I have a mystery noise and for the life of me I can't figure out what is causing it.
It only does it after I have been driving for a few miles. When it's cold there is no noise. Its coming from the passenger rear. It sounds like a thunk thunk thunk, while driving straight, as soon as I turn the noise changes to a grinding sound. When I put it into 4wd the noise stops. It's louder while decerating.
I have pulled the wheel off and the drum looked at the brakes... everything looks fine.
Could this be an axle or wheel bearing?
It's on a 88 GL w/ 235k
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Guest Message by DevFuse
Weird noise from rear end, thunk thunk thunk
Started by
subieman
, Feb 20 2008 12:54 AM
11 replies to this topic
#2
Durania
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Elite Master of the Subaru
- Crossville, TN
Posted 20 February 2008 - 01:00 AM
Did you check and see if the wheel moved when grabbed at the top and bottom?
#3
[HTi]Johnson
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Lifted or Rally? choices.
- Coburg, Or.
Posted 20 February 2008 - 01:15 AM
Drive shaft?
#4
Durania
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Elite Master of the Subaru
- Crossville, TN
Posted 20 February 2008 - 01:58 AM
Johnson']Drive shaft?
Good idea, could be U-joint on it's way out.
#5
subieman
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1000+ Super USER!
- Sparks, NV
Posted 20 February 2008 - 10:17 AM
Good ideas! Keep them coming! 
#6
bratsrus1
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- Selah Washington
Posted 20 February 2008 - 10:21 AM
Hi This is Jerry, your noise is a loose lug nut. It happen to me please check them. Thanks Jerry
#7
desertsubaru
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Subaru Nut
- Gassaway WV
Posted 20 February 2008 - 10:31 AM
Check your rear diff oil?
#8
glkiller
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- Lapine
Posted 20 February 2008 - 01:44 PM
good call on the lug nut, my wife had a wheel fall off after a certain large tire shop changed the tires. if the noise changes very dramatically like that it prob is lug nut. I find most thunks are axles, and most grinds are bearings though if those lugs are tight.
#9
Buddy
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Waas Sappening???
- Stockton
Posted 20 February 2008 - 02:20 PM
could be a bone dry bearing. check them cuz i had the same exact sound and it was a dry bearing. the solution to that is simply repack and ur good to go.
#10
one eye
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I'm A Subaholic
- Mt.Vernon Washington
Posted 20 February 2008 - 05:56 PM
could be a bone dry bearing. check them cuz i had the same exact sound and it was a dry bearing. the solution to that is simply repack and ur good to go.
That's what I think I had one go out in eastern Wa and drove all the way home with a thump thump thump. sounds just like what I had going on.
Jeff
#11
subieman
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Posted 20 February 2008 - 11:25 PM
I think I'm leaning toward the bearing idea. The lug nuts are tight and so is the castle nut (those where the first things I checked)
Just a repack or should I replace the bearing?
Just a repack or should I replace the bearing?
#12
Caboobaroo
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USMB Drunk
- Kirkland
Posted 20 February 2008 - 11:37 PM
Pull the bearings out and check to see if there's any discoloration or marks on them. If there is, replace but if not, repack and try it again. Basically a bearing pack is labor but the bearing replacement is kinda expensive. Did it on my RX and the bearing retailed at like $120:eek:
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