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<blockquote data-quote="swampratt" data-source="post: 3487278" data-attributes="member: 15054"><p>You can pack too much grease in a ball joint or tie rod and end up breaking the seal.</p><p>I have seen mechanics pump grease into them until it pumps out of the rubber boot seal.</p><p></p><p>The very old cars had more of an umbrella type rubber cover to protect the joint from road debris.</p><p>Those can be pumped until it comes out as they were not water tight either so it would also push out any muddy water.</p><p></p><p>Today most joints are sealed very well and both ends of the rubber are captured and nothing gets in.</p><p>You pump that until it oozes grease and you just broke the seal.</p><p></p><p>U joints with Zerks were not usually installed on factory vehicles.</p><p>You can get them with it and you also get a hollow U joint and that is weaker than a solid one.</p><p>You can pump too much grease into a U-joint and make it act like it is hydraulically locked and it will fail sooner.</p><p>The clearances on the caps are very tight and this is where the lock up occurs. There is no where for it to go.</p><p></p><p>Well unless it is worn out a bit then it will come out.</p><p></p><p>I change my transmission fluid every other oil change 3,000 miles between oil changes.</p><p>Just pull the drain plug and replace what drained out.</p><p></p><p>Synthetics oils and greases are used in my cars and trailers.</p><p></p><p>Brake dust will get washed off when I take it to a car wash after the oil change.</p><p>That and all the mud etc.</p><p></p><p>When I get a new to me vehicle I power wash the under side and blow it dry and paint the undercarriage.</p><p>With rubberized coatings and or gloss black paint.</p><p></p><p>Sure makes it nice to work under a clean vehicle.</p><p></p><p>There are some heavy duty greasable u-joints with a smaller diameter hole in them and "No bearings" so not all are the same as we know.</p><p><a href="https://spicerparts.com/parts/driveshaft/performance/spicer-extreme-u-joints" target="_blank">https://spicerparts.com/parts/driveshaft/performance/spicer-extreme-u-joints</a></p></blockquote><p></p>
[QUOTE="swampratt, post: 3487278, member: 15054"] You can pack too much grease in a ball joint or tie rod and end up breaking the seal. I have seen mechanics pump grease into them until it pumps out of the rubber boot seal. The very old cars had more of an umbrella type rubber cover to protect the joint from road debris. Those can be pumped until it comes out as they were not water tight either so it would also push out any muddy water. Today most joints are sealed very well and both ends of the rubber are captured and nothing gets in. You pump that until it oozes grease and you just broke the seal. U joints with Zerks were not usually installed on factory vehicles. You can get them with it and you also get a hollow U joint and that is weaker than a solid one. You can pump too much grease into a U-joint and make it act like it is hydraulically locked and it will fail sooner. The clearances on the caps are very tight and this is where the lock up occurs. There is no where for it to go. Well unless it is worn out a bit then it will come out. I change my transmission fluid every other oil change 3,000 miles between oil changes. Just pull the drain plug and replace what drained out. Synthetics oils and greases are used in my cars and trailers. Brake dust will get washed off when I take it to a car wash after the oil change. That and all the mud etc. When I get a new to me vehicle I power wash the under side and blow it dry and paint the undercarriage. With rubberized coatings and or gloss black paint. Sure makes it nice to work under a clean vehicle. There are some heavy duty greasable u-joints with a smaller diameter hole in them and "No bearings" so not all are the same as we know. [URL]https://spicerparts.com/parts/driveshaft/performance/spicer-extreme-u-joints[/URL] [/QUOTE]
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