My 904 valvebody

Yes I know. I had a turbo action reverse manual in my challenger. I'm fine with shifting.

Is there any chance I can change the reverse servo while the trans is in the car?
To disassemble the rear servo the tailshaft will have to be removed and the pin that holds the rear band linkage pulled out so it'll let the servo apply lever drop out of the way. Getting it back together is sometimes a real PITA