Help, transmission issues
2005 Honda Civic with a 4 speed BMXA transmission with 221K miles on it. I owned it since it was almost new and it always had clean fluid. It shifts fine going from 1-2-3 but going from 3-4 it intermittently feels like it was put into neutral for a split second, and then goes into gear. That seems to happen more when the engine is cold. Besides that, it is shifting fine. No trouble codes for the transmission. The fluid is clean and full. Also, what is a normal highway cruising RPM? It runs between 2500-3000 RPM on the highway depending on speed, which seems a bit high but I am not sure. I think I remember it being about 2000 RPM but I am not completely sure. Thanks guys, have a great day.