Front brakes on 1999 altima squeal rotor and pads are new tried spraying the patrs with brake cleaner but it still squeaks when i first step on brake pad not when i stop all the way

front or rear.??? my guess front.... wild guess.
if car has pads with the noise makers this is normal and the early warning.
if pads are thick (why not look first???) and squeal.?

1. this is normal all disc brakes squeal, can and will if they want to.
2. or has missing anti-squeal shims on pad due bad mech. serv.
3. or not using anti-squeal glue on back side of new pads.
4. if in a perfect world they can in fact squeal.

if you have new rotors and pads and all above is good. they may not squeal. the rotors can be tad bump and the pads will resonate to this rotor surface, its harmless this. only annoying.

other factors, why not do a full inspection of the pads and rotors
first and not just guess and wonder.
like:
OMG:

• Cracked rotors
• leaking DOT 3/4
• calipers guide pins seized.
• Pads shot
• missing parts, the FSM shows all parts as does jeep parts page.
• rotors shot , worn illegally thin, warped, or just ugly bad and old.

this is what we call SOP
standard operatiing proceedures.

Sounds like you may have had soft compound brake pads before and now been replaced with metal compound pads.metal pads great for long wearing and long life but squeal a lot and are harder to stop the vehicle.

you can try to give front brakes a good pressure wash or hose the dust off as this is usually the reason for the squealing.

Did you replace the rotors when you did the brakes? Old rotors will have a ridge the the new pads will ride on and squeal. Second, it is possible that the caliper is hanging up. That will make your new pads ride the rotor all the time and squeal like crazy. You can either rebuild the caliper, or replace with new. I replace with new myself because the old caliper is probably pitted inside and making it hang up. Good luck.

A metal on metal sound? It could be due to worn down brake pads and the squealing is how the engineers designed the pad to let consumers know they needed to be changed. It could also just be dirty. Go out and buy an inexpensive can of brake cleaner and spray the rotors, pads and calipers on both sides very well. If the squeaking continues it's probable that you need new brake pads.

Make sure the mechanic checked the park brake shoes inside the rear rotors, they quite often break away from the lining and get wedged in the rotor, sometimes causing a constant squeal noise. I've also seen the brake pad anti-rattle metal clips become loose and wander in the caliper bracket, they lightly rub against the rotor and cause a squealing noise similar to worn brake pads. They are also very bad for the backing plates rusting out prematurely and rubbing on the inside of the rotor. Other than that he can just try to champher the edges of both front and rear pads to help dissipate the brake dust, from collecting and causing squeak noises.

check the dust shield that is behind the rotor. It should be attached to the steering knuckle. if it is bent and touching the rotor it will squeak. I would jack the passenger side of the car up and remove the wheel. Once you have done that try to spin the rotor. Try to get it to squeak. It may also be dirt on your brake pads. If it came back after a week it is most likely dirt. Try a couple cans of Braklean while you have it apart.

have your brakes checked. the squeling noise is probably the rotors coming in contact with the wear stud on the pads.

you need to grease the metal clips at the top and bottom of the pads (dont get grease on the rotor or pad though) and also spray some "disc brake quiet" on the back of the pads. it comes in a red can and the spray that comes out is like sticky red paint. do those 2 things and the squeals will be gone.

Did you buy factory pads or get cheap aftermarket pads? If aftermarket did you get the ceramic? The cheap aftermarket ones tend to squeal pretty bad. Like the last comment on here, you should have your rotors turned whenever you change the pads.

If it isn't the brake pad worn out, then it is the brake backing/dust guard sheet metal shield ( AKA backing plate), take a suitable device like a large screwdriver and bend the backing plate away from the rotor. Problem solved.