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Old 03-08-2011, 11:18 AM   #1
ridin59vette
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Angry Hellppppp!!!!!!

I have just gotten a new noise in my car the other day I moved it during a snow storm and noticed a loud bang. after the bang the car seemed to wobble a bit while moving a few feet, i just chalked it up to the ice and snow in the driveway. after that i have had a very loud deceleration noise, very loud sounds as if a wheel bearing is going to explode in the rear end. Except all the wheel bearings are good, i have changed all the fluids in the car checked all the cv joints, i have rotated the tires and put the tires to the proper pressures. I have also removed the 1 loose heat shield all others are tight. The noise happens anytime off throttle in any gear other then 1st I have also noticed before this happened when under hard throttle in 1st gear right around 4500 rpm the car would stumble as if the tires had lost traction. Does anyone have any clue??? I had a friend that has owned numberous subarus look at it and he was completely stumped,
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Old 03-08-2011, 11:40 AM   #2
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Sounds like it could be a bad differential.
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Old 03-08-2011, 11:52 AM   #3
ridin59vette
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Thats what I thought as well but The rear end was checked out and said to be fine
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Old 03-08-2011, 03:01 PM   #4
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You never told us what kind of car it is and how many miles on it? Did you spin the tires at high speed right before you heard the sound?
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Old 03-08-2011, 04:17 PM   #5
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Chk the rear sub frame and diff mount for security and broken fasteners. Have you drained the rear diff to chk for chunks?

Was your parking brake set while it was during through the storm? Sometimes they stick and can make a pretty loud thud if reversing on a stuck parking brake. I Guess it could even do damage and get broken stuff into a moving part like the rotor. That would certainly make a noise and could even be a friction point to kill mileage.
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Old 03-09-2011, 09:50 AM   #6
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It is a 99 imprezza L im pretty sure it has had a 2.5 swapped in though, It has 198k on the clock yes the car had been sitting for 10 days while I was on vacation In key west, I have changed the rear diff fluid there was no chunks but it did come out a milky brownish/green and in clumps, not a solid stream. Whoever had changed the fluid last had put the drain plug in the top and the fluid check plug in the bottom. The parking brake would make alot of sense but it wouldnt explain why the car would stumble under hard acceleration in 1st and 2nd gear, any idea on that?
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Old 03-09-2011, 09:53 AM   #7
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Quote:
Originally Posted by Samirr76 View Post
You never told us what kind of car it is and how many miles on it? Did you spin the tires at high speed right before you heard the sound?
Yes it had slid down my steep driveway overnight in a freezing rain storm, The car got stuck down at the bottom and I beat it pretty hard to free it. But I had driven the car for a few days after before Leaving it on vacation.
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Old 03-09-2011, 10:50 AM   #8
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that too bad. probably your rear diff.
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Old 03-09-2011, 10:36 PM   #9
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If the 99L has a rear lsd, those chunks of milky white stuff in your diff housing could have been the special fluid the should be sealed between the two sides of the diff. That's just an idea/guess.

This might be something to search for or ask about in the driveline forum
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Old 03-10-2011, 01:19 PM   #10
ridin59vette
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Do you know how I would check if it is and lsd Differential?
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Old 03-10-2011, 08:13 PM   #11
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Quote:
Originally Posted by ridin59vette
Do you know how I would check if it is and lsd Differential?
Nope, I dont. If you have a owners manual it should say. Other wise chk the diff sticky in the trans/driveline forum. It will say there. Keep in mind that a viscous lsd is the one with the silicone fluid and other mechanical lsd's don't have the same fluid. They could still be damaged and over heated fluid could be like yours was in any case.
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Old 03-11-2011, 01:02 AM   #12
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it seems like the general consensus is the rear diff which does make sense. u might have the trans checked out as well, make sure the front transaxle set up didnt chunk out.
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Old 03-14-2011, 10:56 AM   #13
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Cars in the shop Drove it 3 miles without exploding hope to hear today what they find
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Old 03-14-2011, 11:53 AM   #14
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Quote:
Originally Posted by ridin59vette View Post
Cars in the shop Drove it 3 miles without exploding hope to hear today what they find

hopefully they are nice to you and find something simple like a piece of wire wrapped around the driveshaft throwing it off balance
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Old 03-14-2011, 12:21 PM   #15
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They Just called transmission is shot, what are my options??????
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Old 03-14-2011, 01:13 PM   #16
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dude, that sucks.

at this point a rebuild is probably the most economical option you have if you plan to keep the car for awhile

otherwise you could check the forums for a full part out from a lower mileage car to have it shipped to you.

also might check rs25.com to see if someone on there is selling a tranny since most wrx's came with sticks.
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Old 03-15-2011, 03:47 PM   #17
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Is there a certain ratio I need to find?
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Old 03-16-2011, 01:34 PM   #18
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ugh, tranny? that still doesnt sound right after what you were explaining....
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Old 03-16-2011, 03:04 PM   #19
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Yea it sounds like a bearing exploded in the tranny, The shop owner put the car on the lift in 5th gear and you could litterally feel the bearings smashing around in the transmission with your hand on the bottom of the tranny, The car also has a bad axle on the drivers side front he said was contributing to the problem
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Old 03-16-2011, 03:52 PM   #20
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I like worthless thread titles.
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Old 03-16-2011, 04:29 PM   #21
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Quote:
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I like worthless thread titles.
I fully understand and share this sentiment.
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