Thanks a bunch. I guess I need to see which cap diameter I have tho. Then I'll look I to getting some. But, in the meantime I'll go ahead and check my drag links and front end components to make sure there's no loose components. I just replaced my front trackbar. I get some wobble on bumps but not quite to the death part. (I had death wobble before which is why I changed my track bar, the boot was tore and had a lot of play).
Your vibrations are very likely from too steep of a rear drive shaft angle caused by the suspension lift. That causes the u-joints to start vibrating. A tcase drop or mml is what you need. Don't drive it long with those vibes which will start taking out things like u-joints or bearings. I would at least immediately drop the tcase skidplate a half-inch or so with spacers to stop the vibes.
Any things I can use as spacers on that tcase drop? I have a TSC right near me... I'll get under the jeep today and check my joints, and if it is them, I'll replace and see if I still have the vibs. If I don't I'm good but if I do I can prob drop that tcase plate immediately to follow.
Yes, for sure there are nearly always vibrations with a 2.5" lift where the SWB TJ is concerned. Vibes can start with only a 2" lift.
You can stack washers around each of the six tcase skid plate bolts but you'll also need longer bolts if your TJ is new enough to use the smaller shorter metric bolts. They need to rated at least 10.9 if metric or Grade 5 if the older bigger SAE bolts.
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