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SierraBronco

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haven’t fully followed sierrabronco’s complete build. What do you mean by lowered?

Yeah I think the RJ rear torsion bar is only 0.85” diameter. Stiffness is a function of diameter to 4th power. Even a bump to 1” dia makes a big difference.
I’m not sure what the lowered comment refers to either.

I would like to lower it with some taller shock towers but have yet to do so.
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SierraBronco

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Oh I have this issue as well. I just haven’t complained about it. The upper links are too short to get the pinion angle correct without a ton of thread showing…
To stay within SAE specs I believe you can have 1 1/8” of thread coming out of the jam nut. RK recommends 1” just to stay safe. There’s still a lot of bolt in that arm but I’m glad we have the longer ones.
 

SierraBronco

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@SierraBronco I was just kidding. That’s what makes this forum entertaining.

might not have been welded on precisely to spec. I could see that causing an issue. Curious what specs Rk provided?
They have an alignment method on the truss that ties right in to the top of the diff. Kinda hard to screw it up, unless you didn’t bother to verify and just three it on there. Which could be the case with ours. Guy seemed a little disinterested in hearing a simpleton tell him how to do his job.
 

ScLeCo

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They have an alignment method on the truss that ties right in to the top of the diff. Kinda hard to screw it up, unless you didn’t bother to verify and just three it on there. Which could be the case with ours. Guy seemed a little disinterested in hearing a simpleton tell him how to do his job.
Been there. 🤦‍♂️
 

87-Z28

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I keep watching that @SierraBronco video. Amazing. That rear axle is totally free to move. I can’t imagine there is any binding anywhere. I also am starting to think the coilover pivot at the frame mount is a big player. In that set up the coilovers themselves must truly be the only limiter for travel and articulation.

Hope it lasts and remains durable. Must be a blast to ride.
 

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I keep watching that @SierraBronco video. Amazing. That rear axle is totally free to move. I can’t imagine there is any binding anywhere. I also am starting to think the coilover pivot at the frame mount is a big player. In that set up the coilovers themselves must truly be the only limiter for travel and articulation.

Hope it lasts and remains durable. Must be a blast to ride.
It’s certainly flexy. You can feel that lateral movement when driving over small rocks and whatnot on the trail.
 

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I’m not sure what the lowered comment refers to either.

I would like to lower it with some taller shock towers but have yet to do so.
I think he is referring to the modification you made to the RJ bracket to accommodate for the winch mount.
 

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haven’t fully followed sierrabronco’s complete build. What do you mean by lowered?

Yeah I think the RJ rear torsion bar is only 0.85” diameter. Stiffness is a function of diameter to 4th power. Even a bump to 1” dia makes a big difference.
He moved his sway bar mount down to make room for his winch mount so he got a lot of movement in the mounts cause just one bolt was supporting the mount….
 

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He moved his sway bar mount down to make room for his winch mount so he got a lot of movement in the mounts cause just one bolt was supporting the mount….
Iiiiiiiiiiii gotcha. Still the same amount of bolts supporting the swaybar, now it just wiggles forward and backward a tad. Dropped it maybe 3/8 of an inch. Despite that I don’t know how much of a difference it would make on the lateral movement of this setup. The joints might suggest it’s designed to accommodate some sideways movement during articulation.
 

7sKnuckledragger

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So if you, like me have a lifted 2dr, and actually wheel it, chances are good the boot on your rear driveshaft/front joint (the one at the rear of the xfer case) is torn/shredded etc. Moreover, no Ford dealer I talked to would warranty this...they all claim that Ford will bounce the claim if the truck is lifted (lift me baby). Anyhow...regardless of my responsibilty to pay for this, what is more important to me is a long term solution! Tom Woods has announced they are not going to make driveshafts for 6g (that sucks, but o well). I tried the terraflex cv style joint, and it was no better. Enter Adams Driveshaft near Las Vegas! Another member here tipped me off that they were building them, and turns out alot of the guys in the local Jeep club have used their shafts as well, and they have a good reputation.
20240425_112143.jpg


The "holy grail" of flanges!:
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They also send you a pinion yoke, the ever popular 12mm 12pt ford driveshaft bolts, and U-bolts for the 1350 style pinion yoke...word to the wise tho...check the pinion yoke closely! I got the wrong one at 1st. Same spline, but not deep enough to preload the pinion bearing. Here's the wrong one, next to the original. It's easy to see the difference, but if you don't compare the two, the wrong one will bolt on, but the pinion will be loose, and make nasty noise!

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Anyhow, they were quick to remedy that situation, and sent me the right one overnight...thanks guys! The guy you wana talk to is John Dickinson...he seems to be the guy that knows 6g Bronco stuff there, and a helpful dude! He's gonna want 2 length measurements w/the vehicle at curb height...flange lip to flange lip, and seal to seal, and that's basically all he needs!
20240425_145734.jpg


I didn't ask whether the u joints were greasable, and turns out they are not. Solid cross type are much stronger, but where I live greasable is better...these will likely need to be changed in a couple years...not an issue for you folks in the golden west tho I suppose! Feels like a very solid shaft...on par w/race ones I have had built over the years...and should permanently solve my articulation problem! Balance was spot on...smooth up to 75mph accel and decel...so I am 100% happy!
Been running adams on my TJ (Jeep) for years. It’s taken more abuse than, well it’s been abused and it just keeps working. No outta balance or vibrations after 7 years. Solid upgrade
 

Mdsuits

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Iiiiiiiiiiii gotcha. Still the same amount of bolts supporting the swaybar, now it just wiggles forward and backward a tad. Dropped it maybe 3/8 of an inch. Despite that I don’t know how much of a difference it would make on the lateral movement of this setup. The joints might suggest it’s designed to accommodate some sideways movement during articulation.
Same amount of bolts but I think being against the frame it won’t get the extra movement back and forth.
 

SierraBronco

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Same amount of bolts but I think being against the frame it won’t get the extra movement back and forth.
The problem came from the frame not being strong enough to withstand torquing down 3/4” bolts to spec, pinching it in slightly. This prevented the ovals from keying in as much as they normally would. It’s in the same mounting location and everything as designed by rockjock.
 
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Bmadda

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OK its looking like the standard t-case output shaft is different than the advanced t-case. I've moved my discussion of it to a different thread so I don't hijack @Bmadda's thread any further.
Totally NOT a hijack Dusty...this is good info for anybody looking to go this route! I don't have anything w/ESOF xfer case to compare, but knowing Ford this DOES NOT suprise me at all...always gotta be something different! Hope you guys can find the "holy grail" flange for that one too!
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