73 barracuda 340 727 driveshaft question.

[Flathead31coupe]

I was changing universal joints and noticed that the slip yoke was on the bigger end of the drive shaft instead of the tapered end like i am used to seeing.. Just so happen was watching graveyard cars and noticed a barracuda.With the drive shaft the same way, the slip yoke was on the bigger end and not the tapered.end. thoughts?

 

[pschlosser]

wait, are you saying the drive shaft varies in diameter across it's length? I always thought this was a uniform diameter on my 1970 shaft. The only clue to it's orientation I can recall, is a tiny counter-weight welded to the tube near the slip yoke at the transmission end.

 

[Vaanth]

I was changing universal joints and noticed that the slip yoke was on the bigger end of the drive shaft instead of the tapered end like i am used to seeing.. Just so happen was watching graveyard cars and noticed a barracuda.With the drive shaft the same way, the slip yoke was on the bigger end and not the tapered.end. thoughts?

If the drive shaft has one tapered down end, that end was installed to the rear by Chrysler, at the axle, as shown in the following image:

Some propeller shafts, or drive shafts, have one tapered end, some have two, and some have none. Other variations have inertial dampers on the front end or the separation point for the Internal Vibration Absorber (IVA) versions near the rear.

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[Flathead31coupe]

wait, are you saying the drive shaft varies in diameter across it's length? I always thought this was a uniform diameter on my 1970 shaft. The only clue to it's orientation I can recall, is a tiny counter-weight welded to the tube near the slip yoke at the transmission end.

That is correct.The taper end was facing the rear end...

 

[Flathead31coupe]

If the drive shaft has one tapered down end, that end was installed to the rear by Chrysler, at the axle, as shown in the following image:
View attachment 152071

Some propeller shafts, or drive shafts, have one tapered end, some have two, and some have none. Other variations have inertial dampers on the front end or the separation point for the Internal Vibration Absorber (IVA) versions near the rear.

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This is how mine looked , but I switched it around the other way with the taper towards the slip yoke at the transmission.. Should I put it back the other way?\nIs the reason behind doing it the other way

 

[pschlosser]

I see, now. thank you. yea, none of mine are tapered.

 

[Flathead31coupe]

II am wondering why they would put the taper.\nToward the rear end and should\nI put it back that way

 

[moparleo]

Follow the factory installation.

 

[Flathead31coupe]

Follow the factory installation.

I am going to put it back the way I found it

 

[Flathead31coupe]

So I put it back to where I found it.I would still like a good explanation to why they do that if anybody has one thanks