post #1 of Old 08-13-2009, 09:36 PM Thread Starter
JackStraw
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hub bearing?

i think the hub bearings in my wife's '99 GC I6 2X4 might be going bad. about 2 months ago i put new firestone tires on her jeep, and they had a little more road noise than her previous set. however, the noise has gotten progressively louder over the last several weeks. it sounds like a howl, like she's got a set of buckshot mudders. the noise gets progressively louder as the speed increases. does this sound like the hub bearings? is there a good way to test to see if it is the hub bearing? if so how difficult a fix is it? any other ideas as to what it might be?


1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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post #2 of Old 08-13-2009, 09:39 PM
99avant
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Does the noise change when turning at all?

The hubs are pretty easy to change. There was a great writeup on this board, a quick search would find it.

|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

If it aint broke, fix it till it is.
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post #3 of Old 08-13-2009, 09:45 PM
gregmondro
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remove the brakes

then there are just 3 13mm 12pt studs holding it in. Pretty easy to replace. Just spray between them and the knuckle with pb blaster and then use a flathead screw driver or something similar to separate them

99 Jeep XJ - NP231, SYE, 4.56's, Rear D44 w/ Detroit SoftLocker and a RockCrusher Diff Cover, 35x12.5 BFG A/Ts, RE 5.5" XD Lift, Skidrow TC Skid, ORT Rear Bumper + Carrier, Rigidco Front Winch Bumper + Steering Box Plate, Milemarker 8000 Winch, Rock Sliders, HD Currie Steering, Control Arm Skids, Goferit Tie Rod Flip Insert, Optima Red Top and a few other goodies...
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post #4 of Old 08-13-2009, 10:04 PM Thread Starter
JackStraw
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i havent heard the noise changing any when turning it, however my wife said today it sounded like the slow whomp of a helicopter blade when she turned one time, but that has only happened once. yeah i replaced the pads and rotors a few months ago, so i dont think this job will be too bad, hopefully not too many stuck nuts.

1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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post #5 of Old 08-13-2009, 10:06 PM
99avant
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You sound like you are on the right track. At that mileage they are about done anyway. Just make sure to get quality replacements.

I just had to replace one that was less than 6 months old from autovalue.

|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

If it aint broke, fix it till it is.
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post #6 of Old 08-14-2009, 05:39 AM Thread Starter
JackStraw
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autozone has timken brand for 90.00 a side, but only has 1 year warranty. is there another brand yall would recommend.

1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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post #7 of Old 08-14-2009, 08:37 AM
99avant
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Timken is good.

I also have had good luck with Napa parts, see what brand they carry

|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

If it aint broke, fix it till it is.
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post #8 of Old 08-14-2009, 12:56 PM
longboy
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Timken is a good brand for bearings.

2006 5.7l WK
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post #9 of Old 08-15-2009, 05:58 AM Thread Starter
JackStraw
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well, unless yall think it could be something else, i guess i'll be changing out the hub bearings monday or tuesday.

1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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post #10 of Old 08-15-2009, 06:48 AM
ratmonkey
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don't forget the 36mm socket and a torque wrench that goes to 175ftlbs.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #11 of Old 08-16-2009, 08:03 PM Thread Starter
JackStraw
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i assume the big hub nut, and the other 3 smaller nuts on the backside are regular threads, righty tighty, lefty loosey.

1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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post #12 of Old 08-16-2009, 08:06 PM
99avant
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Yes, they are regular threads

|94 XJ|4.0|NP231|AW4|8.25 Trac Lock|Lotsa miles - SOLD
|99 WJ|4.7|242HD|Vari-lok|Upcountry+BB|DT8000|Dead as of 10/29/2009

If it aint broke, fix it till it is.
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post #13 of Old 08-17-2009, 09:26 PM Thread Starter
JackStraw
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got it knocked out tonight in a little over an hour. no stuck nuts on either side, easiest job ever done on a jeep. shop down the road wanted $521, took me $192 parts. jeep is much quieter now.

1999 Grand Cherokee 4.0
215,000 mi
Bone Stock other than K&N airfilter
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