Front prop shaft suggestions, dragracing lifted Truck

[Swisstyphoon]

I was running the Cognito double cardan front propeller shaft since I installed their 4" lift. It worked fine, even at occasional drag racing until just recently.
I heard from a few forum members that their same shafts snapped, so I deceited to make a driveshaft safety loop, finished last Friday, and went to the drag races on Sunday. First run was great, but when I was making boost @ the staging light for my second run: boom!! the damn thing snapped.
Luckily I had my safety loop installed just in time!
Now im trying to find a better shaft, what are yall running?
I found already a promising shaft online, this company is aware of the weak link on the double cardan shafts and made it stronger.

http://www.ccidriveline.com/chevrolet/99-06-external-slip-cv-front-driveshaft.html

Anyone running this shaft, or heard about them?
Any other suggestions?

Here some pics of the carnage:

 

[leehype]

The link you posted is dead. I have no experience with that company, only thing I can share is I have bought all my drive shafts from Tom Woods

http://www.4xshaft.com/

I feel their prices are fare and the quality is second to none.

 

[Sledheadxp800r]

At least your shaft made it long enough to get a little rust on it. Mine lasted me a week and a half and probably 350 miles :roflmao: I could have spent that money on beer

 

[Sledheadxp800r]

Same thing

 

[Swisstyphoon]

The link you posted is dead. I have no experience with that company, only thing I can share is I have bought all my drive shafts from Tom Woods

http://www.4xshaft.com/

I feel their prices are fare and the quality is second to none.

Fixed the link, thanks

 

[Swisstyphoon]

Same thing
View attachment 24794

Thanks to your post in the other thread I was warned about this shaft. :thumb:

 

[jonathancasey19]

Are these stock shafts you guys are breaking with a Cognito 4-6" lift?

 

[Swisstyphoon]

No not the stock shafts, the Cognito shafts are braking!
I changed to the cci shaft and it looks really promising! Its beefier than the cognito shaft. I can tell more when the snow is gone and I can test it on the track.

 

[Too Many Projects]

I have that CCI front shaft. In fact they designed & built that first one on my truck & it's the icon on their website. Now they build them to order.I couldn't find anything stronger than stock available for a lifted truck so I had them build one as big as they could fit.
I have about a year & a half of use on it with plenty of boosted launches with 40's & about 5 sand dune trips with no issues so far. Not saying its indestructable but that's my experience so far. I can say that they're good people to work with & stand behind their products.

 

[Swisstyphoon]

I have that CCI front shaft. In fact they designed & built that first one on my truck & it's the icon on their website. Now they build them to order.I couldn't find anything stronger than stock available for a lifted truck so I had them build one as big as they could fit.
I have about a year & a half of use on it with plenty of boosted launches with 40's & about 5 sand dune trips with no issues so far. Not saying its indestructable but that's my experience so far. I can say that they're good people to work with & stand behind their products.

Cool, I agree with you they are very nice people to the deal with, and the shaft looks really good. Just didnt get a chance to try it out since I got it.

 

[Too Many Projects]

Ha, ha I must have totally missed your last post, didn't realize you already got it. I'm sure you'll be pleased with it.

 

[Dallas S]

I also broke the same shaft. now run the stock shaft with a 6" pro comp bracket lift. no issues.

 

[Chevy1925]

i really wish the lift company would just rotate the diff pinion angle down, it would fix the whole issue without the need for a different drive shaft

 

[1SIKDZL]

i really wish the lift company would just rotate the diff pinion angle down, it would fix the whole issue without the need for a different drive shaft

X2^ ...seems like most lift companies don't take this into consideration. I am surprised the cognito 4-6" kit doesn't have the front diff angled, because my cognito 9-11" lift has the diff angle rotated so there is hardly any angle on the front shaft. Running 37s on mine for past 2 years with plently of 4x4 use and no probs.

 

[Chevy1925]

X2^ ...seems like most lift companies don't take this into consideration. I am surprised the cognito 4-6" kit doesn't have the front diff angled, because my cognito 9-11" lift has the diff angle rotated so there is hardly any angle on the front shaft. Running 37s on mine for past 2 years with plently of 4x4 use and no probs.

no the pinion being rotated up to match the driveshaft angle is the problem. on a regualer u-joint driveshaft (one u-joint at each end) you want the output of the t-case and the input of the diff (pinion) to be at the same angle. not doing this is what cause the vibs we get and why a CV shaft fixes it. CV shafts require the pinion to be perfectly inline with the angle of the driveshaft.

why some say they get the vib and some dont, i dont know (could be varience in the lift, trans/motor mounts, other things) but the reason it does vib is cause lift companys just cant grasp that concept or its cheaper to do it this way. Im not sure as im not their accountant nor engineer