one piece rear DL.

Fordtrucks · Mar 25, 2013

Looks like I need one about 70" for my CC SB. I figured an aluminum one would be ideal but that's not going to happen with any of my local shops. Where are you guys getting yours built at? Are you going steel or alum? Ever since we did the 6" lift I've been chasing a vibration so I'm through and believe this will fix the problem and be stronger in the long run.

lazlow · Mar 26, 2013

http://www.axle-exchange.com/home

local shop by me. They did some driveshaft work for a rock crawler i had. Work was very fast and good quality. Give them a call and see what they say i know they do a lot of aluminum shafts

LovinPSDs · Mar 26, 2013

Carbon fiber!

Didn't smokin joe or someone here have one?

blk350on20s · Mar 26, 2013

Steel. Had mine made at Weller truck parts. Its been in my 05 and now to my 08. Pop your drive shaft out and measure center of yoke to center of yoke. That'll be enough for them since you're not a long travel suspension. IIRC mine was 71" or so.

Fordtrucks · Mar 26, 2013

You guys think steel is a better choice? I thought everyone was doing aluminum?

zeigler86 · Mar 26, 2013

interesting!.....

Fordtrucks · Mar 27, 2013

I gues it was a dumb thread anyways...

Demon · Mar 27, 2013

I just recently put a one piece 5" steel tube 1480 joint rear shaft.

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Smokin_Joe · Mar 27, 2013

My 1pc came from the factory:clapping:

WydOpen · Mar 28, 2013

I'm contemplating one from these guys...

Driveshaft Specialist Inc. for Ford Trucks

Heard good things about these guys, too...
Arizona Driveshaft

Erikclaw · Mar 28, 2013

Go steel one piece. It will take care of your vibrations and probably cheaper. I had a couple of high dollar ones made by a shop claiming they made them for trophy trucks etc. They were worthless pieces of crap. The rear destroyed itself as I pulled into Denver, somehow the front survived DPC. They are now out and a local place in Denver made me a one piece and a front one for a fraction of the price and with the biggest u joints that would fit.

Fordtrucks · Mar 28, 2013

My shop told me he can make a 4" steel one but he said the maximum speed would be about 3200 rpm before it would begin to vibrate. Not sure if it would need to spin that fast or not. 3.73 gears and 36.5" tall tires...

Tree Trimmer · Mar 29, 2013

no, your thinking wrong, you need to do the math before the shaft, not after.

take the engine rpm, divided by the final drive out of the transmission, should give you drive shaft rpm's.

allowing 2500 engine rpm's

1. gear 3.11 ratio 803 shaft rpm's
2. 2.20 1136 shaft rpm's
3. 1.54 1623 shaft rpm's
4. 1.00 2500 shaft rpm's
5. 0.71 3521 shaft rpm's

taking 5th gear to 3k engine makes it 4225 shaft rpm's

so go floor your truck, see where you end up on 5 gear, and that will tell you what your shaft will turn.

or, if you wind out 4 gear depending on your shifting strategy, your engine rpm's will tell you shaft speed.

should help you determine your own driveshaft speed.

Fordtrucks · Mar 29, 2013

Doesn't look like a 4" steel shaft with a maximum speed of 3200 rpm is going to be the best idea then. Now what? Thanks for the help guys.

Demon · Mar 29, 2013

Whats the problem with that scenario?

At 70mph I'm at 2k rpm engine speed. There's a problem If your making 2500 or 3k rpm at highway speed. Either you need to regear, or bring it back under 100mph cruising speed.

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LovinPSDs · Mar 29, 2013

What about a race or holding ANY gear out over 2500 rpm?

Erikclaw · Mar 29, 2013

Mine has gone 130mph before and no vibration and multiple nitrous runs. I didn't do the calculations but it also has held 2200-2400 rpm for hours at a time and no problems. It seems to me you guys are over thinking the whole drive line thing.

LovinPSDs · Mar 29, 2013

I agree, shouldn't be difficult but the guy specifically said it'll vibrate above 3200 rpm. You spend me time there then you think

Erikclaw · Mar 29, 2013

Maybe the guy isn't right, there are a lot of guys here with that type of drive line here and no vibration problems.

Tree Trimmer · Mar 29, 2013

no, the guy is saying that he wont guarantee his to not vibrate at any shaft speed over 3200. he's not saying it wont, hes saying he wont back it.

eric, your guy uses different material or a different process, or different tools, therefore he will back his to a higher rpm.

just means if the op doesn't like where he falls in the whole shaft speed thing, he just looks for a different place to make one.