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Drive shaft problem....

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Old May 2, 2012 | 02:03 PM
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Default Drive shaft problem....
i have a 93 sc300 NA-T and i just did a 5speed swap with a w58...everything is installed and pulls fine BUT it has a very bad bump sound coming from the center where the shifter is...I know its the drive shift but i dont know why..the trans mount seems to be fine and center shift mount also...And when i say bump,i mean BUMP,Its like the whole car is shaking and going to fall apart...The more RPMs the worse it is..
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Old May 2, 2012 | 02:12 PM
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Did you check the u-joint?
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Old May 2, 2012 | 03:53 PM
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Like a dumbass i didnt but im pulling the diff out to weld it right now and ill check the u-joints
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Old May 2, 2012 | 08:12 PM
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You know that the driveshafts are in balance, and have to be installed a certain way right? but yeh u-joints my next guess.
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Old May 2, 2012 | 08:37 PM
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Originally Posted by g4ebguy90
You know that the driveshafts are in balance, and have to be installed a certain way right? but yeh u-joints my next guess.
yup that also.
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Old May 2, 2012 | 09:20 PM
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installed certain way????enlighten me plz fine sir......
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Old May 3, 2012 | 02:03 PM
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If you ever noticed a small couple of square things on your driveshaft, those are weights. Think of your driveshaft as a wheel needing a balance. If you do not install it a certain way it will be out of balance. They either are welded or stickied on sometimes they fall off.
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Old May 3, 2012 | 07:21 PM
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it could be coming from the carrier bearing , that bushing gets worn out and break and you hear a tumping noise fron the center console.

The U joints on the driveshaft will do that also, specially if the swap was from an old SC.
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Old May 3, 2012 | 10:49 PM
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im thinking the carrier bearing but im pulling the driveshaft Saturday and check everything and ill take some pics//
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Old May 10, 2012 | 01:19 PM
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Ok guys just to let you know..the drive shaft thing was my fault for rushing to get it together....if you know at the end of the drive shaft there is a rubber donut with 6 holes......lol i was only using 3 of them holes...so i had it thru the drive shaft and st8 to the diff......lol as soon as i jacked it up i was like ****...lol but thanks for the help guys..close thread plz
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