Hi
I have a 2012 HONDA ACCORD 4 Cylinder engine with about 65K miles. Everytime the car seems to vibrate while accelerating from about 30 to 35 miles per hour....I took to the dealer and also to firestone mechanic shop....the shop said CV axle boot is torn. Had that repaired...did not fix the issue....found on internet that it could be CV-axle is worn out or shafts need replacement.....had both axles changed by a shop [or the shop said they changed it but I am not sure as I gave cash and he did not give any receipt....yes my bad]...then took it to Honda Dealership..they checked and said transmission torque converter has gone bad it will take 3-4K for fixing it! So I am still driving with this annoying vibration....It seems to go away when the vehicle is driving at about 45 to 60 miles/per hour...Had similar issue with 1999 Acura TL. Do you think flushing the trans fluid will help?
How old are your tyres?
I doubt if change the transmission fluid will help but I have seen them do that when the torque converters go out. And it is a really expensive repair but on the other end I've seen them run that way for years and still go down the road