General Tech Ask model specific questions in the appropriate category below. All other general questions within.
Sponsored by:
Sponsored by: DashLynx

weird breaking problem

Thread Tools
 
Search this Thread
 
Old 03-24-2009, 10:11 AM
  #1  
FivePointOhh
in limbo
Thread Starter
 
FivePointOhh's Avatar
 
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
Default weird breaking problem

im fixing a friends car but i've never had this kind of issue before. its a 1996 cavi 4cyl.

anyways when you step on the breaks hard enough to where the back breaks begin to engage the car squats extremely hard in the rear end. almost like a dog when he reaches the end of his leash, just drags the rear down. i inspected the rear end, linkage, break lines, bled the breaks....

i guess i dont know what else would cause this or what to look for. anyone heard of this or any suggestions?

Last edited by FivePointOhh; 03-24-2009 at 10:19 AM.
FivePointOhh is offline  
Old 03-24-2009, 10:50 AM
  #2  
Stepman
4th Gear Member
 
Stepman's Avatar
 
Join Date: Mar 2004
Location: Az
Posts: 1,090
Default

Sounds like the fronts not working. Push down on the pedal (like bleeding) and crack the line (for the front brakes) coming off the combination valve. If you don't get much fluid to come out, do the same thing where the line comes out of the master cyl.

...if you get no pressure out of the combo, but you do from the master, the combo is bad


if you get no pressure from master....it's bad.
Stepman is offline  
Old 03-24-2009, 11:12 AM
  #3  
FivePointOhh
in limbo
Thread Starter
 
FivePointOhh's Avatar
 
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
Default

if you break less than 50%(not really sure how you describe it) but to where the front should only be working it stops just fine. but an any semi emergency breaking where you have to push the pedal down hard is when it dips really hard. i just to cover my bases i did bleed MC first and then all break lines. all seem to have great pressure.(as soon as i crack them open fluid shoots out) and the resovior is full....faulty break cylinder in the rear? maybe faulty caliper maybe?
FivePointOhh is offline  
Old 03-24-2009, 11:24 AM
  #4  
acarzt
4th Gear Member
 
acarzt's Avatar
 
Join Date: Sep 2007
Location: Texas
Posts: 1,258
Default

the rear squats when braking hard? That just doesn't sound possible lol
acarzt is offline  
Old 03-24-2009, 11:34 AM
  #5  
FivePointOhh
in limbo
Thread Starter
 
FivePointOhh's Avatar
 
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
Default

i've never came across it yet in all the side work ive done, especially with doing break jobs/break systems which seems to be really common. but yes, you step on the break hard enough to where the rears engage and the rear feels like its being pull out from underneith the car.
FivePointOhh is offline  
Old 03-24-2009, 11:46 AM
  #6  
acarzt
4th Gear Member
 
acarzt's Avatar
 
Join Date: Sep 2007
Location: Texas
Posts: 1,258
Default

Originally Posted by FivePointOhh
i've never came across it yet in all the side work ive done, especially with doing break jobs/break systems which seems to be really common. but yes, you step on the break hard enough to where the rears engage and the rear feels like its being pull out from underneith the car.
Sounds like a suspension problem to me. Not a brake problem.
acarzt is offline  
Old 03-25-2009, 09:44 PM
  #7  
AdderMk2
Banned
 
AdderMk2's Avatar
 
Join Date: Dec 2005
Location: Lil' Rhody
Posts: 22,376
Default

its a common issue with the J-bodies

my sunflower used to do it.
Replace both front rubber brake lines

AdderMk2 is offline  
Old 03-28-2009, 11:24 AM
  #8  
Jfsram
4th Gear Member
 
Jfsram's Avatar
 
Join Date: Jan 2007
Location:
Posts: 1,999
Default

The squatting is coming from when the rear brakes twisting the rear control arm downwards. This pulls the body downwards.

As for this happending on a Calvalier, yes it is a common problem.

Friends Sunfire started doing this right after a brake job. I can't remember is loosening or tightening the rear brakes solved it.
Jfsram is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MasterLanMan
4.6L (1996-2004 Modular) Mustang
6
09-13-2015 08:21 PM
Pyrate Dave
5.0L (1979-1995) Mustang
8
09-10-2015 07:30 PM
Blk Vert
5.0L General Discussion
2
09-09-2015 12:16 PM
zachary1988
4.6L General Discussion
5
09-04-2015 03:04 PM



Quick Reply: weird breaking problem



All times are GMT -5. The time now is 08:34 AM.