Drive shaft diameter...what's too big?

[aengineguy]

Getting close on my 71 Dart. Built 408 (525+hp), 904, 8 3/4 with 1350 yoke, full TTI 3" exhaust to the bumper and the stock trans x-member. Planning on 1350 slip yoke also. Are there any fitment problems with going as big as a 3 1/2" dia. drive shaft. Have not decided on mild steel, 4130 or aluminum yet. Future plans may include 600+ hp. Just want to be on the safe side. Will be a street car for a while, till I tub and cage it later.

Appreciate your comments.......Thanks!

 

[dartcuda1]

Anything over 3" . Mark

 

[Demon416]

Check with this guy. He'll build what you need.

http://www.dennysdriveshaft.com/repair_service.html

 

[dartcuda1]

Nice you got the web address I was looking for it.Denny says that he builds 3" drive shafts with 1350 yokes that will handle 1000 horsepower.If you have a local drive train shop in your area they can do the same thing

Check with this guy. He'll build what you need.

http://www.dennysdriveshaft.com/repair_service.html

 

[aengineguy]

Thanks guys! The original stock shaft diameter was 3" od, but was swedged down at the ends, to 2 1/2". I just did not want to get a 3" full length, that would be a fit problem in the trans x-member, especially with the larger swing of the 1350's. I thought at one time I had read that there was some issues with clearances??

 

[pettybludart]

I bought a chrome-moly driveshaft from Mancini,s with 1350 u-joints and the 904 slip yoke.It fits in my 66 Dart Early-A with Dana 60 no problems.I also have an adjustable D.S loop.Good luck.

 

[Supershafts]

The diameter of the shaft is dependent on the length, rpm, hp, weight, and trans...

then see your local driveline shop

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