"M" brake calipers

[kent olsen]

Does anyone know if you can use a front "M" brake caliper on the rear, replacing the rear caliper.

I have SC calipers on the front of my 72 911 and "M" calipers on the rear. One rear caliper has a frozen piston. I can pull it apart and rebuild it or it looks like I could just take one of the old front calipers and place it on the rear????

[Bill Verburg]

Originally Posted by kent olsen

Does anyone know if you can use a front "M" brake caliper on the rear, replacing the rear caliper.

I have SC calipers on the front of my 72 911 and "M" calipers on the rear. One rear caliper has a frozen piston. I can pull it apart and rebuild it or it looks like I could just take one of the old front calipers and place it on the rear????

You could but you shouldn't

the front M has pistons that are too big for use in back w/ A or S or Carrera A fronts

[kent olsen]

Yeah that's what I thought, kind of a brake bias effect. I guess I'd better take the back one off and rebuild it.

[kent olsen]

Bill

Does that mean that the SC calipers have the same size piston as the "M" just on the 3" spacing??

[Charles Freeborn]

Send it to PMB.
-C

[Bill Verburg]

Originally Posted by kent olsen

Bill

Does that mean that the SC calipers have the same size piston as the "M" just on the 3" spacing??

Yes, all the 911 rear M's from '89-83 are the same, the '84 -'89s all got the bigger pistons, they all have the same 3" mounts