TC45 service question

[Happy in NC]

I know this is an old thread but I thought I would try.
My question is. Is there a separate drain and fill operation for the rear diff? Or does it get changed with hyd. complete change?
Thanks in advance

 

[dieselscout80]

The transmission, rear axle and hydraulic system are all one sump and use the same hydraulic fluid.

The front axle if 4wd and power steering system are both separate systems.

 

[Happy in NC]

Thank you!! I thought so but wanted confirmation