Exchange of planets in birth chart and in current transit, any significant changes can be happened?

Can planets exchange in birth chart and in transit give sudden results? 

Libra lagna- Jupiter in 4 th house. 

                       Saturn- ketu in 6 th house. 

House exchange in birth chart.

In current transit Saturn is in 4th house. Jupiter in 6 th house.

Any significant changes can be happened during this transit?

Thanks in advance