aluminum driveshaft

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chevy art
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aluminum driveshaft

Post by chevy art » Sat Apr 11, 2015 9:52 am

just bought a HD aluminum driveshaft with 1350 universals. guy at shop who builds driveshafts for all the racers says his supplier of driveshaft parts says that aluminum driveshafts should only be used on OEM stock type applications and should never be used with race cars or street cars with high horsepower.never heard of this and he could not give me any concrerte proof that the aluminum shafts are no good for high HP applications . anybody care to comment on this thanks art

Dan Timberlake
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Re: aluminum driveshaft

Post by Dan Timberlake » Sat Apr 11, 2015 10:35 am

Sounds like the supplier had one too many comebacks.

What diameter is the drive shaft?

Could you post pix of your drive shaft showing the yokes? If they are dimensioned and proportioned like the steel ones then I'd be concerned they are not stiff enough to support the needle bearings very well. Look how aluminum conrods are typically proportioned compared to steel conrods.

This page claims if the yoke is labeled CAM it should be avoided.
http://www.driveshaftspecialist.com/Alu ... 0cars.html

Welding aluminum is generically far trickier than welding steel. High humidity or the slightest contamination can result in cracking even with some alloys that are considered very weldable.
Sometimes the cracking is delayed.
Aluminum motorcycle rims from the 70s and 80s often spontaneously crack at the welded seam after a decade or 3.

chevy art
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Re: aluminum driveshaft

Post by chevy art » Sat Apr 11, 2015 10:14 pm

thanks dan. my tube is 3 1/2 diameter. i will go and check out the parts of shaft that are machined to hold the u-joints and see if these areas are beefier.(i think that is what you were talking about.) i will also try and see exactly what brandthe u joints are. i still have to buy the tranny yoke, and i want to get a good forged one for my turbo 350 tranny. do you know who i can buy a good one from at a reasonable cost.?anything else i should look for on this aluminum driveshaft. only reason i bought the shaft was because it was a very good price and in brand new condition(i hope). maybe i can get a pic posted(with a friends help) art

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Re: aluminum driveshaft

Post by Supershafts » Mon Apr 13, 2015 9:27 pm

Uh oh so the Off-shore race boats i have running AL shafts for some 15 years plus are going to fail ?
Man im gonna lose sleep tonight....................................

Imagine that, from DD to race cars in the 2600hp area and diesels making more tq than pro modifieds hp.... I have them all


Find out who his supplier is, seriously.

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