Latest Posts

How to Look Up a U-Joint By Size

Do you need to replace a U-joint but don’t have the part number? Don’t fret. We have just the solution for you: our U-joint lookup tool. All you need are the u-joint type and the measurements.

To give you the peace of mind that you’re getting the absolutely correct replacement U-joint, we’re going to discuss the different types of U-joints, how to get the right measurements, and how to use the GMB U-joint lookup tool.

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U-Joint Failure Modes & Troubleshooting

The universal joint (U-joint) is a common part found on any rear-wheel drive or four-wheel drive vehicle, especially body-on-frame designs such as trucks and SUVs. The U-joint’s purpose is to transfer power to the driveshaft when the transmission and axle are at differing planes (heights). U-joints are always in pairs, usually at either end of the driveshaft.

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The 3 Most Common Causes of U-Joint Failure

While any rear wheel drive vehicle can have a universal joint (u-joint), they’re typically found on pickups and SUVs. U-joints connect the driveshaft to the transmission and rear differential, and they allow for a change in the angle of the driveline. This way, the vehicle’s rear axle can move up and down without breaking the driveshaft.

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