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Old 02-23-2004, 06:07 PM   #1
Losiho
Scooby Newbie
 
Member#: 44700
Join Date: Oct 2003
Location: Melbourne Australia
Vehicle:
1999 2ndGenOutbackGX
Green Mica

Question "Disc Pad Shift Knock" ?

Whenever I reverse my Outback, then select a forward gear, my front dics pads make a knocking noise. For instance, I'll select reverse, slowly reverse out of a car parking space, then stop. I then select drive, drive for a short distance, and as soon as I hit the brakes with the car travelling forwards, the pads will knock (a clunking noise from the front end).

I complained to my service department, who said it was "normal" and anti squeal applied to the pads is the only solution, but I have never had a car that's had the same "problem" (if you could call it that - more of an annoyance). The only thing is the effect of the anti squeal they applied to the pads at the last service only helped for about 100km before the knock came back.

Do all Outbacks suffer the same problem ?
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Old 02-23-2004, 06:18 PM   #2
RidinLow
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Member#: 329
Join Date: Sep 1999
Chapter/Region: Tri-State
Location: NJ
Vehicle:
1995 325i
Arctic Gray

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Antisqueal isn't gonna do anything for this. All antisqueal is is a paste that dampens any small vibrations you may have when the pad is applied to the rotor.

If it really is the pads, then it sounds like they're shifting back and forth in the caliper. The only way you can be sure is to swing the caliper up out of the way and check if the pads are firmly seated. If they aren't, then you have a problem that can be remedied by changing the pads. I'm not sure what would cause a pad to not fit snugly in the caliper though.
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Old 02-23-2004, 09:34 PM   #3
Losiho
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Member#: 44700
Join Date: Oct 2003
Location: Melbourne Australia
Vehicle:
1999 2ndGenOutbackGX
Green Mica

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I'm planning on fitting Bendix Ultimate pads and DBA slotted rotors sometime this year, so I'll see if the problem is still around with different pads installed.
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Old 02-24-2004, 11:45 AM   #4
outback_97
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Member#: 30874
Join Date: Dec 2002
Location: salt lake city, ut
Vehicle:
0897 OUTBACKS
and 2003 TS wagon

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Losiho:

I think I have had a somewhat similar problem (annoyance is probably more accurate) with mine. At slower speeds (5 to 25 mph or so) the front left wheel would make a light repeated knocking noise, related to speed. Light pressure on the brake pedal would silence it. It was somewhat intermittent but happened a lot.

I took it to a brake shop and they fixed it with some sort of shim behind the pad. It was only $15 and it was quiet for over a year, but now it's starting to do it again. Guess I'll have to have them do it again, but they said it shouldn't affect brake operation, so it's not really a safety concern.

Steve
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Old 02-24-2004, 01:27 PM   #5
Spidey Rex
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Member#: 52334
Join Date: Jan 2004
Location: San Diego
Vehicle:
2002 WRX sedan
SRP

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Both my wife's 2001 Outback sedan and my 2002 WRX do the same thing, a pad click when going from reverse to forward. The mechanic said it is nothing to worry about. It is barely noticeable on the outback, but kinda loud on the WRX.

Braking had never been affected though.
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