When I get up to speeds over 50 my steering wheel shakes, feels like front end bouncing, when Im at 45 or lower it doesnt do it, what is the problem?

Make sure your tires are balanced and check for defects in them. Also make sure that the front steering parts are not worn, IE tie rod ends and ball joints. Might need to look at adding a steering stabilizer if nothing else is found to be bad.

This is usually either wheel balance if you just feel the vibration in the steering wheel, or shock absorbers are worn if you can actually feel the front of the vehicle bouncing.

It sounds like a ball joint is worn, possibly the rack end ball joint or tie rod end.
With the bumpy ride it could also be that the front shock absorber has failed.
Jack the front wheel up on each side in turn, grab the wheel at each side and shake it back and forth as hard as you can. If you hear or feel looseness, the problem is in the steering, as above.
Then shake the wheel while holding it at top and bottom. If you feel looseness then, the problem is in the front suspension wishbones.
Repeat this on the other front wheel. Let it down on the ground, then bounce each front corner up and down as hard as you can (you might have to have a second person with you doing this). If you hear a clunk or feel excessive bounciness, it is the shock absorber. When bouncing like this, the car should resist, and not keep bouncing when you let go.

Very little info for a fix. Tie rod and upper ball joints do not make a front end shake. Lower ball joints wear out before the uppers do.
Front end shakes at what speed, if you have a broken belt in one of your front tires you will notice it more at low speeds. Mud or snow stuck in wheel will make them vibrate at speed. Lug nuts tight since front end work? You need to give more info. Switch front tires with back tires. If shake is in steering wheel it more than likely is front end but if you feel it in your seat it is more than likely in the rear of the car.

the front wheels may need balancing or it could be a loose or worn tie rod end or other loose component on the front end, you will need get under the vehicle & have a good look & give the steering components & anything else a good shake to see if you can see anything loose or worn.........hope this helps......cheers.

These are typical speeds for wheel balancing problems to make themselves obvious. Have you had the wheel balancing checked?

The alinement is out. Check balljoint's and track-rod end's.Check these part's replace faulty part's and get it alined after.Cheer's

You need to have the front end inspected for damaged steering components. Check your Tie Rod ends, A frame bushings and ball joints to make sure there isn't excessive wear or lose connections. If all of that is in good working order Drive down the road with a friend in the next lane over and have them look to see if either wheel in bouncing. If either wheel is bouncing you need to replace the struts. they are replaced in pairs, both sides. The front end will need to be aligned after you do this.

Check wheel balance,
check steering linkages for loosness - such as tie rod ends, steering rack linkages etc,
check driveline for worn/loose joints and bearings.

ball joint
control arm
shocks
brake rotor
and all your suspension parts have them check by your mechanic