like changing engine oil, we should not have to be afraid of changing tranny fluid. dropping both pains, letting it drip for several days, pushing out fluid radiator intercooler with compressed air, install new filter and fill. Fluid is fluid, get walmart dextron fluid, cheap and clean. if u want to preserve your tranny, do it often and install a real intercooler and bypass the radiator intercooler altogether. NO reason changing fluid will damage a tranny but it may expose a problem. gonna ask my tranny guy why this is