The A670 automatic transmissions is from a front wheel drive 3 speed automatic vehicle. Common symptoms are early soft, late hard shifts or no shifts at all.
Dodge A413, A470, A670, 31TH Transmission Rebuild. If your vehicle feels like it wants to keep going when you come to a stop, and your engine dies when hot, check your lock-up solenoid on the valve body in the transmission pan. The majority of the time it sticks when the transmission becomes hot.