My Accord has over 177,000 miles and it never had any major problems and i want to keep it that way my major concern is my trans how can I keep it in good condition? it is a AT

 

I would suggest changing the Trans fluid and using Honda OEM fluid. I have read on here many times Honda’s don’t do well with a flush and list another procedure rather than just draining and refilling the trans as you still have a lot of fluid in the convertor. On my 1995 I did a flush at a 100,000 and it is near 190,000 now. I drained the trans refilled to full took the trans line off at the radiator into a drain container then started it up and added fluid close to even with volume of fluid coming out. I would not recommend this as you can do damage even idling with low fluid. Do a search for trans flush and you should see the other procedure.