First, when I'm at 20-30mph and I let off the gas I'm getting a rumbling from underneath. Hard to tell where, but seems to be more towards the back end. Thought maybe u-joints were settling into the new post-lift angle or they needed replaced. Didn't find any play in the joints but noticed this play in the back t-case side:
My second issue is the rig shakes violently when braking now. After extending the brake lines I bled them - and have since done it again to double check everything. I've also adjusted all 4 drums to make sure they're good. When they're up on jacks everything seems to be the same as they were prior to the lift. I don't think this is related to my first issue and I have to be missing something with my brakes - right?
Added a few more pics for reference - as I'm sure you can tell I'm new to jeeps and trying to learn. Not sure, but I believe the shackle angle isn't great but shouldn't be causing this. I read I needed to drive it and they would settle in better?? Hard to do with my current brakes.
Ignore the fluids on the floor. I think that's normal?