Front Vibrations - Steering wheel Shudders
08-02-2012, 09:10 PM
#1
AudiWorld Member
Thread Starter
Join Date: Feb 2008
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Front Vibrations - Steering wheel Shudders
My car has been vibrating in the front whenever I tap the breaks at high speed. its been happening for a while now and its driving me nuts! I took it to the dealership and they told me its definately the tires.
Now that was another different issue all together in fact they were right to some point - The tires were cheap & not meant for a high performace car hence they vibrated at speeds over 75 mph. I fixed that with all new Yokos - perfect choice.
The vibration is now isolated to the break system in the front. The cars steering wheel practically shudders when I break at high speed. Please advise because I'm starting to think the dealership thinks I'm just a cry baby of sorts shyt!
Now that was another different issue all together in fact they were right to some point - The tires were cheap & not meant for a high performace car hence they vibrated at speeds over 75 mph. I fixed that with all new Yokos - perfect choice.
The vibration is now isolated to the break system in the front. The cars steering wheel practically shudders when I break at high speed. Please advise because I'm starting to think the dealership thinks I'm just a cry baby of sorts shyt!
08-02-2012, 09:36 PM
#2
Audiworld Junior Member
Join Date: Nov 2010
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
Looks like you need new front rotors. I had same issue with my 4Runner. Stoping at light while car moving 65+ miles per hr and streeing shaked . dealer changed caliper but no fix. I did my own research and found out rotor surface were un even. I replace front rotors and new pads and problem gone. If you did not change you rotors yet then it is about time.
Hope this help.
Ali...
Hope this help.
Ali...
08-03-2012, 10:06 AM
#4
AudiWorld Senior Member
My car has been vibrating in the front whenever I tap the breaks at high speed. its been happening for a while now and its driving me nuts! I took it to the dealership and they told me its definately the tires.
Now that was another different issue all together in fact they were right to some point - The tires were cheap & not meant for a high performace car hence they vibrated at speeds over 75 mph. I fixed that with all new Yokos - perfect choice.
The vibration is now isolated to the break system in the front. The cars steering wheel practically shudders when I break at high speed. Please advise because I'm starting to think the dealership thinks I'm just a cry baby of sorts shyt!
Now that was another different issue all together in fact they were right to some point - The tires were cheap & not meant for a high performace car hence they vibrated at speeds over 75 mph. I fixed that with all new Yokos - perfect choice.
The vibration is now isolated to the break system in the front. The cars steering wheel practically shudders when I break at high speed. Please advise because I'm starting to think the dealership thinks I'm just a cry baby of sorts shyt!
I had the same problem on a Ford Capri, I put on new discs and the shudder had gone.
Also TSB http://uberlame.com/a6_tsb/Brakes/Br...guidelines.pdf
Last edited by royclark; 08-06-2012 at 09:55 AM.
08-03-2012, 08:59 PM
#5
AudiWorld Member
Thread Starter
Join Date: Feb 2008
Posts: 226
Likes: 0
Received 0 Likes
on
0 Posts
Looks like you need new front rotors. I had same issue with my 4Runner. Stoping at light while car moving 65+ miles per hr and streeing shaked . dealer changed caliper but no fix. I did my own research and found out rotor surface were un even. I replace front rotors and new pads and problem gone. If you did not change you rotors yet then it is about time.
Hope this help.
Ali...
Hope this help.
Ali...
08-04-2012, 02:41 PM
#6
read myth #1
http://www.stoptech.com/technical-su...nd-other-myths
or from wikipedia
Brake judder is usually perceived by the driver as minor to severe vibrations transferred through the chassis during braking.[17][18][19][20][21][22][23][24][25]
The judder phenomenon can be classified into two distinct subgroups: hot (or thermal), or cold judder.
Hot judder is usually produced as a result of longer, more moderate braking from high speed where the vehicle does not come to a complete stop.[26] It commonly occurs when a motorist decelerates from speeds of around 120 km/h (74.6 MPH) to about 60 km/h (37.3 MPH), which results in severe vibrations being transmitted to the driver. These vibrations are the result of uneven thermal distributions, or hot spots. Hot spots are classified as concentrated thermal regions that alternate between both sides of a disc that distort it in such a way that produces a sinusoidal waviness around its edges. Once the brake pads (friction material/brake lining) comes in contact with the sinusoidal surface during braking, severe vibrations are induced, and can produce hazardous conditions for the person driving the vehicle.[27][28][29][30]
Cold judder, on the other hand, is the result of uneven disc wear patterns or disc thickness variation (DTV). These variations in the disc surface are usually the result of extensive vehicle road usage. DTV is usually attributed to the following causes: waviness and roughness of disc surface,[31] misalignment of axis (runout), elastic deflection, wear and friction material transfers.[19][30][32]
http://www.stoptech.com/technical-su...nd-other-myths
or from wikipedia
Brake judder is usually perceived by the driver as minor to severe vibrations transferred through the chassis during braking.[17][18][19][20][21][22][23][24][25]
The judder phenomenon can be classified into two distinct subgroups: hot (or thermal), or cold judder.
Hot judder is usually produced as a result of longer, more moderate braking from high speed where the vehicle does not come to a complete stop.[26] It commonly occurs when a motorist decelerates from speeds of around 120 km/h (74.6 MPH) to about 60 km/h (37.3 MPH), which results in severe vibrations being transmitted to the driver. These vibrations are the result of uneven thermal distributions, or hot spots. Hot spots are classified as concentrated thermal regions that alternate between both sides of a disc that distort it in such a way that produces a sinusoidal waviness around its edges. Once the brake pads (friction material/brake lining) comes in contact with the sinusoidal surface during braking, severe vibrations are induced, and can produce hazardous conditions for the person driving the vehicle.[27][28][29][30]
Cold judder, on the other hand, is the result of uneven disc wear patterns or disc thickness variation (DTV). These variations in the disc surface are usually the result of extensive vehicle road usage. DTV is usually attributed to the following causes: waviness and roughness of disc surface,[31] misalignment of axis (runout), elastic deflection, wear and friction material transfers.[19][30][32]
Last edited by raaizin; 08-04-2012 at 02:45 PM.
08-07-2012, 06:23 AM
#7
AudiWorld Member
The myth state that this only happens at high speeds. You can easily check this by driving at city speeds and see if you still have the jitters. Should you still feel the jitters then your rotors are warped and need to be cut or replaced.
I, myself, have never felt the jitters without my rotor being warped at any speed on any of my cars or trucks. So no I do not believe what has been posted about any myth or Wikipedia.
I, myself, have never felt the jitters without my rotor being warped at any speed on any of my cars or trucks. So no I do not believe what has been posted about any myth or Wikipedia.
