In rear wheel-drive cars, a driveshaft is needed for the tires to rotate. The driveshaft transfers the power from transmission to the rear tires, enabling them to turn.
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U-joints hold the drive shaft in place. If the U-joints are not lubricated, the bearings inside the U-joints will wear out over time and the drive shaft will begin to vibrate, while the car is moving. You will feel vibration in the seat or throughout the car. You may also hearing clunking or banging noise when you put the car in a gear.
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might be a dumb question, but is it ok to use a cheap aftermarket CB?Such as from Amazon or RockAuto ; they appear to be around $15-30I wonder why U-joints wear out. Is it neglect from lack of greasing? Do they even have grease/zerk fittings on them?In which case, maybe after installing new ones, it can help prolong their life by adding 'greasing' to the maintenance schedule?Last time I did something like that was on street car sway bar bushings. For an aftermarket Hotchkis bar kit. The brackets came with zerk fittings so I bought Hotchkis's white clear bushing grease (big tube) and a pistol-grip grease gun on sale from NAPA for like $20, thinking I'd grease them every 5k mile oil change.But even that may have been too frequent because when I did, the old grease getting pushed out still looked good, and there were no symptoms to treat such as squeaking.
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