So I have a 92 sc400 and just did the Ls400 brake upgrade. Well ever since then the make a metal on meta high pitch squeal at low speeds when trying to stop. I cut the dust shield to make room for them does anyone have ANY ideas what could be make that noise? Ps I got organic pads

 

check if you put the pads in backwards? i've seen pictures of people doing that.. that would make it metal on metal

first thing to do would be to take the wheel off and maybe caliper to see what is grinding, as that would cause the metallic noise. anything that is grinding will be shiny / noticeable if you get lucky.

 

Did you use the stock SC300 bolts.......you need to use some washers on the bolts or else it will come in contact with the backside of the rotor

 

I have checked the pads and they are good. As to what bolts I used the stock ls400 ones Also doesn't look like anything is touching the backside of the rotor

 

Is it the dust shields? They need to be trimmed or bent back out of the way.

 

Turn the rotor with the wheel off and you should be able to find the culprit.

Steve

 

did you grease the back of the pads?

 

I cut a good amount off to fit the rotor.

Yeah that was going to be my next step was to turn the rotor without the wheel on.

And yup I did put that noise reducing grease on the back of the pads.

I was also thinking of upgrading the pads to the semi metallic brake pads with the built in shims instead of stick on shims. I'm thinking maybe the shims have failed in some way

 

Occasionally I get a squealing because whatever dust shield I have left has bent back into place and is rubbing. I'm getting it completely sawed off in a few days at a shop.

 

That's what I'm thinking of doing maybe this weekend