does a saxo vtr rear axle fit a peugeot 106 quicksilver
Depends on how big a hammer you own.
This is a US-based board, and no matter how helpful the members of this board may be, the reality of the situation is that your brand of vehicle has not been sold in the US for a couple of decades. As a result, I doubt that many people in the US would have direct knowledge of Peugeot mechanicals of recent vintage. If you try posting your question on a European-based board, you will be much more likely to get an answer of value.
VDC has a good point there.
I might add you do a web search for a forum with your brand of car.