How would a universal joint be checked for wear?

Large U-Joints can be inspected for extreme wear by twisting the propeller shaft back and forth. Smaller joints can be tested by prying the trunnions back and forth with a large screwdriver.

How do I check my u-joints?

You will need to measure from the edge of one snap ring groove straight across to the edge of the other snap ring groove. For U-joints with outside snap rings, you will need to measure from the edge of one u-joint cap straight across to the edge of the other u-joint cap.

What might happen if a universal joint is worn?

Vibration felt throughout the vehicle while moving forward at speed. This vibration means that the universal joint bearings have now worn enough to allow the driveshaft to move outside its normal rotational path, causing imbalance and vibration.

When Should u-joints be replaced?

When there are signs that the joint isn't 100%, always replace it. In other words, when in doubt, change it out. Even if the u-joint is a little loose, it's still better to buy a replacement u-joint now than it is to let the u-joint worsen to the point of complete failure.

Should I replace both u-joints?

So when you need to replace a u-joint, always replace the other one too. If you don't, the other one will fail sooner or later. The failure of that u-joint will cause damage to the new u-joint (that replaced the first one). It's always better to replace both u-joints at once.

How to Diagnose and Replace Universal Joints (ULTIMATE Guide)

What causes a universal joint to fail?

Heavy loads, shocks, vibrations due to misalignment, material wear can lead to loose play (backlash) within the bearings which can ultimately lead to joint failure.

What is a slip yolk?

The slip yoke is a vital part of your vehicle's drive shaft and is what allows the shaft to flex when going over rough, uneven terrain. This flexion gives your drive shaft's U-joint the ability to continue rotating properly in more demanding conditions.

What are the different types of U-joints?

There are two types of U-joints, the cross and roller type and the ball and trunnion type. The cross and roller type is used the most; it allows the drive shaft to bend. The ball and trunnion type less frequently used; it allows the drive shaft to bend and also permits backward and forward motion of the drive shaft.

Can a worn u-joint cause vibration?

If your car vibrates from the middle or rear of the car, particularly at highway speeds, you may have a bad u-joint. A tell-tale sign of a worn u-joint is a clunking feeling or sound when you shift your vehicle into drive or reverse.

How long do sealed u-joints last?

U-joints can last decades, or they can break when the vehicle is still new. That's why it's a good idea to check the u-joints at every oil change. A typical rear wheel drive vehicle has 2 or 3 u-joints.

How much does it cost to fix an AU joint?

The average cost for u-joint replacement is between $240 and $288. Labor costs are estimated between $108 and $137 while parts are priced between $131 and $151. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.

How do I know if my drive shaft is worn?

What is a u-joint in a car?

Universal joints are X-shaped parts typically made of steel with a bearing cap at each end that allows the vehicle's rigid driveshaft to connect to the transmission and rotate freely.

How long do driveshafts last?

While there is no set lifespan of a driveshaft, it typically can last about 75,000 miles. Keep in mind depending on the vehicle, and wear and tear you may get much less or much more.

Are U-joints hard to replace?

Replacing these joints is a fairly straightforward job, though it takes some prior experience. To begin, you'll need a universal joint pressing tool. You can also take advantage of the loaner tools program at your local Advance Auto Parts store. Then follow these step-by-step instructions on how to change U joints.

What are some signs of u-joint failure?

Do you grease u-joints?

Be sure to grease your u-joints every 5,000 miles (or as recommended by the manufacturer). They'll likely last longer than permanently sealed u-joints.