4T65E Shift Issues
I have a 2005 Pontiac Aztek with a 4T65E transmission. I was getting high rev'* and hard shifts, both up and down in all gears, and had the maximum adapt and long shift code 1811. I replaced the pressure control solonoid, the 1-2 and 3-4 shift solonoids, the vehicle speed sensor, the fluid filter, and the fluid. This all made a huge improvement in shifting, but I still have one nagging problem!
When the vehicle is started, I generally get a high rev on the first 1-2 shift. After that, the transmission shifts great. If anyone has an experience fixing the high rev on the initial 1-2 shift, I would really appreciate hearing the fix.