Page 2 of 2 FirstFirst 12
Results 26 to 33 of 33

Thread: Car Shakes When Braking at Highway Speeds

  1. #26
    Join Date
    Feb 2010
    Location
    Hampshire UK
    Posts
    6,211
    My Cars
    99 840ci Sport Indv
    Yes, if you have hub-centric rings fitted they can cause all sorts of problems if of poor quality or worn out - more info here:

    http://www.meeknet.co.uk/e31/wheel/F...he_BMW_E31.htm

    ...but really severe shaking is usually brake calipers....
    Last edited by Timm; 03-05-2018 at 09:18 AM.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


    My Current 840ci Sport Individual
    My Current 650ci Sport Individual
    My E31 Repair and Information Website
    My E38 Repair and Information Website
    My E63/E64 Repair and Information Website

    Chase - Heroes to a generation

  2. #27
    Join Date
    Dec 2013
    Location
    Houston, TX
    Posts
    394
    My Cars
    "96 850
    Could you please elaborate on why you think it would be the calipers? My mechanic is adamant that it cannot be them... He says they are sealed and the flood would not have damaged them.

    Is there anyway to check if it is them without replacing them?

  3. #28
    Join Date
    Apr 2005
    Location
    Rigel 7
    Posts
    8,653
    My Cars
    99 M3, 850i
    You can try dragging the caliper at speed. Get into highway speed and hold the brake for a short period as you continue to hold a constant speed to get the brakes nice and hot, which can help retract the pistons fully and reduce stickiness. Then release and get back into the trouble speed zone and see if the shaking has been altered at all.

    A caliper rebuild is fairly cheap insurance and if original, your car would benefit from it anyway.
    Last edited by adamnur; 03-08-2018 at 10:47 PM.

  4. #29
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    2,936
    My Cars
    EXOTICS
    I notice no listing for part#31121136607, why not?
    Your mechanic replaces UCA without also replacing bushings?
    "It's not how you race your car, it's how you stand by your car, you better learn that".
    Edited version-F&F

  5. #30
    Join Date
    Mar 2011
    Location
    Damascus, Maryland USA
    Posts
    1,434
    My Cars
    E31/32/34 VWJetta A3TDI
    Quote Originally Posted by 8eights View Post
    My issue at those speeds years ago were Upper control arms, Change them both, Buy them complete. I chose Lemforder.
    ^^ This, and cheap suspension parts cause problems..

    Quote Originally Posted by jclausen View Post
    If you have non factory brake parts that's why, after you replace the brakes with factory parts then thrust bushings could be worn out from the shaking they we're trying to control
    ^^ Thrust bushings = control arm bushings / control arms

    Quote Originally Posted by barry8108 View Post
    My 840 shaked very bad when braking at high speeds, i was convinced it was control arms. I first replaced all my rotors and that turned out to be the problem. No more shaking at any speed.
    Bad rotors trash Control Arms, bad control arms trash rotors!

    Quote Originally Posted by gixxerss View Post
    Had a similar problem. Crazy shake upon braking at speed. Turned out to be rotors and poorly made hub rings on 5 series wheels. Changed to correct hub sized wheels with new rotors and fixed for now.
    Often overlooked, especially with aftermarket/larger wheels

    Quote Originally Posted by Timm View Post
    The BMW suspension system has a resonant frequency - 50 MPH - 60 MPH for the front and over 80 MPH for the rear:
    The bottom line with shakes/vibrations: Suspension, brakes and wheels are all related. Welcome to E31/E32/E34 McPherson Strut vehicle ownership! It's amazing when it all works, but when shit goes awry, it can be a PITA. If any of them are screwed up, mechanics will first suspect the most obvious (brake rotors). When that doesn't work, things turn to suspension.. Folks try to save money and only replace a few parts, or buy cheap parts.. 30K miles, they're doing it all over again. Plus, extended vibrations are sometimes absorbed by suspension parts, and cause premature failure..

    Prescription (E31/E32/E34): Every 100K miles, replace front end. :-) $1000

    But then again, I'm the electrical guru not a mechanical person, all these folks have far more experience than I in this department!
    Good luck!
    Last edited by EEDegreeToDrive; 03-10-2018 at 10:01 PM.

