mh6 Posted January 27, 2006 Share Posted January 27, 2006 I am going to be doing some brake work this weekend, I am tired of the clunking nosie from the front brakes and this brake pulse thats happening as mentioned in my last topic. Time to jump in and found out what the heck is happening. I am going to replace the fliud first as I can not verify when or if its been changed. I want to do a good R&R of the brake fliud, will I need to do some special step to insure that the fliud in the ABS is replaced ?? Second..... what are your suggestions on this brake clunking noise.......the pads are moving within the caliper housing causing the clunk when going from reverse to drive. Use to be smooth as glass and no clunk, what has happened now I am very disappointed about the problems I am seeing with this RX after owning it a year now. Thanks for your time and effort :) Quote Link to comment Share on other sites More sharing options...
RX in NC Posted January 27, 2006 Share Posted January 27, 2006 Changing your brake fluid is fine but I do not believe that it will resolve the problem you've described here and in your previous post. You indicated that your current brake fluid appears clean and is at proper fill levels, so it is far more likely that you have a mechanical problem within your braking system. I assume that your pads still have plenty of wear left and that you are not metal-to-metal on the rotors (or getting very close to metal-to-metal). Brake noise can sometimes be difficult to pinpoint once you've ruled out worn pads or rotors. Sometimes the pads change their seating, sometimes shims that should have been installed were not and it takes time and wear to make the brakes begin to get noisy, sometimes foreign substances get on the pads or rotors and cause noise, sometimes a warped rotor is the culprit, etc. etc. etc. Good luck with your analysis this weekend and here's hoping that you can pin down the problem and fix it. Quote Link to comment Share on other sites More sharing options...
monarch Posted January 27, 2006 Share Posted January 27, 2006 Second..... what are your suggestions on this brake clunking noise.......the pads are moving within the caliper housing causing the clunk when going from reverse to drive. Use to be smooth as glass and no clunk, what has happened now I am very disappointed about the problems I am seeing with this RX after owning it a year now. Read this thread to learn how independent car repair shops may sabotage Toyota / Lexus brake systems: http://us.lexusownersclub.com/forums/index...topic=27176&hl= No owner should reasonably expect factory original brake performance from a factory system that has altered For $10 you can download a factory repair manual at http://techinfo.toyota.com/ to learn how the brake hardware should be installed and the recommended brake bleeding sequence. Use factory pads, factory hardware and factory brake fluid http://i5.photobucket.com/albums/y189/mastertech/rxbf.jpg if you want factory original brake performance. Quote Link to comment Share on other sites More sharing options...
mh6 Posted January 27, 2006 Author Share Posted January 27, 2006 Thanks guys, yeah the pads are good.....brake job done at Lexus dealer where I bought it one year ago. However having looked over the records, brake fluid change does not up show up anywhere that I can see. Some of the history of this RX is missing ...meaning nothing on record. It acts like something intermittent,,,,,was suggested to remove the ABS fuse and see if its still there. Is it ok run that way ??? unsafe ?? or damaging ?? I was unsure about proceeding further with that. The reason I am wanting to replace the fliud is that the brakes are a little soft ......not really spongy ...yet not a distinct hard push. You know what I mean. I am all over that $ 10 download when I get home........is it the entire manual ?? Quote Link to comment Share on other sites More sharing options...
mh6 Posted January 30, 2006 Author Share Posted January 30, 2006 Thanks for the link to get info.......lots of info however I could not find where it talked about the procedure for R&R of brake fluid. So the questions is what is the proper procedure for a complete replacement of brake fluid with ABS onboard ?? I jumped into the brakes this weekend and the first thing I found was the following: The front brake pads do not match what is in the manual by look, mine are 2 stud top and bottom and the manual shows 1 stud pads. Also these brakes pads do not sit snug and such in the caliper hosuing .....there is a 1/4 gap and that whats causing the clank when going from reverse to drive. I could not find anywhere on the net that showed the 99 RX300 having the 2 stud pads I have So I start calling this morning....keep in mind that the Lexus dealer where I bought it did the brake job 10 months ago, my bud at Toyota tells me the numbers on the back of the pad are worthless for tracking down info. I call my Lexus dealer and talk to the parts dude which I explain the situation and he looks up some numbers and this is what he had to say: Lexus number front pads #04465-48060 (1 stud) is what the 99 RX300 AWD calls for as its front pad. #04465-48050 (2 stud) like mine now .......... can work "OK" but is not the listed pad for the 99 RX300. He thinks thats were the clanking problems lies as well.........I took pictures and I need to post them. big frigging gap in there no wonder they are clanking....surprise they did not start clanking right away. Apperently the pads were held in place with some type of glue........perhaps thats the wrong word for it. Some type of pliable yet pretty hard substance that the brakes pads have come loose from thier shim plates and this allows the pads to move feely in the housing. It seems that the 00-02 models take different pads according to him. So at this point I dont know what to think.....been driving around 10 months with the wrong pads on Clanking noise is for the birds....should not be making such a noise.........never have had a vehicle that did and I owned a couple of Toyota and Nissan's and never have had such issues. It seems that it eveything is a mystery when it comes to Lexus parts .....just went through the same nut roll with the Transmission Pan gasket. Now I have read some artilces here that say the 1 stud pads dont fit ....the stud is too big ..... so now where does that leave us And of course still trying to track down the brake pulse Perhaps I should have started anew thread with this info. Quote Link to comment Share on other sites More sharing options...
Ericok Posted February 1, 2006 Share Posted February 1, 2006 Not sure what you mean by "studs" but if you're referring to the rivets that hold the friction material to the backing plate, they're not really an issue. Depending on the manufacturer, some friction material is riveted and some is bonded to the backing plate. If your description is accurate, your problem is that you have the wrong pads installed. The pads are not held in by "glue". What looks like glue is the anti squeal goop that is put on the shims. The pads hare held in place by having the backing plate fit very snugly into the caliper carrier (along with a few anti-rattle clips). Yours don't fit tightly and the slop allows the backing plate to slide back and forth in the carrier causing clanking. Quote Link to comment Share on other sites More sharing options...
mh6 Posted February 1, 2006 Author Share Posted February 1, 2006 Sorry.......what I mean by "studs" are the post top and bottom on actual brake pad shoe that are used to secure the pad assym. in place on the caliper housing. I concur ...the books call for a 04465-48060......and a 04465-48050's are on there now. Getting ready to call Lexus service manager and discuss the course of action they will take. Quote Link to comment Share on other sites More sharing options...
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