Ben

My 1990 944 S2 NA's brakes squek loudly when backing...any suggestion?

Thanks!

Skip

Don't use the brakes

Seriously, first thing would be to check the wear... it may be time for new pads and turned or fresh rotors.

Many times squeaking is caused by vibration of the pad backing on the caliper. Most local parts stores will have some brake "anti-squeal" compound. This is applied to the pad mating surface relative to the caliper (pots in your case). Do not get it on the friction area or the rotor.

Good Luck!

IceShark

Naw, Skip. It is on backup. My guess would be parking brakes or trailing end pistons on a normal caliper ain't retracting so good. Could be a sign to reburb/clean up some units.

Ahmet

I'd suggest cleaning the moving parts, and lubricating them with high-temp grease. Also, you can try some backing plates designed to keep brakes from making noise. (all they do is absorb vibration)
Ahmet

Skip

Oops, still learning to read... missed that part.

Skip

Olli Snellman

Check out the pads if they are worn outCheck olso that behind the pads are the original thin metal plates which are there for eliminating sweeks.I have seen few people to remove this plates for some reason!!??. Since S2 has same breakes as 951 i don't think that pistons them selves are stuck.Usually they move just fine, even here in Finland where we have very cold winters and lots of salt on the roads during winter time.Check olso the rotors, if they have worn too much it can make your breaks to sound odd.
Olli