On older cars and trucks, swapping drum brakes for discs is a popular upgrade for better stopping and easier service. It is a rewarding job if done right. Here is what to know about converting drum brakes to disc.
Why convert
Disc brakes shed heat better, resist fade, and are simpler to service than drums with their springs and shoes; see how drum brakes work and drum vs disc. On a classic or a work truck, a disc conversion is a real safety and convenience upgrade; see classic car brake upgrades.
Use a matched kit
The right way is a conversion kit engineered for your vehicle, with matched calipers, rotors, brackets, and hardware. Mixing mismatched parts can upset the front-rear balance or cause clearance problems - a kit takes the guesswork out.
Mind the hydraulics and balance
Discs and drums need different fluid volumes and pressures, so a conversion may require a proportioning valve or master cylinder change to keep braking balanced; see how disc brakes work. Getting this wrong makes the brakes grabby or weak at one end.
Do it thoroughly
Bleed the system fully, check the parking-brake provision (rear conversions), and bed in the new pads. A proper conversion transforms how an old vehicle stops. Fit quality pads and hardware.