I am a manager at a Lube Shop.. If someone wants a T flush after 75k they MUST sign a waiver!!
The reason is.. After so long the varnish that builds up from clutch plates and broken down additives from the original T fluid .. Actually becomes part of the trans.. Flushing it out doesnt cause the "no go" issues.. It uncovers them..
My "opinion" is DONT DO IT.. But it is just an opinion..
By the way.. No matter how much you flush.. The color will never come back fully..
Good thing that the dye is only a small % of the additves that are needed in the trans.. I say.. Every 30 to 50k.. FLUSH!! But with 115k.. Just do pan drops..