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Slight vibration when breaking to a stop.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=3&t=32860		 Page 1 of 1
Author:  CD [ Wed May 28, 2008 11:37 pm ]
Post subject:  Slight vibration when breaking to a stop.
I'm getting a slight vibration when breaking at low speed, basicly only when comming to a stop. I thought it was comming from up front but the other day it seemed like it was below me :? It's not a new thing (as in after my new lift), been happening for about 2 months. At 1st it was only when turning left into my drive way at home, now I'm getting it when comming to a stop at a red light. It's not happening all the time (as in every time I stop) so it makes it hard to pinpoint.
Any ideas guy's?
Author:  Ms5490renegade [ Wed May 28, 2008 11:49 pm ]
Post subject: 
happens to me when i stop semi hard from a high speed (55 or more). it only happens sometimes. i have terrible breaks though so it may be your pads need replacing
Author:  Ms5490renegade [ Wed May 28, 2008 11:50 pm ]
Post subject: 
happens to me when i stop semi hard from a high speed (55 or more). it only happens sometimes. i have terrible breaks though so it may be your pads need replacing
Author:  CD [ Thu May 29, 2008 12:47 am ]
Post subject: 
Can't be breaks as I've just had my discs machined and pads replaced (front).
Author:  RkyMtnKJ [ Thu May 29, 2008 1:06 am ]
Post subject: 
When was the last time you rotated your tires? i have a slight vibration/shimmy under braking. It's casused by cupping of the front tires. You could try doing a tire rotation. Im going to get mine rotated next week when i go in for some servicing....I wish i had my own garage :(
Author:  CD [ Thu May 29, 2008 1:36 am ]
Post subject: 
I had an alignment on Monday after a tyre rotation, I really thought that would sort it out as you said but no.
Author:  kj924 [ Thu May 29, 2008 6:06 am ]
Post subject: 
I replaced my pads and had the rotors machined too, and now the rotors are warped. It shouldn't be, but there it is. The rotors warped after they were turned down. I think I will go with some cross-drilled rotors.
Author:  KJ04 [ Thu May 29, 2008 6:15 am ]
Post subject: 
Don't forget to keep checking the lower and upper ball joints for play.
Author:  CD [ Thu May 29, 2008 6:32 am ]
Post subject: 
KJ04 wrote:
Don't forget to keep checking the lower and upper ball joints for play.


OK, I'll do that on the weekend. I did get the recall done, so long back now I can't even remember if it was top or bottom (thinking bottom). I might also have a look and see if there is any play in the drive shaft or front axles & check my CV boots for leaks/rips.
Author:  sleeve84028 [ Thu May 29, 2008 9:38 am ]
Post subject: 
When you had the brakes done, were the calipers able to slide back and forth on the pins? Did you have a stuck piston in one of your calipers?

Shimmy or Vibration is either a brake related problem or a steering / suspension problem. - You might have to trouble shoot by eliminating different items on the KJ. Not the rotors. Not the tires... could be this or that.. keep going and eventually you'll sort it out.
Author:  kj924 [ Thu May 29, 2008 9:50 am ]
Post subject: 
Does the shimmy/vibration transfer up thru the steering wheel? Does the steering wheel actually shake in your hands when applying the brakes? If so, then rotors are most likely the cause.

Check for broken belts in the tires . Rotate the tires to see if the condition changes. Do you have disc brakes all way round, or just front discs?
Author:  CD [ Thu May 29, 2008 6:07 pm ]
Post subject: 
sleeve84028 wrote:
When you had the brakes done, were the calipers able to slide back and forth on the pins? Did you have a stuck piston in one of your calipers?

Shimmy or Vibration is either a brake related problem or a steering / suspension problem. - You might have to trouble shoot by eliminating different items on the KJ. Not the rotors. Not the tires... could be this or that.. keep going and eventually you'll sort it out.


I didn't do the breaks so I will call them today, I get along with the guy that did it so he should be happy to talk about it (not Jeep). I also got them to go over the front to see if anything was loose, this was when I got the breaks & rotation done and he didn't find anything loose. If it's steering related, what should I look for, I just tried to shake the steering arm (tie rod? the one that pushes and pulls the wheel for steering) but no movement. If the callipers did slide back and forth what would that indicate? and again on a stuck piston? I'm not familiar with how the breaks are set up and work.

Quote:
kj924

Does the shimmy/vibration transfer up thru the steering wheel? Does the steering wheel actually shake in your hands when applying the brakes? If so, then rotors are most likely the cause.

Check for broken belts in the tires . Rotate the tires to see if the condition changes. Do you have disc brakes all way round, or just front discs?


No vibration in the steering wheel & no vibration on the foot pedal when breaking + no pulling to left or right when breaking.
Disc brakes all round but the rear looked fine so no need to change or machine. Tyres look fine to me but I will have a better look on the weekend.
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