Do the U-joints on the driveshaft really have to be lined up with each other?

[u3b3rg33k]

I left my OE tailshaft bolted to the diff when I did my 5 speed swap over 30k miles ago.

Got the wrong model year CSB, so I widened it to make the holes line up (stick welder + water sprayer to keep the rubber happy).

I'll let you know when I start to see problems.

[Schwarz325]

I finally found the marks and aligned them. Now the car vibrates when it's idling, but it slowly goes away and comes back lol..it's pissin me off

[nando]

well vibrations at idle can't be the driveshaft, because it isn't moving when you are stopped.

[Schwarz325]

I think i put too big of a spacer underneath the driverside motor mount, so i'm gonna try a smaller one

[Schwarz325]

well i drove it some more and it seems like the vibrations are still there when driving, especially when i first take off, it's resonance/vibration all over the cabin.

couple questions?

can you overtighten the bolt that holds the 2 piece of the driveshaft together?

and i also never preloaded the csb? would that have anything to do with it?

The csb didn't just slide on the d/s, i had to basically tap it on there, and it took a bit of force, is this normal?

[328ijunkie]

The CSB is pressed on and ive never noticed the difference between preloading and not, ive done it here or there on my own cars and never noticed a difference. As far as aligning the DS goes, there should be factory paint marks, if theyre not there for whatever reason the Bentley describes what JGood Mentioned as a plan B...