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  Topic Review (Newest First)
11-23-2017 08:42 AM
dlbehrns Here's the latest on getting the shaft. Given that the inside diameter of the top hat bushing is 18mm or .708" my olive measured in three different spots came to .692, .700 and .6935. Per Wes I the outside diameter of the olive should be .705-.707. I'd say that puppy is a bit worn. Now, the million dollar question is: what is an acceptable tolerance or what can I live with? I am going to have the driveshaft balanced to eliminate that part of the equation, then drive the car to see if any vibration is there or, can I live with it as it is. It took 90K miles to wear off .014" on the worst point on the olive so.....Interestingly enough, the groove in the bushing was only on one spot. It didn't wear the entire diameter of the bushing. I would be open to some feedback...TIA DB and Happy Thanks Giving
11-21-2017 08:56 AM
dlbehrns I'm an idiot never mind.
11-20-2017 12:30 PM
dlbehrns bump {;o)
11-19-2017 06:24 PM
dlbehrns I'm bringing up this thread again because I can't find the thread that talked about pulling the top hat bushing and building up the output shaft "olive."
I have found that there is shallow groove that has worn into one side of the top hat bushing. I have a new one and would appreciate advice of removing the old one or, a link to the thread I can't find that talks about the issue. I've Searched but can't find what I'm looking for.
There appears to be uneven wear on the olive and I will mic that to see just how uneven it is. Next question is, what should the olive measure?
One of our pals at Centerline talked about using a Loctite product to take up the "gap." Doesn't seem logical but I would be open to hearing about that if anyone has been down that road. I really don't want to pull the transmission, then the output shaft to have the olive built up and machined if what I have is within livable tolerances. TIA, DB
10-26-2017 11:00 PM
mygtveloce XXX
10-26-2017 07:29 PM
Tom Frasca Thanks I will order the part.. why not it will be fractional cost..thanks again.

Tom
10-26-2017 06:43 PM
mygtveloce XXX
10-26-2017 04:18 PM
Tom Frasca
Quote:
Originally Posted by sprintgtc View Post
No, I bought the car disassembled. The car was apart for several years and I believe the drive shaft was dropped at some point.
Mike I ment to respond ...bent DS never occurred to me so that will be the first thing we check before repairs, Thanks
10-05-2017 07:42 AM
sprintgtc
Quote:
Originally Posted by Tom Frasca View Post
Was your chassis hit how did the drive shaft "bend"... some darn heavy gauge metal ....???
No, I bought the car disassembled. The car was apart for several years and I believe the drive shaft was dropped at some point.
10-04-2017 07:24 PM
Tom Frasca
Quote:
Originally Posted by sprintgtc View Post
Tom, for what it is worth, I had a very similar issue with my '67 Super. I had the drive shaft balanced several times locally and still had the vibration. Finally took it to an old friend across the state that rebuilds drive shafts on commercial trucks. He called me shortly after I left and said "**** thing is bent, you can't balance a bent shaft" He then straightened it, balanced it, and it was perfect after that.
Good luck, Mike
Was your chassis hit how did the drive shaft "bend"... some darn heavy gauge metal ....???
10-04-2017 03:24 PM
dlbehrns
Quote:
Originally Posted by sprintgtc View Post
Tom, for what it is worth, I had a very similar issue with my '67 Super. I had the drive shaft balanced several times locally and still had the vibration. Finally took it to an old friend across the state that rebuilds drive shafts on commercial trucks. He called me shortly after I left and said "**** thing is bent, you can't balance a bent shaft" He then straightened it, balanced it, and it was perfect after that.
Good luck, Mike
Wish I could find someone around Nebraska to do that. Only two truck places in the state that do it and they don't have the proper hardware to match either end of the two piece shaft.
10-04-2017 07:54 AM
sprintgtc Tom, for what it is worth, I had a very similar issue with my '67 Super. I had the drive shaft balanced several times locally and still had the vibration. Finally took it to an old friend across the state that rebuilds drive shafts on commercial trucks. He called me shortly after I left and said "**** thing is bent, you can't balance a bent shaft" He then straightened it, balanced it, and it was perfect after that.
Good luck, Mike
10-04-2017 07:14 AM
Tom Frasca
Quote:
Originally Posted by PSk View Post
If you have a driveline vibration and replace any of the rear suspension bushes with poly instead of the originally specified rubber the vibration is transferred to the body shell and you feel it. Rubber is far superior at isolating vibrations.

Also the same happens if you replace the gearbox mount with poly or stiffer rubber.

So if you are unable to find the source of your driveline vibration and have installed poly (rear) suspension/mount bushes, replace them with rubber first to see if the vibration reduces/goes away.
Pete
Thanks Pete....The trailing arms are all rubber did replace thrust washers with poly the center drive shaft support is rubber...
10-04-2017 12:40 AM
PSk
Quote:
Originally Posted by Tom Frasca View Post
I am unfamiliar with a poly bushing ... the one part of the car that was left alone was the driveshaft, as the "doughnut" and carrier seemed to be in very good shape... I did grease all the u-joint fittings...
If you have a driveline vibration and replace any of the rear suspension bushes with poly instead of the originally specified rubber the vibration is transferred to the body shell and you feel it. Rubber is far superior at isolating vibrations.

Also the same happens if you replace the gearbox mount with poly or stiffer rubber.

So if you are unable to find the source of your driveline vibration and have installed poly (rear) suspension/mount bushes, replace them with rubber first to see if the vibration reduces/goes away.
Pete
10-03-2017 02:07 PM
Tom Frasca
Quote:
Originally Posted by PSk View Post
Was the harmonic vibration there before any poly bushes were installed?

If not I'd blame them.
Pete
I am unfamiliar with a poly bushing ... the one part of the car that was left alone was the driveshaft, as the "doughnut" and carrier seemed to be in very good shape... I did grease all the u-joint fittings...
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