np241c driveline..???

[rob h]

On my 2500hd years ago i removed the pump rubbed nv263 for a 90's np241. Its still a slip yoke style until now, i ordered a jb conversion sye kit with a 1350 flat flange. So with having a 1350 yoke on the 14 bolt i'll do a 1350 cv at the t-case. The problem is going to be the rear shaft length, from what i have checked it looks like it will be 75-76 inches. Calling around alot of companies won't do a tube over 65, I'd rather not add a carrier bearing and go 2 piece. It looks like tom woods and carolina driveline will make the shaft i need. Any of you guys ever run a one piece shaft that long..?

or is it better just to stay with the slip yoke style and a shorter shaft..?

 

[sweetk30]

the reason being is the LOOOOOOONG tube at highway speeds acts like a rubber band and starts bouncing and give drive line vibration.

I had one once that was 5-6" longer than max and it had a vibe at highway speeds . later on a changed up the driveline combo and had to shorten it and it was gone.

I also watched then balance my shaft that vibed and it was dead on . . . its just the bouncey flexy factor of the long tube.

did you call and chat with jesse @ high angle driveline ? he is the king of tall truck shafts and smooth highway ride.

 

[rob h]

Yea, i called him and he said 65 is tops for a single shaft. I've also read he's good but i'd rather not do a 2 piece and have to deal with adding a carrier bearing plus going thru all of that. A few places will tho make the larger shaft, it will be larger diameter tho. Either 3.5 or 4 inch tube is what they will do. Tom woods said they can build me one with a 30 day guarantee, if i don't like it i have 30 days to return it. Hopefully that route will work, this could get expensive fast. I did see that some diesel crew-cab shortbed trucks have shafts at 80 inches.

If my crossmember had the tabs for a carrier bearing i would try it, i really don't know enough about how its supposed to be to go thru it

 

[sweetk30]

if aluminum shaft that's why longer .

steel is the shorter max length .

 

[rob h]

That part i'm not sure of, i couldn't find if it was aluminum or not. My stock shaft tho is only 2 inches shorter than my current slip yoke shaft, my stock one was 67, mine now is 69. The sye idea gets me give or take 5 inches more.

 

[obijuank5]

5 inch aluminum on my cclb 6 speed 4x4 dodge. Damn near had to hang it out of the bed when I took it home. No vibes from this one.

 

[rob h]

Who builds those..?

 

[obijuank5]

I had it done locally at driveshaft specialist in San Antonio

 

[rob h]

You hit the nail on the head with that one....I called around, either most won't make em that long in steel or they say stay slip yoke and just go with an aluminum shaft....

 

[rob h]

Thanks for the help guys, i really appreciate it. The only way i'm going to do a slip yoke eliminator is to run a two piece shaft. I really don't want to do it. So i cancelled the jb conversions order. I looked thru reviews and called driveshaft specialist and bought a 5 inch aluminum shaft with a slip yoke and 1410 joints. Not my favorite idea to do but i saved a few bucks so hopefully the aluminum shaft was worth it. They say they can do them up to 80 inches without vibes, mine from the tail shaft to the center of the u-joint is 72 so the tube will be in the high 60s so that's not too bad. Around here they were almost 200.00 more than them so i figured i'll just pay shipping and still save money.

 

[obijuank5]

Nice. I deal with those guys once a week. They have yet to offer a bad product and the guy Craig wheels a Chevrolet.

 

[rob h]

Nice. I deal with those guys once a week. They have yet to offer a bad product and the guy Craig wheels a Chevrolet.

When i called and explained what i wanted craig right away said about staying slip yoke and the 5 inch heavy wall tube would be best. A few dmax trucks send big power thru those. Sled pullers and some tow pretty heavy things use em. Super nice guy, i talked to him for a bit. Also when i measured it craig was out to lunch, brett took my order he knew exactly the same. Pretty nice bunch of guys, 5 days for them to build it and ups ground so i'd imagine at least 2 weeks. That's not too bad, They said other places sell aluminum shafts too but most use neapco shaft kits which aren't as heavy made or as of the same quality. Also made sure to say we use alcoa tube, sonnax weld yokes and spicer joints so its quality stuff. Shipping ups isn't too cheap but like i said tho, with shipping its still cheaper than me buying one here.

 

[rob h]

Nice. I deal with those guys once a week. They have yet to offer a bad product and the guy Craig wheels a Chevrolet.

The shaft came in yesterday, super nice quality. Packed in a cardboard tube with a cardboard box over top wrapped in bubble wrap. Thanks for the heads up on this place, I'll get it on later today.