95 toyota tacoma sr5

I just bought the truck a week ago. It has 250k on body and 80k miles on rebuilt motor. I believe it has a 6" suspension lift with a 3" body lift. The guy I bought the truck from said that they replaced the carrier bearing a month prior. When I test drove the truck it felt fine and drive strait. 500 miles later it shakes you out of the truck. I replaced the upper ball joints and now the carrier bearing. I could tell it was replaced recently. That solved alot of problems but not all. I still get a vibration from 60 to 75 . also a very noticeable howl that starts around 60 mph. I had the tires rotated and balanced. Still the same. I raised the rear of the truck off the ground and got the speed up to 75 mph and the vibration is pretty bad. I have video of the drive line at 75mph and don't notice any movement or vibration.
I have checked transmission fluid its burnt but full going change soon. Checked rear diff , needs changed but still has diff fluid. I did notice I have a axel seal leaking on passenger side. Also the power steering pump whines and leaks a but i keep it full. The rack bushings also need replaced. Any input or solutions would be greatly appreciated!! Im starting to think my 4k investment may have been a mistake,

 

Welcome to TW, which means 'Takin' Wages'. Stupid saying, I just thought of it. My 'Pearly' cost $12.5K, just got $2.4K in tires, leafs, shocks, brakes and alignment, and now I need transmission work costing $2K-4K. As for your vibration, that video you took will help people help you, please post it up. Have you checked for driveshaft balance?

 

I will get the video posted, I have not had the drive shaft checked yet but will diff do that. I love the truck and don't expect a cadillac ride. But with so many miles I want to fix all the little things and get the preventive maintenance yo to date. Another issue is the cruise control won't work, clutch switches are both good, all fuses are good. The airbag light on, thinking maybe when they did the body lift they may have broken the clock spring