Cherokee Chat General non-tech Cherokee chat
XJ/MJ/ZJ/WJ

Brakes work better in the rain?

Thread Tools
 
Search this Thread
 
Old Jun 25, 2012 | 06:58 PM
  #1  
Drewjharper1900's Avatar
Thread Starter
CF Veteran
 
Joined: Mar 2011
Posts: 1,751
Likes: 3
From: Tampa Fl
Year: 1997
Model: Cherokee
Engine: 4.0 HO
Default Brakes work better in the rain?

Alright so it seams like any time i drive around in water or it rains really hard and my brakes get wet, they seam to work better. Why is this?
Reply
Old Jun 25, 2012 | 07:20 PM
  #2  
NorCalJeep's Avatar
CF Veteran
 
Joined: May 2011
Posts: 2,135
Likes: 1
From: Santa Rosa, California
Year: 1987 Comanche,1990
Model: Cherokee
Engine: 4.0L Renix
Default

I get this too for some odd reason.
Reply
Old Jun 25, 2012 | 07:20 PM
  #3  
d50's Avatar
d50
Senior Member
 
Joined: Mar 2009
Posts: 598
Likes: 2
Model: Cherokee
Default

my rear wheels like to lock up when i hit the brakes and it raining.
Reply
Old Jun 25, 2012 | 09:56 PM
  #4  
SiRed91's Avatar
Member
 
Joined: Jan 2012
Posts: 188
Likes: 1
From: North Salt Lake Utah
Year: 1994
Model: Cherokee
Engine: 4.0
Default

same here, when its very humid out or raining my jeep stops like an indy car
Reply
Old Jun 25, 2012 | 11:30 PM
  #5  
Derision's Avatar
Seasoned Member
 
Joined: Apr 2012
Posts: 254
Likes: 0
From: New Jersey and Maryland
Year: 1996
Model: Cherokee(XJ)
Engine: 4.0L
Default

I just noticed that today. I've got quite a bit of travel in my pedal, though it is firm when it finally gets to that point. Been battling a few annoying squeals in the front brakes and so forth over the past few weeks. Got the first good rain in quite a while this morning, and... pedal barely traveled, no squealing, firm braking. No idea.
Reply
Old Jun 25, 2012 | 11:43 PM
  #6  
nickxj94's Avatar
Senior Member
 
Joined: Jan 2012
Posts: 720
Likes: 1
From: vanburen
Year: 1995 &2000
Model: Cherokee
Engine: 4.0
Default

Mine does too! I think its just washing all the dust out and they work right again lol that's my theory!
Reply
Old Jun 26, 2012 | 12:24 AM
  #7  
purplegrocerygogetter's Avatar
I WIN!
Premium Member
 
Joined: Sep 2011
Posts: 10,898
Likes: 0
From: Sunny CALIFORNIA :-p
Year: 1997
Model: Grand Cherokee
Engine: BIG! HUGE!
Default

Disc brakes perform better in wet weather, because centrifugal force tends to fling water off the brake disc and keep it dry. I also read that early vehicles used what was called "wet" Brakes like in the 1920's they added oil of some sort to the brakes to get better stopping. and the squeal u hear may be the its almost time to change ur brakes sensor... Lol or plain old dust...
Reply
Old Jun 26, 2012 | 04:07 AM
  #8  
Drewjharper1900's Avatar
Thread Starter
CF Veteran
 
Joined: Mar 2011
Posts: 1,751
Likes: 3
From: Tampa Fl
Year: 1997
Model: Cherokee
Engine: 4.0 HO
Default

Originally Posted by Derision
I just noticed that today. I've got quite a bit of travel in my pedal, though it is firm when it finally gets to that point. Been battling a few annoying squeals in the front brakes and so forth over the past few weeks. Got the first good rain in quite a while this morning, and... pedal barely traveled, no squealing, firm braking. No idea.

If you have alot of travel in my brake pedal, try bleeding them.
Reply
Old Jun 26, 2012 | 10:42 AM
  #9  
Outlaw Star's Avatar
CF ADMIN
Veteran: Army
 
Joined: Sep 2010
Posts: 34,088
Likes: 257
From: Lantana, Fl
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Default

Originally Posted by Drewjharper1900

If you have alot of travel in my brake pedal, try bleeding them.
True. Brake fluid breaks down and becomes less effective after 5 years on average. So bleeding and flushing the system is a great start.
Reply
Old Jun 26, 2012 | 10:49 AM
  #10  
nickxj94's Avatar
Senior Member
 
Joined: Jan 2012
Posts: 720
Likes: 1
From: vanburen
Year: 1995 &2000
Model: Cherokee
Engine: 4.0
Default

Mine does it too and I have a totally new brake system,from hard lines, pads, brake fluid,rotors and master cylinder, only thing I haven't replaced is the rubber lines yet and I'm saving up for extended lines to replace them with,
Reply
Old Jun 26, 2012 | 11:16 AM
  #11  
Gee oh Dee's Avatar
CF Veteran
 
Joined: Sep 2010
Posts: 21,168
Likes: 5
From: Milwaukee, WI
Year: 1987
Engine: Check
Default

Originally Posted by purplegrocerygogetter
Disc brakes perform better in wet weather, because centrifugal force tends to fling water off the brake disc and keep it dry. I also read that early vehicles used what was called "wet" Brakes like in the 1920's they added oil of some sort to the brakes to get better stopping. and the squeal u hear may be the its almost time to change ur brakes sensor... Lol or plain old dust...
If it flings the water off wouldnt it perform as though its dry?

And what brake sensor needs to be changed?
Reply
Old Jun 26, 2012 | 11:20 AM
  #12  
Red82's Avatar
Resident Zombie Hunter
 
Joined: Aug 2010
Posts: 3,542
Likes: 2
From: Virginia
Year: 1997
Model: Cherokee
Engine: 4.0L
Default

Originally Posted by Gee oh Dee
If it flings the water off wouldnt it perform as though its dry?

And what brake sensor needs to be changed?
X2
Reply
Old Jun 26, 2012 | 11:27 AM
  #13  
Gee oh Dee's Avatar
CF Veteran
 
Joined: Sep 2010
Posts: 21,168
Likes: 5
From: Milwaukee, WI
Year: 1987
Engine: Check
Default

Originally Posted by Outlaw Star
True. Brake fluid breaks down and becomes less effective after 5 years on average. So bleeding and flushing the system is a great start.
X2!!


Mine preforms the same wet/dry. They'll lock up easier, but thats to be expected as grip is lost on wet surfaces.
Reply
Old Jun 26, 2012 | 02:00 PM
  #14  
93XJLI's Avatar
CF Veteran
 
Joined: Jan 2008
Posts: 3,671
Likes: 10
From: LI, NY
Year: 1998
Model: Cherokee
Engine: 4.0, bolt ons for days...
Default

Drums get "grabby" in the rain.
Reply
Old Jun 26, 2012 | 02:28 PM
  #15  
purplegrocerygogetter's Avatar
I WIN!
Premium Member
 
Joined: Sep 2011
Posts: 10,898
Likes: 0
From: Sunny CALIFORNIA :-p
Year: 1997
Model: Grand Cherokee
Engine: BIG! HUGE!
Default

Originally Posted by Gee oh Dee
If it flings the water off wouldnt it perform as though its dry?

And what brake sensor needs to be changed?
Because the the disc gets wet, and with the flinging of the water it makes it it work like a squeegee is best way to explain it I gues, and with the sensor Best way to describe that is I have heard it called a DUMMY squeal or DUMMY sensor, when my brakes get low I get a squeal on my JGC. And soon after that if not changed Im metal to metal. Let me look for where I read both of these and post for your enjoyment ;-)
Reply



All times are GMT -5. The time now is 11:35 PM.