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Driveshaft vibration after all new components except the shaft... 700 1990

posted by  Chris Mullet on  Sat Jan 7 21:07 CST 2023
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last visit: Fri Oct 24 09:08 CST 2014
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It sounds like that driveshaft has a fairly sketchy history. Who knows, someone may have bent the end by improperly pressing the u-joint cups in or out. I would be looking for a new-to-you drive shaft at the wrecking yards and put a new, or known good, u-joint in it. Note: I believe there were two different size u-joints that year so you may want to shop carefully.

Do the forward and rear shafts have keyed splines to assure the two shafts are fased correctly? The ‘90 740 we had was keyed.

Speaking of that car we had, the output bearing got rather sloppy and yet the seal wasn’t leaking.






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New Driveshaft vibration after all new components except the shaft... [700][1990]
posted by  Will740turbo subscriber  on Sun Dec 4 03:07 CST 2022 >


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