can I chg. Trans.cooler assem. lines myself in my garage? are spec. tools req? on 1999 Chevrolet Blazer

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trans. fluid leaking on driveway and was told the Transmission cooler lines had to be replaced. need to know if it' something I can do, if special tools are requed, etc.
(1) Answer
Better leave this one to a pro!! Pretty tough repair with a lift and proper dont know your skill level, cant imagin trying to do it on the floor, back at the transmission....