I'm not real sure what you're trying to get off,maybe somebody else does,but the brakes and pinion shafts are ahead of the axles. I had to one behind the pump off a few years ago to fix the blown actuator piston without taking anything else off. If the seal you're wanting to change is behind that brake housing,you should be able to get to that the same way I did to get that piston out.
I don't know,we'll see what somebody else thinks. The 2-135s,you have to pull the axle housings to get to the brakes,but not the 2-105s.