Recently we had a customer upgrade the front axle in there Wrangler JK to the Teraflex Tera 30, in his stock axle he had axle tube seals fitted which he wanted transfer over to the new axle. As you can see from the first photo the inside diameter of the Tera 30 is a lot larger.
So we machined up some aluminium adapters, these were fitted with stainless steel grub screws, these were slid into the axle tube with sealant and clamped in place with the grub screws.
The axle tube seals were then tapped into place.
Here at FTE 4x4 Specialists we like building special parts to overcome problems. If you need a problem over coming then contacts to see if we can help. firstname.lastname@example.org