[Accelo]

Of all the tasks rebuilding the Arm Shafts will be the most difficult to do.
One needs a 1-5/8" socket or something that opens up that large.
I have seen pipe wrenches and 16" crescent wrench work but it's not pretty!
Best off to brake the large nuts loose while they are still on the truck.
Most people don't have a vise and table heavy enough to get them apart.
Don't forget to mark the alignment shim location.
Best of luck on your project.
Rick