    '94 525i, '89 735i, '91 850i, '81 MB 380SLC (For Sale), '00 323i -- Trying to collect them all, just need a 1 & 6

  6. #31
    Join Date
    Dec 2013
    Location
    Houston, TX
    Posts
    394
    My Cars
    "96 850
    Hey guys, thank you for the replies. Sorry to bump this, I somehow missed you guys replies.

    I was thinking it was the calipers because of what you guys were saying and because it happened right after the flood. There was no water inside the car but I thought maybe it sat in a few inches... he says it didn't and, on second thought, the calipers are pretty high up... If they were submerged, I think water would've gotten inside...

    He has replaced the front rotors and that didn't fix it. He said it helps until the car warms up. When I told him it was doing that before, he said he thought it was the steering box. He's said this before but now he is adamant this is it. He says all the suspension is new and he's checked over his work. That, the way it's acting, it could be the rotors but it could not be the calipers. He said it could not be the back rotors the way it was transferring to the wheel... is that right? The article Timm posted seemed to suggest, depending on the speed, issues at the back wheels could cause vibrations at the front.

    He thinks it maybe from an old injury? I used to do a lot of drugs and wrecked the car and almost broke a wheel off... I did 360s across like 4 lanes and 3 curbs. It cost like 11k to fix... just almost got totalled.

    When the issue started, it started very mildly in both frequency and intensity. It used to barely shake and it would go away very quickly... it got worse over a couple of weeks. Even now, it seems okay for the first 5 minutes when the car is cold and then it starts and gradually gets worse over a couple minutes.

    I'm not sure if I should let him do it or take it to another shop...

  7. #32
    Join Date
    Jun 2014
    Location
    So. Cal, USA
    Posts
    216
    My Cars
    1995 740iL, 1995 850ciA
    Quote Originally Posted by Guts1200 View Post
    Hey guys, thank you for the replies. Sorry to bump this, I somehow missed you guys replies.

    >>> wrecked the car and almost broke a wheel off... I did 360s across like 4 lanes and 3 curbs. <<<

    .....

    I'm not sure if I should let him do it or take it to another shop...
    Take it to a frame shop that has lasers and have it checked.

    Then take it to somebody that knows 8 series and have them investigate the condition of every bushing in the rear sub-frame AND the condition (correct shape) of each of the 3 links and 2 supports that connect each rear hub to the sub-frame.

  8. #33
    Join Date
    Dec 2007
    Location
    Texas
    Posts
    1,795
    My Cars
    91-Dinan 850TT 74k miles
    Quote Originally Posted by 8eights View Post
    Because it's a control arm bushing and not a caliper.
    I go with servicing/checking the brakes due to the flood just for grins anyway, but I think I agree to not rule out control arms. My experience of shaking was when exiting the interstate and going thru the 60 to 45mph range while braking. 4 cars. Lucky if you get 30-40k miles out of a set imo.
    Quite a thorough and expensive set of replies you have going! I say strip it down to the frame and start over!! This "shake" subject always gets very deep when its really simple. Cheers!

    edit: Thinking about this, if the water got high enough to reach the calipers- would that be above door level? If so, I would sure check the footwell electronics.
    Last edited by TTTXGreg; 04-05-2018 at 11:57 PM.

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Steering wheel shakes when braking at high speeds? HELP E38 Gurus!
    By alpinewhite740i in forum 1995 - 2001 (E38)
    Replies: 13
    Last Post: 04-26-2015, 09:16 PM
  2. Shake when braking at highway speed
    By Houseboater in forum 1999+ X5, X6 (E53, E70, E71, F15, F16)
    Replies: 4
    Last Post: 01-21-2015, 01:13 PM
  3. Car shaking while driving at highway speeds
    By mdimillo in forum 1988 - 1996 (E34)
    Replies: 7
    Last Post: 01-06-2014, 12:28 AM
  4. Shaking When braking At highway speeds??
    By NYZ93 in forum 1996 - 2003 (E39)
    Replies: 20
    Last Post: 07-31-2010, 01:57 AM
  5. Car Shakes When Braking at High Speeds
    By x13alle12x in forum 1996 - 2003 (E39)
    Replies: 13
    Last Post: 03-23-2010, 05:01 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •