Engine/Transmission (1998.5 - 2002) rear brake squeek and lockup

[RConner]

I have a 99 with a EGR front brakes and rear pads and cylinders. Since I have installed the rear pads the drivers side started to squeek bad, I also put on new drums from advanced auto, cheap inports. The worked good for a few miles then it started to squeek. Also if I am on wet pavement, especially first thing after I start up in the morning the drivers side will lock up with the littlest push of the pedal. I have also replaced the cylinder with a new one and it diden't make a differene. I have also sanded down the pads and it stops for a few miles then will squeek again. Any advice would help.

 

[RConner]

Anybody... ... ... ... .

 

[jelag]

I don't own a 99 and I can only assume that you have rear drums... . you confuse your terms so badly in your post I can't tell whats up... but this is the areas I'd go to fix your problem if you have rear drum brakes... .



If you have rear brake shoes and drums..... noise is caused by a high speed chatter... . this vibration will cause the noise or sweek that you hear... . it has several causes...



1 - the brake lining is glazed over... . has a very shiny surface and sometimes you brake the glaze with sandpaper...



2 - you have the wrong friction for the application... . usually very cheep, friction tends to glaze over and chatter... inexpensive friction is usually too hard... .



3 - some applications have a primary shoe and secondary shoe... the primary shoe has a smaller amount of friction on the backing steel, and the secondard shoe has more friction on the backing steel... . the primary and secondary shoes are not interchangeable... . the primary shoe must face forward... and the secondary shoe must face backwards... if you have both primarys on the same side. . or backwards this can cause your noise...



4 - all drums and rotors built for our market must be DOT approved... . in that the metal in the drum or rotor must conform to a ASME, SAE, or other such standard... those manufacture offshore making these products most likey make them for the OEM's... . I can almost promise you that there are no drum and rotor OEM's in this country making stuff for the car manufactures... . oh they might be american owned but not manufactured here... .



5 - if you didn't replace the springs and other related parts... . and you didn't lube the friction points... . in other words, didn't apply the correct lube to the metal to metal contacts where the shoe hits the backing plate, and where the anchors attach the shoe, vibrations can develop...



6 - when you put on the new shoes... . did you open the bleeder on the wheel cylinder and run the dirty brake fluid on the ground or did you just compress the cylinder and push the dirty brake fluid back into the master cylinder... . or did you replace the cylinders... . its important to run clean brake fluid from the master cylinder to the wheel cylinders before you start the bleeding process... . any moisture in the wheel cylinder will turn to steam during the braking process and cause braking problems as well... .



If you have rear disc brake's please post again and I'll write a second post regarding the noise from disc brakes... .



Hope this helps.....

 

[steved]

I have a 99 with a EGR front brakes and rear pads and cylinders. Since I have installed the rear pads the drivers side started to squeek bad, I also put on new drums from advanced auto, cheap inports. The worked good for a few miles then it started to squeek. Also if I am on wet pavement, especially first thing after I start up in the morning the drivers side will lock up with the littlest push of the pedal. I have also replaced the cylinder with a new one and it diden't make a differene. I have also sanded down the pads and it stops for a few miles then will squeek again. Any advice would help.

Sounds like the shoes are absorbing moisture... I had a set of organics do this same thing... replaced them with semi-metallics and it went away...



You might also want to check the proportioning valve to ensure the rod is still connected to the frame. If it is fully "on" (because the rod has popped off), it will cause the rear brakes to lockup easily...



It also sounds like you might have the shoes adjusted too tight in the rear... that will cause squeeking too...



steved

 

[RConner]

I really appreciate all of the replys. I do have rear drum brakes. I am using EGR's pads I believe they are a kevlar compound. I don't know if there are primary or secondary shoes, I will call egr and ask. I did notice that they are glazing, and I have sanded them which stops the squeek but it soon comes back. Mabye my pads were contaminated. I put them on after they sat around in my garage for a year. I was waiting for the originals to wear down. They squeeked with my original drums so I put on the new ones and it stopped for a while they came back.

I also noticed when I put on the new drums that one of the pads has less material on it??

Everthing is cleaned and lubed properly and I use a pressure bleeder to bleed the brakes?

I did not replace the springs but there is only 60,000 miles on my truck and they appeared to be fine. The cylinders have also been replaced they came with the EGR kit.

I have tried to adjust them which temperally fixes my problem but it always eventially comes back.

I also will check the proportioning valve