add...my rear axle has a 5 degree shimm for the lift that the "performance jeep shop" installed when doing the SYE and D/S....i was hoping that bad u joints or bearings can make a high pitched whinning sound but if not i'm assuming its the rear end. Fluid is full and clean...dont know what else to check...everything on the d/s looked alright. If it is a blown rear which in my case it probably is...is there any kinda temporary additive i can use to quiet it down a little...i dont hear it till i hit around 40 and then it starts to get quiet when i get past 60...any ideas welcome.
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What else can go wrong....
- Thread starter JeepXJ93
- Start date
TroyAndEddie
NAXJA Forum User
- Location
- Lone Star State
I can only point you in a direction... Last time I heard a whine like that in my YJ, it was the rear diffy gone to hell. We ended up replacing the rear axle. We tried some mechanic in a bottle stuff to no avail.
8Mud
NAXJA Forum User
- Location
- Central Germany
XJ or YJ, I´ve rarley looked in a rear with more than 130,000 miles that didn´t have some play in the carrier bearings.
Transiant noise or vibrations (harmonics) are rarley the rear, most likely a balance issue, either the setup, worn U-joints or bearings.
A Moly gear additive, has quieted down my rear ends a bit, isn´t a cure, but does lessen the noise some.
When trouble shooting, a change in pitch (of the vibration/harmonic) when accelerating, coasting or decelerating and/or a change when going around a corner, tells a story.
I´ve had certain speed harmonics, caused by everthing from a severly rusted drive shaft (balance), front axle (and other) U-joints, loose pinion bearing and transfer bearings and/or bushings.
From the rear, wheel bearings, carrier bearings and worn spider gears. It´s often really hard to tell exactly where the noise is coming from, sound travels through the drivetrain pretty well and it will fool you.
Transiant noise or vibrations (harmonics) are rarley the rear, most likely a balance issue, either the setup, worn U-joints or bearings.
A Moly gear additive, has quieted down my rear ends a bit, isn´t a cure, but does lessen the noise some.
When trouble shooting, a change in pitch (of the vibration/harmonic) when accelerating, coasting or decelerating and/or a change when going around a corner, tells a story.
I´ve had certain speed harmonics, caused by everthing from a severly rusted drive shaft (balance), front axle (and other) U-joints, loose pinion bearing and transfer bearings and/or bushings.
From the rear, wheel bearings, carrier bearings and worn spider gears. It´s often really hard to tell exactly where the noise is coming from, sound travels through the drivetrain pretty well and it will fool you.
rockwerks
NAXJA Forum User
- Location
- Chito Beach Resort, WA
Im guesssing its an 8.25 rear end. they do have alot of play once worn in and tend to be a bit noisy after abouot 10,000 miles. its normal I would bet.
Also How long did you run on the bent DS it could hve damaged the pinion bearing. you can check that by hand just wiggle it if any play sde to side or up and down that is your problem and should have been check at the shop when they installed the other DS
Also How long did you run on the bent DS it could hve damaged the pinion bearing. you can check that by hand just wiggle it if any play sde to side or up and down that is your problem and should have been check at the shop when they installed the other DS
HMMM good thoughts...i dont know how long the a-hole drove it w/ a bent d-shaft..but when i bought it i drove it for about 2 weeks before i lifted it and bought the tom woods d/s thats whats in there now. Along w/ the AA SYE....nothing done up front though and i do still have high speed vibes..thats why i was thinking maybe it has something to do w/ the vibes i've been driving w/??? Can bad u joints in my front d/s cause whinning noises?
MaXJohnson
NAXJA Forum User
- Location
- The Kansas Rockies
JeepXJ93 said:
In other words, will you guys help hide the noise so he can dump this Jeep on some unsuspecting buyer :twak:
- Location
- Westminster, SoCal
Take it to someone that knows their way around jeeps. It might be something ridiculously simple to spot in person while really hard to diagnose on the net. If you can get access to a vehicle lift (where they raise the whole vehicle by somethingother then wheels) it might be worth it to lift it up and go through various wheel speeds while someone else monitors/tracks down the noise from underneath.JeepXJ93 said:
Hiding it? Bad idea.....
Boatwrench
NAXJA Forum User
- Location
- Petaluma, CA
MaXJohnson said:
In other words, will you guys help hide the noise so he can dump this Jeep on some unsuspecting buyer :twak:
Sawdust or ground up walnut shells work real good at dampening the noise from a bad diff. :gag:
ive been screwed 4 times buying used cars...always something internal too...im sick of fixing the F*cking problems...and then selling it to someone and losing more than my shirt. I got screwed when i bought this jeep and apparently my luck is only getting worse...so this time i'm not dumping the money into it before i sell it. Im not looking to screw anyone over, but i figured if the noise wasnt as loud, the problem wouldnt get worse...still noticable though, i just dont want it getting any worse to the point where i have to fix it before i sell it. SO far everyone who has driven it has noticed the noise. I guess i'm just not losing enough of my shirt on the price...its already 2g's below kbb value. I figured if it is a bad rear....there's 2 g's to fix it and then u have a mint xj w/ a brand new 3.5" SF kit w/ a TW d/s and AA SYE w/ jks quicker discos...heavy duty trackbar..and brand new 31" MT's..
- Location
- Westminster, SoCal
Even though you're saying that you don't want anyone to end up in a similar situation as you did the dampening of the noise will do the opposite......JeepXJ93 said:
In regards to the noise you're giving up to easily. If everything else is sound on the vehicle, get the problem looked at and examined by someone that knows what they're doing. Might be as simple as a bad bearing.
Clean Racing
NAXJA Forum User
- Location
- Bellingham, Wa
From what Im hearing in your post. You need to take it to a reputable jeep specialist. It could be pinion bearings causing this noise or something really simple. Things like this are hard to diagnose over the net. By the way it should not cost no 2k to rebuild a diff.... The older Grands had diff issues with the Alum version of the D44, the most ive seen one of those charged to do was 850... If you have a good drive line shop in your area that might be an alternative as well... Don't give up on your jeep just yet, its a machine, and machines are repairable.... best of luck.....
DaffyXJ
NAXJA Member #929
- Location
- southern MD
I have to second the 'don't give up too soon' sentiment. It could be as easy as a wheel bearing.
but with the bent d/s it is most likely a pinion or even the t-case output bearing.
A good indicator for the pinion would be the pinion preload. if it's real loose that would really narrow the search.
Pull the d/s, remove rear tires and spin the yoke. Pinion preload should be between 10-20 ft lbs. That's noticable resistance when turned by hand.
if it's a bearing in the rear end you might even be able to feel/hear it if it is very bad.
Consider the whole rear axle bearings can be rebuilt for under 500 (includes labor) or 150 if you do it yourself. If you're looking to lose over 500 if you sell it, you're bettor off fixing it.
My $.02
but with the bent d/s it is most likely a pinion or even the t-case output bearing.
A good indicator for the pinion would be the pinion preload. if it's real loose that would really narrow the search.
Pull the d/s, remove rear tires and spin the yoke. Pinion preload should be between 10-20 ft lbs. That's noticable resistance when turned by hand.
if it's a bearing in the rear end you might even be able to feel/hear it if it is very bad.
Consider the whole rear axle bearings can be rebuilt for under 500 (includes labor) or 150 if you do it yourself. If you're looking to lose over 500 if you sell it, you're bettor off fixing it.
My $.02
