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Old 05-23-2008, 10:56 AM   #1
JavaBot
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Sup guys,
I got my rex with about 29K miles and I'm up to about 50k or so now... Dude I bought it from said he did the 30k service and I was going to wait till the 60k mark to do mine, but now when I'm braking down from higher speeds (off highways etc.) the car sort of vibrates.... Do I just need new brake pads or rotors or do you think this will be an alignment thing/lots of $$ for a full service? I do have aftermarket wheels that I'm not sure were aligned when I got the tires mounted and installed.

Any advice on this would be appreciated... thanks in advance!
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Old 05-23-2008, 10:58 AM   #2
so steezy
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when was the last time you got your rotors replaced?
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Old 05-23-2008, 11:03 AM   #3
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Originally Posted by so steezy View Post
when was the last time you got your rotors replaced?
Meh? I haven't. The guy I bought it from said he got a full service at Subaru Dealership but at 29k, I'm willing to bet he probably didn't get new rotors... He was good with it though and kept it bone stock and garaged for whatever thats worth.
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Old 05-23-2008, 01:33 PM   #4
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I was putting up with brake pulsations for quite awile until I finally got around to putting on new front rotors and pads all around. I have been really pleased with the results.
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Old 05-23-2008, 02:26 PM   #5
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Originally Posted by maxpower45 View Post
I was putting up with brake pulsations for quite awile until I finally got around to putting on new front rotors and pads all around. I have been really pleased with the results.
Thanks max, out of curiosity... about how much did new rotors and pads run you? Did you just replace the stock ones or did you upgrade? If its alot to replace them all I might as well just pay a little extra and upgrade, but if theres a big price difference I will probably just replace the stockers. Input appreciated! Thanks again
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Old 05-23-2008, 09:43 PM   #6
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Mseno do you have bigger wheels on your car 17's or 18's? if so get bigger rotors or stock size vented! Trust me i went threw 2 pairs of rotors fast with 18's from stopping fast at highway speeds, the little rotors cant handle it! Just some food for thought.
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Old 05-27-2008, 04:03 AM   #7
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Sounds like warped rotors. Is the vibration coming through the steering wheel or through your seat? If it's the former, then it's most likely the front rotors, if the former then the rear. If it were a tire problem, you'd usually feel the vibration usually after a certain speed. Usually any time you do anything to the suspension/tires/wheels, it's a good idea to get an alignment done. Course, it's probably overkill for when you upgrade rims/tires, IMO. But in your case, I don't think it's the alignment.

I'm not sure what greyghost's mods are if any other than the bigger rims, but unless you do track days and the like, you're prob ok w/ just the factory stuff. One thing to keep in mind though is if you like to do runs up in the hills, when you get to the bottom, don't keep your foot on the brakes when you're at a complete stop. That's a good way to get them to warp because they'll likely be hot. You could try having a shop service the rotors, but that may or may not cure the problem in the long term.

I just checked the service manual for brake service. The only thing recommended for change is the brake fluid every 30k miles. Always a good idea to keep it fresh. It wouldn't hurt to have it changed every 2 yrs either as brake fluid absorbs moisture and that's no good.

Feel free to PM me as I don't check the board often.
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Old 05-28-2008, 10:39 AM   #8
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Quote:
Originally Posted by greyghost View Post
Mseno do you have bigger wheels on your car 17's or 18's? if so get bigger rotors or stock size vented! Trust me i went threw 2 pairs of rotors fast with 18's from stopping fast at highway speeds, the little rotors cant handle it! Just some food for thought.
Yup, greyghost I do have bigger wheels. 18's with low pro tires. My rex is my daily driver, and I don't push it too hard... though I do get on the highway everyday going to work for about 2/3 exits. Decelerating on the off-ramp is the only thing that shakes me. Yuletak the vibrations come through the steering wheel, but really only when braking at higher speeds (75+). I'm pretty sure I'll need new brake pads but should I replace the rotors too? Should I upgrade to slotted, or a bigger size since I have 18's? Maybe I'll just do the works, (pads, rotors, brake fluid?)

Gotta service the beast when I get my stimulus check anyway. Should I find a brake shop for this or do a dealership servicing? I have heard the Philly Subaru isn't the best and might try to rip me off.......
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Old 05-28-2008, 10:55 AM   #9
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Quote:
Originally Posted by msesno View Post
Thanks max, out of curiosity... about how much did new rotors and pads run you? Did you just replace the stock ones or did you upgrade? If its alot to replace them all I might as well just pay a little extra and upgrade, but if theres a big price difference I will probably just replace the stockers. Input appreciated! Thanks again
Sorry, didn't see this until today. The new front rotors were about $30 each from Autozone. I didn't replace the rear rotors but I did clean them with a scotch-brite like pad fitted to a drill to remove the old pad material and prep them for the new pads. I had a set of Hawk HPS pads I bought a while back during a group buy.
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Old 05-28-2008, 11:03 AM   #10
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OEM rotors are 130 shipped for the front from WRXBrakes...I personally wouldn't go near generic rotors, some people have luck with them but if your pushing your car enough to overheat the stock pads I would use OEM or better.

I'm having the same issue you are, I'll be ordering Outback XT rotors for the front, Hawk Pads for F&R, and brake lines. Can't decide between HPS and HP+. I was quoted 2 hours of labor for the F&R combined.
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Old 05-28-2008, 02:34 PM   #11
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The OEM Subie rotors seem to die an early death here in the land of road salt. I've gone with Brembos from fap99.com on my Legacy and my wife's Outback with better results in terms of longevity....But, msenso, it looks like you're in Philly ("down south") so you might have better luck with OEMs.
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Old 05-28-2008, 05:04 PM   #12
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Try new pads first. It cures my vibration issues. As the pads wear down, it will start to come back.

If it doesn't work for you and you do need new rotors, you haven't lost anything.
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Old 05-28-2008, 05:29 PM   #13
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Quote:
Originally Posted by leecea View Post
Try new pads first. It cures my vibration issues. As the pads wear down, it will start to come back.

If it doesn't work for you and you do need new rotors, you haven't lost anything.
He has if he is paying someone to do it. I would personally replace or machine the rotors. Vibration is caused by uneven deposits of pad material on the face of the rotor.
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Old 05-28-2008, 11:34 PM   #14
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I have the same problem. I just replaced the pads and had the rotors turned. Still the same vibration. but only when I lightly press the brakes. I feel it through the steering wheel.
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Old 05-29-2008, 12:52 AM   #15
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Quote:
Originally Posted by Aaronj View Post
I have the same problem. I just replaced the pads and had the rotors turned. Still the same vibration. but only when I lightly press the brakes. I feel it through the steering wheel.
Did you properly bed-in the pads? Without doing so its very easy to get un-even pad material on the rotor again.
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Old 05-29-2008, 02:06 PM   #16
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Quote:
Originally Posted by leecea View Post
Try new pads first. It cures my vibration issues. As the pads wear down, it will start to come back.

If it doesn't work for you and you do need new rotors, you haven't lost anything.
Yea I think I will try just the pads first... the vibrations aren't too bad even when I'm decelerating from higher speeds but I don't want it to get worse or have a failure or anything. I do have larger aftermarket wheels, but even when I drive 'hard' I don't think its anywhere near hillclimbs or track attacks so I shouldn't be too deep in the hole. Any recommendations for specific type pads? I hear Hawk is where its at... but honestly I'm all stock except for wheels, intake and a few minor cosmetics. I (hope) I should be ok after replacing the pads, and then I'll do the works at a suby dealership after I hit 60k mi. Thanks for the input... any specific type of Hawk pads I should look at? All 4 or just the front? I'm an 04 non sti wrx sedan for the record....

thanks again
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Old 05-29-2008, 02:45 PM   #17
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Nice light upgrade with minimal dust but noticeably better bite is the Hawk HPS (the s=street) alot of people do just the front but then your throwing off teh F/R brake balance..I personally would do all 4.

You can get all 4 for $136 shipped i believe from thekingofparts.com
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Old 05-29-2008, 04:42 PM   #18
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Quote:
Originally Posted by sluflyer06 View Post
Did you properly bed-in the pads? Without doing so its very easy to get un-even pad material on the rotor again.

I agree on this
Re-bed in the pads to remove any deposits of baked-on material on the rotors that could cause the vibration. When you brake, the pads will bump over these deposits causing the shaking. If its not solved, new rotors would help.

I am selling fairly new Hawk HPS and HP+ brake pads right now for a 2004 WRX fitment. Let me know if you want them
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Old 05-29-2008, 07:26 PM   #19
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check your shocks. Mine shakes due to bad front shocks
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Old 06-04-2008, 10:24 AM   #20
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Well I checked everything out from what ppl have said and I think I need new pads, or I may have slightly warped rotors... either way, thanks for all the insight guys! I really appreciate it. Oh and Lathe Werks, I might hit you up for those hawk pads, plus I have a friend that might be interested in your 5 spd transmission. Is it hard to do an auto to manual swap? Her automatic is dying on a 99 rs wagon...
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Old 06-10-2009, 10:05 AM   #21
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did the new pads and rotors made a difference? I am having the same issue.
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Old 06-10-2009, 02:48 PM   #22
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Quote:
Originally Posted by cassinova73 View Post
did the new pads and rotors made a difference? I am having the same issue.
Every time I have experienced these symptoms, new rotors have fixed the problem. Autozone is around $35 per rotor in front.
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Old 06-14-2009, 05:05 PM   #23
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i have changed my rotors and pads but the shakes are still there...pls help someone
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Old 06-15-2009, 02:23 PM   #24
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Assuming you have fixed any braking problem the next step is probably to make certain the tires are balanced before messing with your shocks.

A better route is to get a vibration gauge (I can't remember the correct name), but you place it in the vehicle when you are driving (some are hand-held) and it determines the frequency and amplitude of the vibration and tells you what to fix. They work very well. Any good auto tool place will be able to order you one. I hope this helps....
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Old 06-15-2009, 02:37 PM   #25
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i will look into balancing the tires next even though i doubt thats the cause. Has anyone ever heard about the abs module needing updating because there are problematic. I read that somewhere
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