Any experiences with the Undercover Fabworks skid plate?

jjvw said:
I'd like to see the rest of the Jeep before putting too much focus on one particular failure
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I get enough info from this without seeing the rest, the body kept moving forward while the frame didnt. It’s the old Newton’s law numero uno
“a body lift in motion tends to stay in motion“ 😉

edit: if we were only in a bar right now, what fun it wouldn’t be.
 
DrDmoney said:
I get enough info from this without seeing the rest, the body kept moving forward while the frame didnt. It’s the old Newton’s law numero uno
“a body lift in motion tends to stay in motion“ 😉
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I guess this is an argument for the hidden body lift. ;)

Though I have a hunch that this is the result of an incident that no one wants to be a part of even if the body wasn't lifted.
 
DrDmoney said:
I believe the fastener is closer to failure than you think, this fastener should fail as a shear connection not by a bending moment in this area.
View attachment 123196
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I would think that the nutserts or rivet nuts either ripped out or deformed the sheet metal around them. The issue is that the body lift turned what is mostly a shear issue into a shear+bending issue.

I'll bet those fasteners were still intact. Grade 5 fasteners yield at 150 ksi. The surrounding sheet metal probably yields at 50 ksi, and although it has more surface area, is significantly thinner than the surrounding metal. The sheet metal on the body simply wasn't designed for combined shear and moment loads of that magnitude.

The only bolt-on solution that could be in a body lift I could think of would be to make the pucks T-shaped or a long block instead of cylindrical. That way the puck applies the moment on a much larger area of sheet metal, thus reducing the local stress caused by the excess moment.

Weld-on solutions are much easier and more widely available.

That said, this vehicle was probably totaled regardless of the body mounts. This is such a rare issue that most people will never encounter it.
 
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Agreed, but you can’t argue that it somehow made it onto a lift, which means it was likely still a roller. It’s clear which end is the front. It’s stated front end collision. I’m curious if this is the worst part of the damage or why else would you throw it on a rack and focus on the comparably minor damage?

CF9AEAFD-213A-4BEA-8918-B6AF04273C37.jpeg

How about those UCF Skid Plates
 
Steel City 06 said:
That's the same Jeep...
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It’s amazing how much further the mass went after it separated. I sometimes wonder about cage tie ins vs the capsule theory. Drag boat accidents used to end tragically most times, now they hardly ever end fatally with the safety capsule.
 
So, will a UCF Low Pro mount be necessary with a 1.25" BL, 1"MML and 2.5" suspension lift on an '06 6-speed and the UCF Ultra High TC skid?
 
Jeep 541X said:
So, will a UCF Low Pro mount be necessary with a 1.25" BL, 1"MML and 2.5" suspension lift on an '06 6-speed and the UCF Ultra High TC skid?
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From UCF website:

We recommend that you have at least 1" of body lift PLUS a UCF LOPRO mount to install this skid plate with no body/transfer case vibration issues. It can also be installed with ONLY a 1" body lift if you clearance the tub in area where the transfer case would normally touch.
 
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Jeep 541X said:
So, will a UCF Low Pro mount be necessary with a 1.25" BL, 1"MML and 2.5" suspension lift on an '06 6-speed and the UCF Ultra High TC skid?
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I did the "Extra High" version and with my BDO MML and 1" BL, the t-case is close. I think if you want to run the Ultra-High version, you'll need the LoPro mount or will need to massage some sheet metal...

Also, be ready to modify your exhaust hanger by the cat some - here's how I did mine: https://wranglertjforum.com/threads/pc1ps-2006-jeep-lj-build-brünhilde.48964/post-886133
 
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Jeep 541X said:
So, will a UCF Low Pro mount be necessary with a 1.25" BL, 1"MML and 2.5" suspension lift on an '06 6-speed and the UCF Ultra High TC skid?
Click to expand...
I have a 1-inch body/motor mount lift, 2.5/3 inch suspension, and UCF extra clearance skid. No Tub clearance issues and no LoPro mount or exhaust mount mod needed at the transfer case. I did need to raise the two rear exhaust hangers to make up the difference. As said before every Jeep is different.
09CFC66A-F8AC-4909-8DAC-DC6965381F1A.jpeg
 
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