EM TuningJMB Retrofits
Results 1 to 5 of 5
  1. #1
    Rafkoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Feb 2008
    Location
    S London
    Posts
    64

    Strange noise from rear brakes.... When driving..?

    Since I've had the car (over a year), I think I have has a slight problem with one of my rear brakes….

    There is scraping noise coming from the rear when driving at low speed -

    The noise sounds similar to like someone sharpening a knife on a sharpening block - so it's not constant, but increases in frequency and pitch the faster I drive - and is very much in synch with the rotation of the rear wheels… at about 5mph I can hear it "whish……………....whish………………...whish….", the faster I get the faster it also gets….. It's not exceptionally loud and can't hear it by the time I'm up to 15mph.. And under normal driving you can't hear it at all….

    A further bit of info that might help you clever chaps diagnose this…. If the car has not been driven for a while - say a week….. And I try to pull away under idle rpm (it's a DSG) the car moves as if to go then stops - because something has seized (in the rear wheels/brakes??…) and I have to give it a little throttle for it to "break" free of whatever has seized…. And it's a definite and sudden "breaking" free of whatever is holding it back… rather than moving against gravity - could this be related to the problem above…?

    Thanks for any input guys. Will get the brakes checked out - but want to go there with a bit of info to give the mechs.

    Cheers
    Raf
    *
    Last edited by Rafkoo; 1st September 2009 at 12:53.
    A3 3.2Q Sport DSG

    "Knowledge is power, tuning knowledge is horse power"

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    leach76's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2009
    Location
    sheffield
    Posts
    305
    Mate to me this sounded like one of the rear back plates or dust shields either catching on the disk at 1st or a stone caught between the 2,but now with you mentioning the car holding back i would either say you have got a kinked brake pipe not allowing fluid to release correctly or other thing could be the handbrake lever on the caliper sticking, it the rear wheel or wheels getting hot while driving? if so it wants sorting asap because it will be drying grease up in your bearings if so.Have a look under the back of the car at the calipers=where the handbrake cable attatches to the caliper that lever should be at same height on both sides

  4. #3
    Rafkoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Feb 2008
    Location
    S London
    Posts
    64
    Thanks for the reply mate - I'm not aware of the wheel gettign hot - although I've never checked it to be honest.

    I'm taking her in today to be checked out....
    A3 3.2Q Sport DSG

    "Knowledge is power, tuning knowledge is horse power"

  5. #4
    Rafkoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Feb 2008
    Location
    S London
    Posts
    64
    Collected the car... and basically they said they couldn't find anything wrong with it.... some rust on the outside edge around the disks which could cause a minor "lock" if some rust builds up between the pad and disc if it's been standing around for a week without being driven - but couldn't replicate the noise....

    It's true, that the noise and "siezing" only seems to be apparent after it's been sat for a while.... but still.... shame they couldn't isolate what it could really be....
    A3 3.2Q Sport DSG

    "Knowledge is power, tuning knowledge is horse power"

  6. #5
    2nd Gear

    Status
    Offline
    Join Date
    Aug 2007
    Posts
    439
    I would suggest you wait until you're sure the fault will occur and then jack the car and check the rotation of the rear wheels....
    A3 2.0TDI Sportback S Line 184 Quattro S-Tronic, Mar. 2014 Glacier white. Electric seats, sunroof, se suspension, heated folding mirrors, Reversing camera, Nappa leather, TPMS, Hold assist, Xenon plus adaptive lights with variable active range control, lane assist, Interior light pack, Technology pack, Comfort pack with ACC, park assist & parking system plus

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO