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Steering wheel shakes - Braking at Hwy Speeds

I recently got H&R spacers installed. 20mm in the front and 25mm in the back. I just noticed that my steering wheel shakes when braking at highway speeds. I have

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Old 02-21-2012, 09:06 PM   #1 (permalink)
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Default Steering wheel shakes - Braking at Hwy Speeds

I recently got H&R spacers installed. 20mm in the front and 25mm in the back. I just noticed that my steering wheel shakes when braking at highway speeds. I have a feeling its my brake rotors being warped or something to do with my brake pads. But i can't dismiss the fact that it happened shortly after the spacers installation. Could it just be coincidence? my steering wheel does not shake at all when going at high speeds so I feel like it shouldn't be the spacers. I have a 2010 7AT 370z. 14000kms roughly 8700 miles. I have never changed rotors or anything of that sort. Any ideas? Thanks guys
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Old 02-21-2012, 09:11 PM   #2 (permalink)
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Quote:
Originally Posted by Cafiax View Post
I recently got H&R spacers installed. 20mm in the front and 25mm in the back. I just noticed that my steering wheel shakes when braking at highway speeds. I have a feeling its my brake rotors being warped or something to do with my brake pads. But i can't dismiss the fact that it happened shortly after the spacers installation. Could it just be coincidence? my steering wheel does not shake at all when going at high speeds so I feel like it shouldn't be the spacers. I have a 2010 7AT 370z. 14000kms roughly 8700 miles. I have never changed rotors or anything of that sort. Any ideas? Thanks guys
If the vibration only occurs under braking, I'm guessing it's the rotors.
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Old 02-21-2012, 09:12 PM   #3 (permalink)
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to insure it's not the spacers? remove them and see if it goes away
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Old 02-21-2012, 09:17 PM   #4 (permalink)
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99% sure that the problem you are describing is a little bit of a warped rotor problem... the spacers just might be helping magnifying the problem a little more.
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Old 02-22-2012, 03:01 PM   #5 (permalink)
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to insure it's not the spacers? remove them and see if it goes away
Agree... if they are direct mount it will only take you a few minutes to remove... better safe than sorry.

I just installed some 15/20 mm stud replacement ones and I get no vibration... only change was the steering being a bit more sensitive to road variations.
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Old 02-22-2012, 03:14 PM   #6 (permalink)
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this makes me very curious. I noticed vibration after installing H&R spacers as well, thought it might be the spacers but dismissed it to being brake build up or slightly warped rotors. I have a feeling spacers have something to do with this. I don't think mine are direct bolt-ons either and since the vibration isn't that bad and I don't have any vibration at high speed I'm living with it right now.
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Old 02-22-2012, 03:26 PM   #7 (permalink)
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this makes me very curious. I noticed vibration after installing H&R spacers as well, thought it might be the spacers but dismissed it to being brake build up or slightly warped rotors. I have a feeling spacers have something to do with this. I don't think mine are direct bolt-ons either and since the vibration isn't that bad and I don't have any vibration at high speed I'm living with it right now.

Does it shake under normal driving conditions? If so it's probably spacers o.o
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Old 02-22-2012, 03:53 PM   #8 (permalink)
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only vibrates during braking and nothing else but it started immediately after the spacers install
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Old 02-22-2012, 04:03 PM   #9 (permalink)
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Guess we're on the same boat. I'm at the dealership right now waiting for the Z. Il let you know if they find the problem.
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Old 02-22-2012, 04:10 PM   #10 (permalink)
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I would check to make sure the lugs are torqued correctly. It sounds a lot like the rotors, but I would stilll check to make sure there isn't any "play" at the wheels.
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Old 02-22-2012, 06:06 PM   #11 (permalink)
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it was just the rotors being warped... as expected.. they just machined it for free and there's no more vibrations.
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Old 02-22-2012, 06:14 PM   #12 (permalink)
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thanks for letting us know ...they didn't give you any crap for having spacers...?
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Old 02-23-2012, 03:59 AM   #13 (permalink)
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nop no mention at all. Everything was covered by warranty. Only problem was washing my car after i specifically said "please don't wash it, vacuum it... but don't wash" LOL. (hopefully no damage!)
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Old 03-16-2012, 09:13 PM   #14 (permalink)
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I had a nasty steering wobble under heavy braking after numerous track days. Rather than waste time getting the rotors turned, I swapped in new OEM rotors in the front for $90 each. Takes less than an hour and the wobble is history.
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Old 04-27-2012, 08:03 PM   #15 (permalink)
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nop no mention at all. Everything was covered by warranty. Only problem was washing my car after i specifically said "please don't wash it, vacuum it... but don't wash" LOL. (hopefully no damage!)
Warped rotors are covered under warranty? Im getting some shake braking at highway speeds
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