Do differential covers make a difference?

Strength: Having a stronger differential cover can provide extra safety for pickup owners with high-horsepower engines or for those who head off-road. All of this helps keep the ring-and-pinion gear correctly aligned, provides more protection during impacts, and increases the rigidity of the axle and differential.

What does an aftermarket diff cover do?

In addition to providing access for changing gear lube, differential covers help dissipate heat that can damage differentials, and they protect gears from contaminants like dirt and water, as well as rocks and other large obstacles encountered when off-roading.

Are differentials cast iron?

It is usually made of cast iron but sometimes aluminum. The differential case is illustrated below.

Should I change my differential cover?

An upgraded differential cover allows for you to carry more gear fluid oil. This extra fluid equals greater diff cooling. An aftermarket diff cover can also provide heavy, duty protection for your axle parts. This is a common impact point especially for those that like to take their rig off road.

What metal are differentials made of?

First off, let’s discuss the components of standard differentials or single pull differentials. As previously mentioned, the ring gear is attached to the differential case. It is usually made of cast iron but sometimes aluminum. The differential case is illustrated below.

Are axles made of cast iron?

Axles made from cast-iron withstand greater loads, have better vibration damping than steel and a better wear, heat and corrosion resistance.

What steel is best for axles?

Axleshafts typically use medium-carbon steel. Carbon increases strength but makes the steel less ductile or flexible. Aftermarket alloy shafts often have a higher carbon content than OE shafts and also introduce other metals such as chromium, molybdenum, and nickel into the mix.

What type of steel is used for axles?

Axles are typically made from SAE grade 41xx steel or SAE grade 10xx steel. SAE grade 41xx steel is commonly known as “chrome-molybdenum steel” (or “chrome-moly”) while SAE grade 10xx steel is known as “carbon steel”.