The drum brakes on GM 14 bolt axles are disappearing, and no one is going to miss them. Drum brakes have a lot of limitations, and 14 bolt disc brake conversion kits are more affordable than ever (click here to see for yourself).
If you’re wondering what a 14 bolt axle is, you may not be alone. This type of axle is called a “14 bolt axle” because 14 bolts are used to attach the rear differential cover to the differential case. GM has been putting this axle in 3/4 ton and 1 ton trucks since 1973. It is a very durable axle, and millions of them have been produced.