SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
||||
|
||||
Strange noise ??
Ok I hope if I throw this out there - I may get the answer so here goes ! (after all you guys are the knowledge !)
1992 SVX with good service history. 106K miles genuine. After market alloys and tyres. All checked and AOK JUST rebuilt rear diff - all AOK JUST fitted NEW rear wheel bearings all AOK Rear brakes and discs could be better (new ones very soon) but still serviceable so read AOK. The above was done to try and hunt out a strange noise....... 0 - 40mph we get a whoom whoom whoom that appears to be in tandem with road speed (I wish I could record this so you could hear it !) Above that it is either lost with the sound of the overall speed or it goes - I am not sure which ! The sound would appear to come from the rear left wheel !!! (hence we did that bearing first- and it was done for me by a Subaru expert so has been correctly done) We are now thinking centre prop bearing ?? And of course thats a pita to get to (new SS exhaust coming as the one currently on wont be able to go back on !!) There was lift in the diff input (which is now fixed) The Auto box appears to be fine and works as it should. Anyone had this ?? or can suggest a possible? Thanks !
__________________
Cheers GILES. Halifax - UK 1996 SVX - Red with Black Roof 1992 MV Brumby Brat - Red (much modified) 1990 MV Brumby Brat 2" lift and big wheels 2012 Outback Diesel - my daily 2002 Forester Sport - wifey's daily 2014 Ossa TR250i Trials Iron - weekend fun ! Last edited by scoobydo; 05-30-2012 at 02:25 PM. Reason: more info added. |
#2
|
||||
|
||||
Re: Strange noise ??
Quote:
If it speeds up proportionally to RPMs, then look at the engine stuff (mounts, misfires, etc.) If it speeds up proportionally to ground speed, then look at bearings, drivetrain, axles, wheel balance issues (hubs, rims, tires), or maybe diffs. Do you feel it or do you hear it? You usually hear bearings and tires. you often feel axles. Driveshaft I'm not entirely sure, but I'd guess you'd feel it at least a little. Usually front axle symptoms are easier to narrow down, because they give more feedback, especially through the steering wheel. I'd lean toward one of the rear axles being bad, or a bad driveshaft U-joint or center bearing.
__________________
'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album Last edited by icingdeath88; 05-30-2012 at 05:45 PM. |
#3
|
|||
|
|||
Re: Strange noise ??
Quote:
but i can feel and hear a very loud and pretty violent vibration when turning right or left from a stop . i originally though it was the left rear axle but when driving slowly there is also an audible ting ting ting noise , which is the unis grabbing and releasing on where they are worn (my old rwd corolla used to do the same thing i replaced the unis and it was fixed ), it also makes a loud ting when reverse is selected my suggestion is get a drive shaft from a car with cheap and serviceable/replaceable unis (in aust holden commodore ones are cheap and plentiful ) and have those uni bits welded onto the svx shaft at a drive shaft shop thats what i plan to do with my drive shaft im getting for 5 speed |
#4
|
|||
|
|||
Re: Strange noise ??
Quote:
|
#5
|
||||
|
||||
Re: Strange noise ??
More pronounced sound from left or right sides? Or can't tell? Wheel balance, axles, drive line. Get it off the ground, run it,see if the sound is still there.
|
#6
|
||||
|
||||
Re: Strange noise ??
First, I'm no expert.
I had a similar experience with an Audi A3. Mechanic and service manager were sure it was wheel bearings, but when the car was on the hoist the bearings checked out OK. The problem was extreme cupping of the rear tires. Replacing them cured the problem. An easy way to check for cupping is to drive over a dusty floor. When you lift the car you can then easily see the pattern of wear on the tire. No dust or less dust where the tire is cupped. Also a random thought. Are your differential bushings good? Bad ones would allow transmission of a lot of diff noise.
__________________
Peter ART Cryogenic/Slotted Rotors, Stainless Steel Brake Lines, PWR Radiator, Tranny cooler, Stebro, Earthworm's Poly Differential/front & rear swaybar bushings, Koni Inserts and Mychailo SVX Sport Springs all 4 corners, Indigo Blue paint. Liquid Silver Wheels. |
|
|