Cuda Driveshaft - Dented! Oh No!

[dodj]

If you decide to go new,  I got my replacement shaft from Dr Diff. Just need to tell him what ujoints you use.  It's a Spicer drive shaft.
It has been a couple years now,  but i think i paid 300 or 350 bucks.

[RUNCHARGER]

I would change it if you're going to drive it. You will need a new yoke on one end as the replacement tubes are not tapered. I would look for a good used one if you can.

[73_Cuda_4_Me]

Any difference between a 71 and a 73 auto?? I have a stock 73 with 7260 u-joints and new 727 trans yoke and u-joints installed last year. 

I am doing an A-41 overdrive with new driveshaft...

[Yellow71Cuda]

Any difference between a 71 and a 73 auto?? I have a stock 73 with 7260 u-joints and new 727 trans yoke and u-joints installed last year. 

I am doing an A-41 overdrive with new driveshaft...

Great question.  Anyone know?

[6bblgt]

the 2883636 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1970 to 1972
(43-19/32" lg. x 3-1/4" dia. w/7290) *

the 2883769 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1970
(43-27/32" lg. x 3-1/4" dia. w/7290) *

the 2996134 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1971 to 1974
(43-25/32" lg. x 3-1/4" dia. w/7260)

* I think one of these driveshafts has 7290 u-joint on one end & 7260 u-joint on the other 

the 904 driveshafts are longer (~4-1/8")
the 7-1/4' driveshafts are longer (~2") the 904 & 7-1/4" combination (~6-1/8" longer)
the DANA 60 driveshafts are shorter (~1-1/4")

[73_Cuda_4_Me]

Parts manual for mine calls out the 2996 134, 43.79" length, with 7260's...

Thank you, @6bblgt for all your wealth of knowledge that you share with everyone here!!!

   

[Yellow71Cuda]

the 2883636 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1970 to 1972
(43-19/32" lg. x 3-1/4" dia. w/7290) *

the 2883769 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1970
(43-27/32" lg. x 3-1/4" dia. w/7290) *

the 2996134 driveshaft was used for PP833 & 727 with 8-3/4" Barracudas from 1971 to 1974
(43-25/32" lg. x 3-1/4" dia. w/7260)

* I think one of these driveshafts has 7290 u-joint on one end & 7260 u-joint on the other 

the 904 driveshafts are longer (~4-1/8")
the 7-1/4' driveshafts are longer (~2") the 904 & 7-1/4" combination (~6-1/8" longer)
the DANA 60 driveshafts are shorter (~1-1/4")

Thank you! 

[73_Cuda_4_Me]

The 70-71 spec from parts manual was listed in another thread not long ago... depending on engine, it might be same part number, from what I see.

https://forum.e-bodies.org/engine-transmission-and-rear-end/4/driveshaft-length/9638/

[Yellow71Cuda]

I'm not against having a new one built, but does anyone know why the factory driveshaft tapered down in diameter at one end (rear)?  The shop said the new one would not be like that...it would all be one diameter.   

[halftrackman]

I think the reason for the taperd  drive shaft is the  pinion  snubber is just above the drive shaft,  this would leave a little extra space for the shaft.   I would replace the shaft, but first try driven at different speeds, up to 80_ 90  if no vibration  shaft will be ok 

[Yellow71Cuda]

I think the reason for the taperd  drive shaft is the  pinion  snubber is just above the drive shaft,  this would leave a little extra space for the shaft.   I would replace the shaft, but first try driven at different speeds, up to 80_ 90  if no vibration  shaft will be ok 

Thank you!  I think I'm going to try that. 

Thanks to all for all the great feedback and wisdom.  This truly is a great place for Mopar community and knowledge!   

[Crash520]

The smaller end diameter is to give extra clearance to the floor when/if you have three people or weight in the back. I had a new shaft made and it has struck the floor even with the pinion snubber fitted because it did not have that smaller rear section, it was full diameter all the way, yes my car is stock ride height to very slightly lower, before I swapped out shafts I never had the problem.

[Yellow71Cuda]

The smaller end diameter is to give extra clearance to the floor when/if you have three people or weight in the back. I had a new shaft made and it has struck the floor even with the pinion snubber fitted because it did not have that smaller rear section, it was full diameter all the way, yes my car is stock ride height to very slightly lower, before I swapped out shafts I never had the problem.

Wow, that is really good to know...Thank you.  I'll be looking for a good original piece if mine causes a vibration.   

[dodj]

The new d-shaft I got is the smaller diameter the entire length. 

[Yellow71Cuda]

The new d-shaft I got is the smaller diameter the entire length. 

Ah, that makes sense.  Thank you!