If you aren’t comfortable replacing brake drums yourself, you can always head to a dealership or mechanic and pay to have it done. The average national cost is between $233 and $338 for the entire process. This includes $171 to $217 in labor, and $62 to $121 in parts.Click to see full answer. Moreover, how much does it cost to convert drum brakes to disk brakes? Average cost of power brakes You can expect to pay from $300 to $1,000 to switch from drum brakes to a power braking system, depending on whether you plan to convert the two front wheels or all four, parts for your car and labor costs.Secondly, are back brakes more expensive? Unfortunately, our world is festooned with imperfections, and higher prices for rear brakes just happens to be one of them. If you have rear disc brakes, this repair (with just the standard pad/rotor replacement) will run $25-$75 higher than the front brake repair, on average. Similarly, you may ask, how often should you change rear drum brakes? The brake drums on your car are built to last for about 200,000 miles. In some cases, the drums will wear out sooner due to worn out internal components that put more strain on the drum. As your brake drums begin to wear down, they will actually become smaller.How do you replace rear drum brakes? Dismantle the brake. Remove the shoe return springs. Detach the parking brake lever. Hold the shoe retaining pin from the back and remove the retainer springs. Spread the shoes apart from the top and disengage the shoes from the wheel cylinder pins. Remove both shoes and the self-adjuster as one unit.