please help me

please someone help me,
my 05 soft top suzuki jinmy has started to violently shake when i hit 50mph.ive had new brakes put on,the wheel aliment done,tracking done and even now when i put my brakes on the car skids out like the brakes arent connecting.its in the garage at the moment but there having trouble trying to find the problem can any boby help me.they said there looking into the transmission now i have no idea about cars not like these problems jsut need advice thanks.

Sounds like ethier

Wheels arnt balenced properly

Or Kingpin Bearings need replaceing

The sounds as though it could be king pin bearings/track rod ends.
Kicks in about 45-47mph

Ask the garage to check for vertical play in the front wheels. Also if the bearings have been gone for any length of time you tend to have grease/oil running from the swivels as the excessive play has knackered the swivel seal.

However the 'like the brakes aren't connecting' sounds worrying.

hi thanks for info,

ive mentioned the king pin bearing to them but they look at me as if im stupid.i told them that the front wheel was leaking alot of grease and it looks like both sides are begin to split?

yes thats a sign the kingpin bearings have failed as many will tell you on here

Tell the garage to look at the kingpins before they go any further

If they keep telling you that isnt the problem with out even looking at it then tell them to put it back together and take it to a differnt garage

All the time they sit there stratching their head they are making money of you so its worth standing up to them