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U Joints

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Old 05-21-09, 07:30 PM
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Question U Joints

What do U Joints do? Mine on by 83 RX7 are squeeking, and I'm told they need to be replaced.
Old 05-22-09, 09:54 AM
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U-joints allow the ends of the driveshaft to move laterally. This is so the rear end can move up and down, the transmission can bounce a little and any misalignment in the driveline is compensated for.

Most communities have a driveline shop that can replace the u-joints for a reasonable cost.
Old 05-22-09, 02:01 PM
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time out aaron. dont you have to replace the whole drive shaft as the u joints are not replaceable?
Old 05-24-09, 08:51 AM
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If you go to a drive train specialty shop, they can replace them. But, yes "officially" from Mazda they are not replaceable. A typical auto repair shop won't be able to do it, but a specialty shop will.
Old 05-24-09, 09:51 AM
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What he said. A driveline shop can also build you a shaft using any U joints you want. My shaft was built to take Dodge truck joints which are strong and inexpensive.
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