1996 Jeep Cherokee Shakes violently after hitting bumps in

When I first bought this jeep about 8 months back, the front driveline had just broken, and if you went over 20 mph the entire car shook like crazy. It was fixed and everything worked fine after that. About a month back I hit a bump while 4x4ing pretty hard, and it hit either my front transfercase, or transmission housing. Ever since whenever I hit an uneven bump while driving such as traintracks my car shakes violently until I slow down to about 15mph. I also think my transmission is leaking transmission fluid a little. I have also heard that bushings could have something to do with it.