Brake Noises

[M1A2]

I recently had my front brake pads changed and rotors turned, and now I ocasionally hear a dull thump when I apply the brakes. Doesn't do it all the times, mainly after I have driven it for at least 20 30 miles (warm) and most often during turns. Any ideas? I took it back to the shop and they changed the pads again and said they where bad. Does it less now but every once in a while I hear it. I have had somebody stand in a parking lot and they say they can hear it too. I read something about the pads having to be glued to the caliper? True or False.

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1999 FLAME RED 2500 SLT, QC, 4X4 AT, 3. 54 AGATE LEATHER

 

[Ram_Kowboy]

I have seen several things cause a thump like what you are experiencing. For instance, If the pad is not snapped into its proper place in the caliper. Or if the bottom caliper mounting bolt is left loose. But I kinda doubt both of those scenerio's. If the rear brakes are a ways out of adjustment then they will thump when the pedal is applied. I have seen the rear brakes thump if a axle seal is leaking also. If your front brakes are worn out, then more than likely the rears are past due for some adjustment. I have also seen loose front end parts cause thumps when the brake pedal is applied. How's this for some ideas to look for?

As for glue on the brake pads. I think what you are refering to is a silicon based adhesive sold by some aftermarket companies. Its purpose is to reduce vibrations thereby reducing brake squeals. I have seen it in two different colors, orange and blue. When applied between the caliper and the pad it looks like a squished smurf. Some folks like it and others do not.

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98 Properly Valved 4x4 SWB QC ISB A/T Metallic Red w/ tan cloth interior, DC nerf bars, DC two piece mud-flaps, 275 h. p. injectors, Monroe Gas Magnums, Armor Tuff spray in bed liner, Goodyear Wrangler ATS 285/75r/16, BD Heavy Duty Valve body. Walker 21468 thru flow muffler,Cobra 29 NWST CB. American Racing Wheels. Power Edge EZ control module.

 

[Bigramguy]

We see that problem alot after a brake job. 9 times out of ten,it is the inboard pad is slightly undersize and does not fit snugly into the opening in the knuckle. Some aftermarket pads are worse than others,and rebuilt pads are terrible. What happens is when you step on the brakes,the inboard pad slides forwards a bit a "thumps" or clicks against the knuckle. It easy to check when the pads are being installed,just take the inborad pad,with the caliper off,and check the fit into the knuckle. Make sure the pad isn't sloppy. Also check the two "ears" and how they fit into the caliper. If they don't fit well get a better set of pads,or if you want to use the ones you have you can "peen" the edges out a bit with a centre punch. Tell them to try another set of pads,something better,and to check them when they are going on. Stay away from the silicone based product for the back of the pads,as they don't work well on the ram,in my experience. Any good set of pads will have a metal shim on the back which has the same effect as the silicone,to stop squeal. Hope this helps

Chris