Diff U bolt torque spec

. 45 seems like A LOT!! I feel like its gonna start distorting the tube
If you are using the flattened OEM style you will be ok.

Most people crank them down to 100 or more and that's where the tube crushing comes from, that and using round u bolts that put a huge point load on the tube

I have photos of one of my housings that was crushed you could see the perfectly round indentation on the outside and bumps on the inside