Transmission on 1993 Mazda Protege

The hold light in dash was blinking. When starts blinking the transmission slips. We rebuild the transmission. When we ran the car again, the light stills blinking and still sliping. What other part should we check? Computer?

Asked by for the 1993 Mazda Protege
A blinking light normally indicates a fault stored in the transmission control module, have you checked for fault codes?