Anti-wrap idea
 

When checking for parts for an antiwrap I had an idea when I saw some old CJ front driveshafts laying in the barn.

What if I cut the ends off of the driveshafts and used them as a top bar of my antiwrap. The slip should essentially eliminate the need for the shackle. Check out attachment for example. Is there anything that I am missing of why this would or wouldn’t work. Just seems like one of those ideas that seem great but would have a flaw I am overlooking.

The only things I could think of is being sure there is enough travel in the driveshaft and the wearing of the joint from the pressure of the axle trying to wrap

Rough diagram of idea
Attachment 795

Traditional style
Attachment 794

Let me know what you think!

Shackle idea = bad
Other proposed idea looks great!

Why is the shackle idea bad? Seems to be the most widely used.

I'm more curious about how you're typing. Do you pull off a shoe and do some toe tapping or just lay down on the ground.

OK, Ok why would the shackle idea be bad?

With the power you are running the shackle idea would be okay. The best way to stop wrap from weak springs is solid mount with a high torque motor.

Bear chow not sure where you are coming from there? :confused:

Thanks for the explaination.

In the picture I see the wrap bar the keyboard, mouse and a shoe I assumed you are wearing.

That pic was pulled from a website for and example. I haven't started fab on a bar yet.

You had us confused there!

You could try one on the front and the other style on the rear and compare. I would be curious to see the difference. Where is this vehicles next maiden voyage?

It won't be much of a voyage, but the next time I get it out will be at the Jeep Rally for Life in Troy, OH, on the obstacle course. After that hopefully last weekend in May or first weekend of June, but I have no idea where yet.

I've built a couple of the shackle type anti-wraps with great success , one for a Suburban with a built 468 and 38" TSL's. It went from the king of spring wrap to a good performer in a couple hours!

The one downfall of the shackle style is they can be noisy on a well muffled rig... this was for a offroad rig?

I'm also not sure how a bunch of side load on a slip spline would accelerate wear and get sloppy and very noisy , it's worth a try.


The one big negative is the fact that the slip style forces you to put your tube joint mid-way down your top bar which is a good spot to start an unwanted bend and eventual failure.

I'm running an anti-warp bar and it has worked flawlessly and saved my DS and u-joints . I ran with out one for one month on the street and my axle wrap killed the DS u-joints . The axle mounts are from Ruff stuff and the shackle is a stock YJ with a heim joint I made the rest.

http://i4.photobucket.com/albums/y15...e/HPNX0073.jpg
http://i4.photobucket.com/albums/y15...e/HPNX0072.jpg

Thanks for the responses.

Any other feedback on using a driveshaft as the top bar, with the slip of it replacing the shackle. Will the d-shaft have enough strength? Will the slip wear out quickly?

Thanks

i think the slip will fatigue and get sloppy quickly. I don't think most people realize just how much force is being exerted in the up and down direction from axle wrap. Think about the amount of force that it would take to wrap a spring... And it's just un-necessary... 1000's have been made with the shackle mount with perfect success.

I definitely realize the fatigue, broke two Yoke u-bolts and a cap on the u-joint after only about three tries on an obstacle. Probably go with the shackle design, but was going for points for originality:)

Carwash,

What size and type of tubing to you suggest for the track bar? Chance of getting to the swap meet looking any better?

Later

Traction Bars
 

Hows does that style of traction bar stop axle wrap? I would think that under the most severe cases of axle wrap, the pin going through the traction bar and shackle would just cause the shackle to rotate about the lower pin. I understand that shackle is in place to support articulation. In truck pulling we just hard mount (bolt or weld) the traction bar attaching point to the frame. Is that style of anti wrap bar just limiting the axle from rotating by limiting upward forces?

These bars when built correctly stop almost all the rotation of the housing, the eye of the traction bar swings in a large arch if not hooked to the shackle. You have to remember that if the bottom shackle mount is in a fixed position and the wrap bar eye travels in one radius in relation to the diff center-line then it sees almost no front-to-back load ... only torsional..


I have had good luck by having a bit more angle on my shackle than in Sarges pictures, lets you control wrap even when the suspension is twisted up... if the shackle is too short or angled toward the back it can actually fold over on it's self and bind ... holding your spring packs in a wrapped condition!

Why not just add a short leaf in the spring pack if it's axle rapping?:confused:

Big tires , SOA , high HP ..... A helper spring will not stop it from happening , you also will effect your ride height and flex. It's much easier to just add the anti-warp bar and forget about it .

On the original question . I also think the slip will wear out , my K-5 /cherokee ... what ever you want to call it would eat front DS slips on a regular basis , they would get very noisy and loose and I do not think they have any up/down force on them. My anti-warp bar lifts my whole jeep up when driving so I know there is tons of pressure on the top bar.

I understand that you want to do something diff. to make your Jeep stand out , but there come a time when K.I.S.S. has it's place.

Maybe you could do a triangulated anti-warp bar ---- this would be cool!

OK I'll step down off my soap box ....... I really need to go back to bed !!! Up way to late with a very up set Colrain Fire Fighter :(

if you want to do something different, search for the Bam Bar on JA.

I had to do a half leaf on my front springs to keep them from wrapping. It did work well.

Rough day for anyone who serves the public in any way. Appreciate all you all do...

My brother-in-law was there when this happened. Needless to say he was a little shook up.

It's got to be hard enough when it's a stranger, can't imagine when it's somebody you know and work with.