What Causes Premature U Joint Failure?
U joints are designed to take a lot of stress, but there are some factors that can accelerate the wear and tear on these parts.
How to Break a U Joint
Besides having a u joint with a defect from the manufacturer there are some circumstances that can cause a u joint to fail. Here is a list of some of the most common issues that can precipitate u joint failure:
- Vehicle Modifications
- Driving Style and Vehicle Use
- Lack of Lubrication
If one of these variables applies to you or your vehicle then it would be worth it to check out more durable u joints or u joints with a zerk fitting that allow for grease maintenance of the bearings. Below is a more detailed description of each of these issues.
Vehicle Modifications
Many times u joints can be excessively stressed by certain vehicle modifications. Additions such as suspension lifts that change the angle of the drive line make the u joints work harder and can shorten their lifespan. Also, engine power upgrades can put extra pressure on the drive line and u joints which can cause them to operate at an RPM level that was not intended when they were designed and manufactured.
Rough Terrain/Driving
Driving style and vehicle use is another potential cause for premature wear on u joints. Serious off-roading can shift the drive line to extreme angles and test the limits of the u joints. Racing or track time where the vehicle is consistently operating at high RPMs can also lead to excessive wear of the u joints.
Lack of Lubrication
Loss of grease in the u joint can result in an unlubricated, metal-on-metal contact in the bearings and will eventually wear down those inner surfaces. This can be the result of a busted seal or excessive hard use wearing the grease out.
* More information about causes of u joint failure.
