On Wed, 27 Nov 2002, Robert L. Gannon wrote:
> Question to the List
> Most manuals recommend that when removing the driveshaft, you should
> mark the flanges, so that when replacement occurs, you can put it back
> the same way. Why? If a shaft is balanced, what difference does it
> make?
The answer is that the shaft is dynamically balanced (actually _was_
balanced at the factory). The flanges to connect the drive shaft to the
tranny and diff are asymetrical, so it is possible to install 180 degrees
out of phase.
Frankly, you probably won't notice any vibrations if the shaft is 180 out,
but you might have small vibrations as a result. YOU DO NOT WANT SMALL
VIBRATIONS IN THE DRIVELINE!
One odd thing I have seen on several occasions from unblanced drive shafts
- the crank pulley working loose (with subsequent damage to the
crankshaft!)
So it is a good idea to check the balance of the whole assembly if you
can. If you've swapped motors, trannies, diffs and who knows what else,
you just have to take your chances.
> Robert L. Gannon
> trsix74@comcast.net
> TR6 1974 CF22956U
> TR3A 1960 TS70951L
> http://hometown.aol.com/twodzusfittings/myhomepage/auto.html
I wouldn't lose any sleep over this, but if you are taking your 6 apart
and you know it to be factory original, then you should mark things when
taking them apart.
rml
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