1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Front or Rear Brake Problem?

Thread Tools
 
Search this Thread
 
Old 08-15-2006 | 07:59 PM
  #1  
marquette97's Avatar
Thread Starter
Senior Member
Posts like a Turbo
 
Joined: Dec 2005
Posts: 241
Likes: 0
From: Michigan
marquette97 is on a distinguished road
Default Front or Rear Brake Problem?

I have noticed that around speeds under 35mph, I start to get a slight bouncing/front to back movement when I step on the brakes. Now usually, as I have always heard, when the front rotors are bad, the steering wheel will shake, and the pedal will pulsate. My car does neither. The brakes just seem to have a weird feel to them, like I can feel the rear brakes doing sort of a grabbing thing. Maybe it'* the drums?
Old 08-17-2006 | 10:16 AM
  #2  
marquette97's Avatar
Thread Starter
Senior Member
Posts like a Turbo
 
Joined: Dec 2005
Posts: 241
Likes: 0
From: Michigan
marquette97 is on a distinguished road
Default

any ideas?
Old 08-17-2006 | 10:24 AM
  #3  
bandit's Avatar
Senior Member
True Car Nut
 
Joined: Jan 2006
Posts: 8,029
Likes: 0
From: NEBF:06,07 | NYBF:06,07 | ONBF:06,07 | CNBF:06 & more............
bandit is on a distinguished road
Default

sounds like one or both of your Rotors are warped.

does it stop doing right away when you let off the brakes?

also does it get worse when you press harder.?
Old 08-17-2006 | 10:58 AM
  #4  
marquette97's Avatar
Thread Starter
Senior Member
Posts like a Turbo
 
Joined: Dec 2005
Posts: 241
Likes: 0
From: Michigan
marquette97 is on a distinguished road
Default

does it stop doing right away when you let off the brakes?

also does it get worse when you press harder.?
No it still has a weird feeling after I let off the brakes for a minute, and when I step on the brakes hard, there is no pulsation felt in the vehicle
Old 08-17-2006 | 11:17 AM
  #5  
lash's Avatar
Senior Member
True Car Nut
 
Joined: Oct 2005
Posts: 7,030
Likes: 2
From: Central Florida
lash is on a distinguished road
Default

So, let me get this straight. You feel a grabbing and releasing sensation while braking?

Does it change with the speed you are going or is it the same no matter what speed?

Very rapid or not? What makes you believe it is the rear brakes?

Try to be as specific as possible.

A thought I had was that there'* always a possibility that either your rotors or drums have developed a glazed section or two.
Old 08-17-2006 | 11:20 AM
  #6  
Archon's Avatar
RIP
True Car Nut
 
Joined: Jul 2004
Posts: 5,656
Likes: 4
From: Grand Rapids, Mi
Archon is on a distinguished road
Default

I'm not sure if I understand the problem correctly, but in case I do, try pulling the rear drums and see if maybe a wheel cylinder is leaking fluid onto the drum surface.
Old 08-17-2006 | 01:59 PM
  #7  
imidazol's Avatar
Senior Member
Posts like a Northstar
 
Joined: Sep 2005
Posts: 600
Likes: 3
From: Dayton, OH
imidazol is on a distinguished road
Default

Have you tried using the emergency brake to see if it'* the rears causing the pulsing.

Another possibility would be a tire, either from wear or from the belts within, causing the sensation of rocking forward and backwards.
Old 08-17-2006 | 02:08 PM
  #8  
marquette97's Avatar
Thread Starter
Senior Member
Posts like a Turbo
 
Joined: Dec 2005
Posts: 241
Likes: 0
From: Michigan
marquette97 is on a distinguished road
Default

I've thought about the tires too, before I bought it it sat on pavement unmoved for 60 days.

What makes you believe it is the rear brakes?

Like I said earlier, I have always heard, when the front rotors are bad, the steering wheel will shake, and the pedal will pulsate. My car does neither.
Old 08-17-2006 | 02:22 PM
  #9  
lash's Avatar
Senior Member
True Car Nut
 
Joined: Oct 2005
Posts: 7,030
Likes: 2
From: Central Florida
lash is on a distinguished road
Default

Originally Posted by marquette97
I've thought about the tires too, before I bought it it sat on pavement unmoved for 60 days.

What makes you believe it is the rear brakes?

Like I said earlier, I have always heard, when the front rotors are bad, the steering wheel will shake, and the pedal will pulsate. My car does neither.
Those are symptoms of a warped rotor, true, but not all issues with your front brakes will telegraph to your steering wheel or pedal and not all front barke problems are due to a warped rotor.

In the meantime it won't hurt to jack up your car and do some analysis on the rear brakes and all tires. If it'* new to you, these things should be checked anyway.
Old 08-17-2006 | 04:56 PM
  #10  
marquette97's Avatar
Thread Starter
Senior Member
Posts like a Turbo
 
Joined: Dec 2005
Posts: 241
Likes: 0
From: Michigan
marquette97 is on a distinguished road
Default

Today I heard a rubbing sound comming from the back, so this makes me think its the drums for sure. The front rotors don't vibrate at all


Quick Reply: Front or Rear Brake Problem?



All times are GMT -4. The time now is 02:07 PM.