I recently bought an 06 GXP, when I test drove the car and drove the car home everything seemed fine. Drove it to work the past two days and have noticed when stopping it feels like the trans is fighting the brakes because its not downshifting at the proper time. The car will only do this below 25mph when it should be downshifting into 1st gear and once under 10mph it will go into first, otherwise the transmission shifts great.

The traction control light and service stability control message are currently on in the car, I will scan the abs system and see if there's any codes in there and will try to see if I can get the tap shift sytem to downshift properly. Has anyone else run into issues like this? I know it will likely end up being internal damage to the trans and end up being a rebuild or replacement but has anyone diagnosed an electrical issue such as a wheel or trans speed sensor to produce a similar issue?