I pulled the drive shaft out of a 69 Dart 4-speed the I recently bought and found a lot of wear on the slip yoke. I'm assuming that the tail shaft seal caused the wear.
I took the shaft to a shop to get the yoke and U-Joints replaced and have the shaft balanced. They told me that the wear was probably caused by a worn out tail shaft bushing.
Does anyone have any opinions on this? Is there anyway to tell if I have a tranny tail shaft bushing problems without taking it apart? I can not drive the car as it is, due to the motor being no good.

This was caused by a bad tailshaft bushing.....it's trash essentially

Agree with the bushing/bearing.
You could have the yoke machined down on a lathe and have a steel shell pressed on it again to bring it back to its stock diameter.

Sure, anything's repairable with enough time and money
But by the time you pay the machinist and buy the Speedi-Sleeve it would be cheaper to get another yoke...

SORRY but that is not SEAL wear.
The yoke is obviously hammered, Now the question is ?? How far does one go to REPAIR the issue ?

If that Yoke has been in the trans a while, there is apparently a problem.
Driveshaft severely out of balance ??? Rear bushing is probably TOAST, and there is probably a lot of foreign material in the trans.
At this point you can BAND AID a mortal wound or do what needs to be done

The car that the shaft came out of was my friends who pass away last year. I bought it from his estate. It has only 10K miles on the odometer as the car has been parked for the last 40 years. It was raced for I think one season then parked in 1974. Right now I'm trying to put it back on the road with a minimum amount of money invested in it. I have know idea what kind of shape the tranny is inside.

if you are only getting it going for minimal investment now, and plan to revisit the issue in the future, just pick up a junk yard yoke and slam it in there. it is positively not seal wear, and you will have to investigate at the minimum, drive shaft and out put shaft runout as well as total yoke engagement. an out put shaft bushing is definitely needed as well, but just to get it going for the short term, a yoke is all i would do. or, just put it in as is if it's really going to be short, short term. the damage is done now, but it will go a few miles more as is. just don't think it's gonna last very long. only you can make the decision to tear into it and fix it correctly now, or post pone it a bit because of your time constraints. just remember this. if you just replace the yoke[for ? $$$] and do nothing else, you stand a very good possibility of replacing the yoke again if there are major issues with the drive shaft/out put shaft as described above.