Vibration and wobble after replacing chain
The axle is a single piece and it has 2 functions. The first is to secure the bike to the frame but it is also the stationary part of the hub that transfers the forces on the frame to the wheel through the wheel bearings. 

Since the axle is a single piece, Tightening the frame to axle bolts could be tightening the hub to bearing torque. The wheel will feel gritty when you rotate it.