Must of went over pretty soft. Didn't even break a window. That's how you live and learn, when you get to walk away and try another day,
I would check all of the fluid levels in everything. trans, t-case, rears, oil, water. battery. Clutch master and brake master. As well.
The front and rear diff should have vent tubes on them and routed up high into the body. Front is usually hooked up by the top of the radiator on the driver's side, and the rear is mounted up in the rear wheel well next to the gas filler hose.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...