ORD Shakle Flip Seasickness

[NV_K5]

I installed the ORD Gen I Shackle flip on my 72, went pretty well and gained enough to remove the blocks. However:Now I have body roll/sway in the rear feels like it's going to pass me and with the top on since it's supposed to be winter, it's even worse.

Last pic is how you get an 8" lifted K5 w/38 into a yuppy garage.

Does anyone else have this problem?

 

[rdn2blazer]

that just means you have super flexy rock crawling suspension now, cool!

dig the last pic too.

 

[NV_K5]

that just means you have super flexy rock crawling suspension now, cool!

That's the hope, but since the head gasket took a crap, I haven't had much wheeling time. The one small trip I took my friend behind me was expecting me to roll over becuase from behind it looked like the axle leaving.

 

[CUCV2]

Is that the 4" or 2.5" flip?

 

[NV_K5]

It's their Gen I kit - 4"
"GU28010 Fits ‘67-’72 GM 4" lift only" Per ORD site.

 

[CDA 455]

Wow!

This is a new one for me .

 

[CUCV2]

No disrespect but is it mounted right? If so, is the frame in good shape? Maybe you could box it around that area and see if that helps.

 

[Blue85]

Do you have any pictures of the completed shackle + mount?

Are the bolts tight? Did you disconnect the axle U-bolts during the installation? Maybe those are loose.

 

[rcamacho]

Depending on the angle between the front and rear of the spring, a flip can induce "rear steer" geometry. It's a known trade off with flip kits. If you are also running lift spings than that will further magnify the phenomenon as the arch of the springs will cause the axle to steer as well.

I ran a 5" BDS flip kit on a '95 Dodge and the rear steer phenomenon was "interesting" on the street compared with flat springs and the stock block.

 

[bp71k5]

I'm running the same setup and haven't noticed anything like that. Sounds like somethings loose, like your U-Bolts.

 

[NV_K5]

Depending on the angle between the front and rear of the spring, a flip can induce "rear steer" geometry. It's a known trade off with flip kits. If you are also running lift spings than that will further magnify the phenomenon as the arch of the springs will cause the axle to steer as well.

I ran a 5" BDS flip kit on a '95 Dodge and the rear steer phenomenon was "interesting" on the street compared with flat springs and the stock block.

I will get some photo's tonight. The geometry along with an 8 inch lift (four inch spring over stock height) would make sense.

How was your "interesting" Dodge off road? better for crawling or still Interesting?

P.S. The bolt were the fist thing I checked, all RE-Torqued to 65 Ft Lbs.

 

[miniwally]

I will get some photo's tonight. The geometry along with an 8 inch lift (four inch spring over stock height) would make sense.

How was your "interesting" Dodge off road? better for crawling or still Interesting?

P.S. The bolt were the fist thing I checked, all RE-Torqued to 65 Ft Lbs.

What bolts to 65ft-lbs

The shackle bolts should be a bit looser than that

The u-Bolts should be WAY tighter than that 105 ft-lbs to start with

 

[Pookster]

check the bushings. If their really worn they can cause similiar issues, and also if any of your rear leaves are cracked would also be problematic.

But yes, you could have the wacky rear steer, funny thing, if you switched to new or rearched springs, your problem is worse then if you had old saggy springs.

Its the whole arch=shorter than straight issue.

 

[rcamacho]

I will get some photo's tonight. The geometry along with an 8 inch lift (four inch spring over stock height) would make sense.

How was your "interesting" Dodge off road? better for crawling or still Interesting?

P.S. The bolt were the fist thing I checked, all RE-Torqued to 65 Ft Lbs.

It was great offroad with less spring wrap. Rear steer on the street was pretty bad. It improved a bit with polygraphite bushings. But it was enough for me personally not to choose a flip kit in the future.

 

[dcubb]

I eliminated the "axle steer" (at least to the point it's not noticable to me, and I'm sorta picky) by fabbing new spring hangers and my own shackle flip brackets to lessen the spring angle.

On my k5, I moved the spring eye down 3" and back 1". The shackle bracket is basically the same as ORD's 2.5" flip. BTW, 2" T/C ez rides in the rear.

Stiff shocks and/or a swaybar will help alot by controlling body roll to an extent.

 

[dcubb]

Pics of my setup.

 

[mrk5]

What kind of shocks are you running? Sounds like they aren't working.

I don't really understand this "rear steer" thing.

I've run both 4" and 2.5" flips with 6" shackles and haven't had the issue you describe. But then I have have a great shock setup. I also have factory 56" springs.

 

[mrk5]

Is that flange after the muffler for removing the tailpipe on the more difficult trails?

 

[NV_K5]

Ok, thanks to all for the input! dcubb those are great spring mounts and custom shackle flips.

The first thing that comes to mind is the ORD GenI shackle flip is deficient. It re-uses the backing brace of the spring bolt (see Pictures) If I had it to do again ie spending money, I’d get DIY4X’s shackle flip.

Now on to the spring hanger – I will buy DIY’s 5” shackle which comes with new bushings and hope for the best.

My springs are SkyJacker/Superlift Softride springs and with the ride height being just what I want, I think I’ll get and add a leaf kit to stiffen the ride a bit.

The pictures are with the top (dual wall – heavy) installed. When the top isn’t on the hangers are straight down.

 

[BGKYK5]

I don't really understand this "rear steer" thing.

Rear steer is caused by the axle moving forward and backward with flex. As you turn right for example, weight is transfered from the right to the left side of the truck. More weight on the left causes the spring to flatten and move the axle backward toward the shackle while less weight on the right causes the spring to arch and move the axle forward away from the shackle. The net effect is the axle is no longer perpendicular to the frame and instead is trying to help the truck turn even tighter = oversteer.

What is really fun, is that when you try to correct, you shift the weight the other way, and the truck goes into oversteer in the other direction. Next thing you know you are sawing the wheel back and forth like a madman trying to go straight while the rear end is all over the place trying to pass you on both sides.