Gear box
 

I started to get a shake on the wheels of my Chrysler Voyager when I braked.
This got progressively worse in time. The gear box when it changed gears would rev very high between gear changes. when reversing the car felt like it wanted to stop start. Going along the freeway yesterday the whole gear box decided to pack up. No reverse and only 1 gear forward (3rd). When going forward there is a grating sound coming from the box. the oil smells burnt. the gear box was recently overhauled. Km 108000. error codes 1684 , 1595 , 0700.
what could the reason be for this failure.