I found what I thought was a sweet Craigslist find on a swing out tire carrier. Unfortunately there are no markings or brand stamps anywhere and I am having a tough time with the install. It came off if a scrambler and the guys included all the bolts and frame tie in brackets but the issue is the bottom tabs. It looks like I will need to remove the entire rear shackle hanger to mount this up. Thought? Should I just grind it off to use only 1 rear shackle hanger bolt? Or just take it all apart?
Those tabs were meant to go between the shackles and frame. The stock rear crossmember on our old Jeeps isn't strong enough to hold that bumper with a spare on it. I tore the crap out of the rear crossmember with a much smaller bumper and trailer hitch before finding a better mount. Mine didn't even hold a spare tire and the crossmember was overwhelmed. Those tabs provide a direct frame contact. There are other ways to mount to the frame but no matter what, I recommend you tie that big bumper somehow firmly to a frame mount. And definitely don't hang a spare on it until you do or you might find the whole assembly ripping right off.
I made my own bumper, but it mounts the same way. I actually turned my shackle hanger ound so its holes were farther forward and then the holes were free to mount up the bumper. It is very simple to unbolt the shackle hanger and mount the bumper with its tab given tabs. You probaly could use new bolts on the hanger anyways. However if you dont feel confident enough to undo 4 bolts you can cut off the horizontal tab and just use the frame brackets. It should be strong enough with good bolts and washers. You may find you need to space it off the jeep just a bit, my hitch required about 3/4", if so just get 8 longer grade 8 bolts and use some large nuts between the crossmember and bumper to space it out a bit.
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It kind of looks like a LOD Swing out tire carrier. On their bumper, it only has 1 hole and the instructions say to just take off the outside bolt for the shackle hanger. I was leaning towards grinding off the 2nd hole on the one I have and following these instructions. The bumper did come with frame-tie-in brackets, so the full weight would not be on the cross member. I am comfortable taking the hanger off, just not wanting to do all of that, but if you guys think I will gain a lot more structural integrity, I can turn my hour or two install into a few hours.
You'll want to brace and reinforce the rear cross member piece with either 3/16" plate or even better 1/4" bent at 90 degree corners. Bolt it to the inside or weld it. Will make it very strong back there.