Front or Rear Brake Problem? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-15-2006, 08:59 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2005
Location: Michigan
Posts: 241
Thanks: 0
Thanked 0 Times in 0 Posts
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?
marquette97 is offline   Reply With Quote
Old 08-17-2006, 11:16 AM   #2
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2005
Location: Michigan
Posts: 241
Thanks: 0
Thanked 0 Times in 0 Posts
marquette97 is on a distinguished road
Default

any ideas?
marquette97 is offline   Reply With Quote
Old 08-17-2006, 11:24 AM   #3
Senior Member
True Car Nut
 
Join Date: Jan 2006
Location: NEBF:06,07 | NYBF:06,07 | ONBF:06,07 | CNBF:06 & more............
Posts: 8,029
Thanks: 0
Thanked 0 Times in 0 Posts
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.?
bandit is offline   Reply With Quote
Old 08-17-2006, 11:58 AM   #4
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2005
Location: Michigan
Posts: 241
Thanks: 0
Thanked 0 Times in 0 Posts
marquette97 is on a distinguished road
Default

Quote:
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
marquette97 is offline   Reply With Quote
Old 08-17-2006, 12:17 PM   #5
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
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.
lash is offline   Reply With Quote
Old 08-17-2006, 12:20 PM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Grand Rapids, Mi
Posts: 5,656
Thanks: 0
Thanked 0 Times in 0 Posts
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.
Archon is offline   Reply With Quote
Old 08-17-2006, 02:59 PM   #7
Senior Member
Posts like a Northstar
 
Join Date: Sep 2005
Location: Dayton, OH
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
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.
imidazol is offline   Reply With Quote
Old 08-17-2006, 03:08 PM   #8
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2005
Location: Michigan
Posts: 241
Thanks: 0
Thanked 0 Times in 0 Posts
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.

Quote:
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.
marquette97 is offline   Reply With Quote
Old 08-17-2006, 03:22 PM   #9
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

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

Quote:
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.
lash is offline   Reply With Quote
Old 08-17-2006, 05:56 PM   #10
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Dec 2005
Location: Michigan
Posts: 241
Thanks: 0
Thanked 0 Times in 0 Posts
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
marquette97 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
rear brake caliper - reattaching e-brake cable *pic added* bigpimpin379 2000-2005 1 04-13-2008 11:09 PM
Parking Brake/Rear Brake issues? ukie eagle 1992-1999 13 01-17-2007 01:57 PM
Brake System + Rear Brake Conversion wjcollier07 1987-1991 4 03-30-2006 12:16 PM
Brake Lines brake lines oh god brake lines disco_dotty 1987-1991 14 01-19-2005 08:38 PM
Front and Rear Brake Upgrades Paulnold Performance, Brainstorming & Tuning 2 01-06-2003 03:41 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:58 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.