回複：有必要換變速箱油嗎

I changed trany oil last year. last year when I change engine oil, I drained trany fluid by mistake. I went dealer and bougt 4L trany fluid. I drilled hole and installed a nipple to connect a clear hose. at the other end of hose, I put a fitting with check valve+nipple. then plip over trany oil jag (hanging a high stand) and drilled small breathing hole on top of jag. it took whole night to refill trany fluid,next morning,closed valve and took down hole first then screw out fitting and some time, blocked drain hole with a finger, at last screw in the plug as soon as possible. it took me couple days to find solution.
because dealer charge $500 to replace trany oil and tow fee too. trany fluid is not cheap either about $200. hopely the info can help you, if really want to DIY