Shaking in turns - need help!

[4x4man]

SOLVED!!
I probably got air in the power steering system after the 300m driving without the serpentine belt.
Did the steering back and forth (cap off) to release air, and now everything is ok

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Today I replaced my broken drive belt tensioner, and make sure the drive belt was not damage.
Double checked drive belt over the pulleys - ok.

My problem now when driving is the whole car is shaking when I make turns!!
Sometimes I can make turns and it's ok, but most of the times it "shakes".
Tested in max 45 mph, and afraid to go any faster before I know what's causing this.
This problem was not before I replaced the tensioner!

The power steering pump got fluid and seems to work great when car stands still.

I hope someone out there may know what causing this and will let me know?
I'm NOT a mechanic, but learning all the time from good help on this great board

UPDATE: Forgot to mention I moved the car about 300 meters (cold engine) without the drive belt. (if it's meens any)

Thanks in advance and please eccuse my english - I'm from Norway .