Looking to have a new shaft built for my 4WD to 2WD conversion. The shop I spoke with yesterday was not keen on building a 59" (between yoke centers) steel shaft and wants to do a 4" 1350 aluminum shaft. Looking at Denny's site they don't recommend aluminum for anything over 56" or anything hooking serious power to the ground. I plan to run slicks. I want a shaft that will handle up to 1400 FWHP/TQ and 7000 RPM in a 6000lb truck. What are my options?

 

Maybe you can get U-joints welded onto one of these:

 

Try texas driveshaft speciliast...I had a 5" al shaft that was 68 center to center I think. Are you using 1410 joints?

 

i agree with atomic. driveshaft specialists with thier 5" alum .120 wall. i was told no problem at 72" and 6200 rpm. at 59" you should be good to 7k and they have these things behind modded diesels so it should handle power wise. hit them up, of all the places i talked to they were friendliest to deal with also

 

yea, and they make it pretty much as soon as you call. ive bought 2 from there and they ship out the next day

 

Lol....

 

I'll give them a shout. Current shaft is 3.5" steel and utilizes 1350 joints. The builder seemed to be wondering how it survived, but the truck has not seen traction yet just running street tires.

 

I run a 3" nitrous ready with 1350 joints from Denny's, and they will handle about any power an LSX can put to it.

 

Just checked their site again- actually, that is the one that they say max length is 56". The 4" aluminum shows 62" . My shaft may need to be more like 63" if they are referring to the distance from the trans to the diff yoke. The 59" was according to the other builders site and doesn't include any portion of the slip yoke beyond the u-joint.

This is what they say re aluminum:

"The heavyweight race cars and trucks can be very abusive on a hard launch so using aluminum may not be the best choice. Please note we DO NOT offer our "twist it or break it" replacement with any aluminum driveshafts. We only offer this with our steel driveshafts."

 

another thumbs up for Driveshaft Specialist here!!!