driveshaft
#16

Denny's is 1 beside those listed. While there may be others, a good group is what we both list below. See my reply below for other places too.
There aren't many options with a shaft that long. I am finally fixing to bite the bullet and have a carbon fiber one built. It's expensive, but keeps it a 1 piece shaft and supposedly good for 1500 HP and 150 mph even at that length. Most of the extended cabs had 2 piece shafts in them and lots of places build the shafts like that.
And yes, critical speed changes when goin to a higher gear in back too. I gather u probably found that out or knew it if lookin at a high end purpose built d/s.
I talked to The Driveshaft Shop, Inland Empire Driveline, Performance Shaft Technologies and Advanced Composite Products and Technology. I'll probably have ACPT build it, some of the others wanted me to switch to bigger ujoints before they would build it. Told me it would take like a 3 3/4" carbon fiber shaft to make it live and anywhere from $12-1500.

That's the ballpark cost as I found out awhile back when I asked. Also, Dynotech & DTS. Not sure if DTS makes a C/F vers., but I know Dynotch does. I **** when I heard cost, but they don't save alot of weight when u add in the alum. yokes that get fitted & mated up w/. the carbon shaft. If they were $750-850, I mighta sprung for C/F. A few reasons I didn't, in no order:
1) cost
2) if I go to an 80E, then I have a spare $1000+ 60E style C/F shaft that can't be modded to work on 60E, cause u can't cut the carbon I was told.
3) if C/F grenades, it turns into expensive little carbon dust! that's a biggie too!
4) weight diff. not as dramatic as what some would lead u to believe.
If I had an 80E, the different tranny argument needs shaft shortening, is out the window.
#17
#18

Just a wild guess. It's probably not a motor holding u back, as these LS's are stout. Tranny perhaps (6xE)?
If you've been thru 3 stk. shafts, isn't that costin u time & $ just to replace stockers? Not tryin to be a dick, just wonderin. But if like me, 2 things usu. hold up my ideas, $ is usu. 1st, then time.
#19
Capable of more & stuck at lower than u think (& what others say) sounds familiar. Hope you're not dealing w/. newfound traction issues too.

Just a wild guess. It's probably not a motor holding u back, as these LS's are stout. Tranny perhaps (6xE)?
If you've been thru 3 stk. shafts, isn't that costin u time & $ just to replace stockers? Not tryin to be a dick, just wonderin. But if like me, 2 things usu. hold up my ideas, $ is usu. 1st, then time.

Just a wild guess. It's probably not a motor holding u back, as these LS's are stout. Tranny perhaps (6xE)?
If you've been thru 3 stk. shafts, isn't that costin u time & $ just to replace stockers? Not tryin to be a dick, just wonderin. But if like me, 2 things usu. hold up my ideas, $ is usu. 1st, then time.
it's more money than time.
#20
so after emailing a bunch of companies no one makes a one piece driveshaft that long for ext NNBS. So what do yall suggest? is it that hard to run a 2 piece and weld a carrier bearing in place?






