I got a 1985 Cutlass Supreme about a year ago and I have 55k miles on it. I changed the transmission filter and flush my transmission myself about a year ago. It runs pretty good but needs the carb rebuilt and a couple other stupid things (antenna motor went out, RPM gauge is useless etc.) Any way, I have no way of telling how high my RPM's are when I shift. When I'm in second gear, my transmission seems to take a awhile (but not slip) to shift into 3rd. The RPM gauge is buried from 60-75 miles an hour when at WOT. Any other time the car shifts fine but I'm worried that my transmission is holding out the gear too long. My TV cable was a bit loose, but I just tightened it up today. Could this be an internal problem? I'd rather not blow this junk transmission because I'd like to keep my car original. Please let me know if you guys can help. 🙂