Automatic transmission when my prelude is cold,my transmission in first speed hesitating to change or slip,what the problem,please,thanks.

Check 1st 2nd shift solenoid (lift it of the box check passage way is clear ) use genuine fluid i cant strees this enough (9 years working on hondas taught me ) it works so many problems solved with a simple oil change

I've got the same problem. When engine is cold gear shifting is hard and uncomfortable. But when engine temperature is rising the gear shifting is soft. Where can I find these solenoid valves responsable for gear shifting? My AT gearbox has code M6HA. Please help!

Having rebuilt alot of Honda and Acura transmissions,i have noticed on test drives that these cars generally do shift later,especially the first shift,from 1st to 2nd,before we ever lay hands on them for repairs.Honda has designed this into the vehicle with the computer programming.With that said,if the trans is really really shifting late,there could be a problem somewhere,and i would advise to have the vehicle scanned for diagnostic trouble codes,as there could be a problem with the electronic solenoids mounted on the exterior of the trans,on the case.There are shift solenoids,line pressure solenoids called linear solenoids,TCC solenoids,some models use clutch pressure switches,and all use speed sensors.So there are alot of exterior electrical components that can affect transmission operation,and this would show up when scanning for diagnostic trouble codes.That's the starting point.The fluid can also be changed and use only Honda genuine fluid or equivalent.The filter for the transmission is only changed when the trans is completely torn down for an overhaul.So,trans in the car,remove the drain plug,drain,and refill.Good luck.