So I have a 1998 v8 Land Cruiser manual, my transfer case shifter knob is shaking a lot, (nkt the normal shaking) like if I hold it my whole arm starts to shake, I ignored it for a while and my driveshaft completely snapped off, I changed my transmission mount and the engine mounts and the u joints in the rear driveshaft I even had my clutch replaced and the shaking doesn’t seem to go away, please if anyone knows what’s going on I’d appreciate the advice.