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Home> GMC Parts> Power Steering Gear Box

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 GMC  Power Steering Gear Box
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The steering system in your vehicle is very important to control the steering wheel and give you proper handling of your vehicle. Steering gearboxes can vary depending on what type of gearbox your GMC uses. Gearboxes can vary in differences depending on the model of your GMC and how old it is. As more advances are found technologies for gearboxes also change in order to make it easier for you to control your GMC. We are going to take a look at the GMC steering gearbox as well as a GMC power steering box and a manual steering box.

First off, let’s find out what a GMC steering gearbox does. A gearbox changes the ratio between an engine’s rotational speed and the rotational speed of the wheels. Manual gearboxes will achieve this using simple gears while automatic gearboxes will use planetary gearsets. The majority of gearboxes today are used to increase torque as they reduce the speed of a prime mover output. What this means is that the output shaft of a gearbox will rotate at a slower rate than the input shaft. This decrease in speed provides a mechanical advantage thereby increasing torque.

A GMC power steering box will be contained in the gearbox housing where there are usually four line inlets built into the gearbox casing. These lines are connected to the reservoir, the steering pump and two lines to the fluid lines. The rotary valve inside the gearbox sense the pressure applied with the help of the steering wheel. The power steering pump is turned by a drive belt; this drive belt pressurizes the fluid going to the gearbox. The low-pressure line in this system sends the fluid back to the power steering reservoir where it gets pumped out and sent back at high-pressure back to the gearbox. This action is what helps makes steering easier for you and gives you easier handling of the car so you can make turns and change lanes.

A GMC manual steering box is not very commonly used today but was more common in older vehicles. It typically uses a recirculating gearbox, which has a worm gear. The worm gear is a metal block that has a threaded hole in it. The block has gear teeth cut into the outside of it that engages a gear to move the pitman arm back and forth. A threaded rod that sticks into the hole in the block connects the steering wheel. When the steering wheel spins it turns the rod, the rod is fixed so that when it spins it moves the block, which in turn moves the gear in order to move the wheels.

So whatever type of GMC replacement steering box you need make sure to check out all of our inventory. We have excellent customer service to help you pick the correct GMC manual steering box or a GMC power steering box. So contact us today!