Changed the trans fluid on my 150k mile c5 and now it started slipping
I just got this automatic corvette with a 4l60e a month ago and decided to do basic maintenance on the car so I changed the trans fluid, put a new gasket and filter in. The fluid had been changed before as it had an aftermarket filter on it. I filled the car up to the correct level and now driving it, it slips in 3 gear whether it’s trying to down shift or up shift into 3rd gear at high rpm. Anything I can do to save this transmission or is it over?