» Site Navigation | | » Recent Threads | | | | | | | | | | 12-08-2007, 06:55 PM | #1 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Brake pedal shakes in snow...what it can be? When I drive in dry condition I have never face this problem. Yesterday coming from work (snowing in CT) I step the brake pedal all the way down the ramp in LOW speed. I felt the brake pedal SHAKE and a weird noise comming from under the front wheels. After driving my car at 20 mph I brake many times everything ok. When I step the brakes all the way down again I felt the same shaking, rumbling feeling in the brake pedal. When I push the brake a little I didnt feel anything. Today ( nice and sunny) I drove my baby again step in the brakes nothing wrong. What issue I am dealing with? | | | 12-08-2007, 07:19 PM | #2 | doesn't care about you. Join Date: Aug 2004 Location: Denver, CO Posts: 3,925 | Quote: Originally Posted by steve318ti When I drive in dry condition I have never face this problem. Yesterday coming from work (snowing in CT) I step the brake down the ramp in low speed. I felt the brake pedal shaking and a weird noise comming from under the front wheels. After driving my car at 20 mph I brake many times everything ok. When I step the brakes all the way down again I felt the same skainng, rumbling feeling in the brake pedal. Today ( nice and sunny) I drove my baby again step in the brakes nothing wrong. What issue I am dealing with? | It's called anti-lock brakes (ABS). It keeps the wheels from locking up. If you hear that, it means you should slow down. __________________ '99 Dinan M3 | | | 12-08-2007, 07:26 PM | #3 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Quote: Originally Posted by DustenT It's called anti-lock brakes (ABS). It keeps the wheels from locking up. If you hear that, it means you should slow down. | I was less than 10 mph!!!!!! only happens when I was driving in snowy roads.... | | | 12-08-2007, 07:51 PM | #4 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | Quote: Originally Posted by steve318ti I was less than 10 mph!!!!!! only happens when I was driving in snowy roads.... | Take the owner's manual out for a read. Some interesting facts when driving in snow. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 12-08-2007, 08:04 PM | #5 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Not have one! Just using my common sense I know that there is something wrong with the brakes ... I guess....just when I step all the way down the brake pedal in snow I feel that shaking and bumps feeling in my foot (that one in the pedal) seems that thecar car brake and get stauck with something... and I hear a weird humming sound front the hood. | | | 12-08-2007, 08:10 PM | #6 | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 | yep, that would be the ABS pulsating your brakes (ie doing what they're supposed to do). __________________ 1996 318ti, California package, 267k miles current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts 2002 X5 4.4 Sport Package, 53.5k miles Current Mods: e46 m3 steering wheel | | | 12-08-2007, 08:10 PM | #7 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | ABS and ASC-T kicking in. I believe the owner's manual says to turn ASC-T off. What tires are you running? Seems odd to kick in that slow. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 12-08-2007, 08:26 PM | #8 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | I am running 17's with Pirelli Super Sport. It happend with the ASC on and ASC off..... I feels that something is being grinding under my brake pedal.... | | | 12-08-2007, 08:29 PM | #9 | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 | ABS works regardless of ASC. what kind of snow traction do you have? those don't sound like winter tires. if your traction is poor, the ABS will sense lockup and do exactly what it's doing. __________________ 1996 318ti, California package, 267k miles current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts 2002 X5 4.4 Sport Package, 53.5k miles Current Mods: e46 m3 steering wheel | | | 12-08-2007, 08:40 PM | #10 | Senior Member Join Date: Aug 2004 Location: state college, pa Posts: 3,431 | __________________ I scream, you scream, we all scream for ZOMBIES. | | | 12-08-2007, 08:40 PM | #11 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Well they are Four season Tires. How this ASC thing work? Why that rumble, shaking feeling and humming sound? When I drive in snow goes normal or when I brake slow. just when I step all the way down with the brake pedal. Why only when I brake? Thanks guys for your help guys!!! | | | 12-08-2007, 08:51 PM | #12 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Thanks Aceyx! I think ABS is what is happening but the shake is so violent that makes me think something is wrong! I think I am wrong. | | | 12-08-2007, 09:02 PM | #13 | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 | ASC is the traction control system and it utilizes ABS as well as throttle control. ABS operates on its own as well in braking situations where it senses the wheels locking up (therefore losing braking power/control). i must say, the first time my ABS came on, it kinda freaked me out. it does seem like something is going wrong, but it's not __________________ 1996 318ti, California package, 267k miles current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts 2002 X5 4.4 Sport Package, 53.5k miles Current Mods: e46 m3 steering wheel | | | 12-08-2007, 09:17 PM | #14 | Senior Member Join Date: Jan 2007 Location: Shelton, CT Posts: 154 | Thanks guys!!! | | | 12-09-2007, 12:54 AM | #15 | Senior Member Join Date: Nov 2006 Location: Pittsburgh, PA Posts: 1,224 | it's is not that violent. trust me. the one day that you're in the rain doing 35mph behind some guy who suddenly slams on his brakes and you slam on yours pressing all the way down and feel the ABS kick in and your car still continues to inch closer towards that idiot's bumper and the only reason you didn't hit him was because the guy changed his mind or whatever and starting driving again at the last second. . . then you'd really appreciate it. | | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Thread Tools | | Display Modes | Linear Mode | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |