Hello - We are preparing to mount the rear differential of our 2015 IRS set up and the bolts are confusing us compared to what is shown in the instructions, in the book, in EdwardB's photos, etc.

The silver bolts that would go through the bushing and then into the rearmost part of the differential are 100 mm and appear they would end in the differential without the need for a nut. Those seem right.

But the frontmost gold bolts are 130 mm and seem to come with lock nuts. But they seem tight going into the differential and then I worry that the unthreaded part of the bolt might not even fit through the differential since it seems a little wider? Why would they bother to thread the frontmost part of the differential if they just want the bolt to thread into the nut after the bushing?

I didn't want to force anything and double check with the brain trust before I started.

Thanks,

Differential.jpg