Tailshaft balancing

[alfa331.7]

Hi all managed to change my rear engine mount and a donut /tailshaft coupling closet to the engine this morning but I now have vibration coming from tailshaft when I drive it

I have read up this afternoon that they need to be balanced

Who in Sydney offers good service on balancing a tailshaft without charging 2 arms and 1 leg ??

The car is an Alfetta sedan with a twinspark gbox

[giulia_veloce]

Hi Alfa 33 1.7

There was nothing wrong with the tailshaft balanceing before you did the work.
You have done something wrong with the installation,causing the problems.
Usually the job you have done will not cause any problems,but anything is possible.
It is possible now that the tailshaft will have to be balanced,due to human error.

I have driven the car many times and the tailshaft was in perfect balance.
Sometimes the tailshaft vibration can never be cured,,even after a balance.

Hopefully the vibration can be repaired,after dismantleing it again and looking for reasons why.

Robert

[alfa331.7]

I was thinking maybe it could be the middle donut where the 2 bolts go
I might need spaces to make it lever

Hmmmm might leave it to a pro

[Divano Veloce]

Hello,

if it didnt vibrate before you did the work i doubt your shaft is out of balance, it is more likely to be an alignment issue.

check the dimension A shown below. i use a 7mm drill bit as a feeler gauge. Adjust the height of the rear mount using washers.

Let us know how you get on and what fixes it

[Drogato Pista]

I see this is an older thread, but in case someone is having the same issue, I'll post a new comment.

When removing the propshaft/driveshaft on the 116 transaxle cars, it is imperative that you keep the clocking correct. In other words, the studs need to go back into the same holes the same way they came out. The fellows racing them mark them with a scratch on the corresponding ends to help reinstallation.

However, if you have already removed the shafts from each other without marking the alignment/clocking, you can take a guess. If it vibrates, uninstall them and rotate them to the next position. There are only three holes to choose from so there are only a few options to get it right. Once rectified, mark it for the next time.

Ciao,

Scott

[carlo rossi]

I was going to get mine donr the other day
he wanted wait for it $1200 to set the jigs up
I said my wife and  I prefer the vibration thanks but no thanks

[John A Pucak]

Theres a bloke in Turrella thats balanced my alfetta tail shaft for about $400

[Bob Morey]

Pieter at Motor Repairing & Tailshafts, 02 9567 6247 is the man at Turrella. He does a good job.

[carlo rossi]

I found one of my issues
the space between the motor housing rear and the nuts
the very critical 7mm space mine was 15mm

[bonno]

Hi Carlo
I take it that the vibration has now gone after the repositioning of bolts. 
cheers
bonno

[carlo rossi]

well yes and NO
when i start it for the forst 1o mins or so
it rattles a bit
and then it goes away !WHY?
but its much better

[bonno]

Carlo
Sounds like it could be either the spherical bearing located on rear coupling or centre bearing on their way out.  PM me if you require extract of workshop manual.
cheers
bonno