Drive shaft with a rubber isolator in it?

[Speedbird]

Well, I've never seen one. New to me.
This came in a 318 67 Charger.
But the car had been converted from 3 speed on the tree to 4 speed, 69 dated 383 and a 489 rear by a PO.
So I'm not sure if the shaft is original to the car.
Regardless, I've never seen one.
Were they common? I'm going to shorten another one, maybe from a Diplomat.
This thing looks weak.
By the way. The search doesn't seem to be working.

 

[Speedbird]

Well, either they were so common that I have asked a stupid question.
Or no one has ever seen one.
Search is working now though.

 

[rakort]

I've seen them, but have no specific knowledge where they were used. Probably a vibration dampening thing

 

[khryslerkid]

???

 

[Meep-Meep]

Never seen one on a MoPar but plenty of Fords used them in the 60's. By now the rubber is junk so don't even bother using it. What happens is the rubber takes a set and the driveshaft acts like it's bent (vibration). A drive line shop can cut the weld yokes off and put them on a new tube, balance. etc...

 

[chignikred]

These insulated drive shafts were common and mainly came on the 6 cyl, or small blk applications. The idea , was the insulator damped the shift shock to the rear end, and made for a more quite ride. It is not performance, and I would ditch the shaft for a solid tube shaft.