Originally Posted by LargeCar
2009 Carribean on a Freightliner XC chassis.
Has anybody done a drum to disc brake conversion?
Wondering if I can just change from the spindles out or if an entire axle change would be required. What about a proportioning valve, is it required?
Just tired of trying to get those danged squeaking brakes fixed. Maybe a full on complete brake job is in order. New drums and shoes. But then what do I do when they go to squeaking again?
To many questions.
Drum brakes are better than disc for not dragging and simpler parking brake. Performance is similar, disc can disappate
heat faster. But that under extreme braking, otherwise no advantage to user. I agree with Chuck, mfg do testing and design iterations after market typically doesn't, so I talk to one who has lived with a conversion before spending 10k.
Technically the noise comes from a vibration, probably excited from shoes doing instantaneous stick/slip. The noise comes from something that resonates/ vibrates as a result to excitation force. There are apps that measure the noise frequency. See if same noise in all stopping conditions. Usually each noise comes from a different place with brakes. As an engineer, I'd say something is out of specs. And in your case a manufactured, not from wear. If warranty is not a choice, then I'd change shoes to softness material available. Long life shoes typically will cause noise more often Are your shoes bonded well to shoe metals? If the S cam is often a problem get highest temp brake lube and use on it. Both on pivot and contact surfaces. For sure Id replace some brake hardware & shoes before thinking of disc. Good luck