My Car is a Dodge Rally 4 Dart, 1.4L engine. I bouuggt the car and after a week, check engine light was coming on. It stopped on the road annd ant the dash board it says service transmission and when I took it to the mechanic, we found out the rally pack was over heating. We changed that and it was still overheating. So the mechanic says the transmission is good but the hydraulic pump that connects the gear and the rally pack is bad and needs to be worked on. What do I do and if you think this is not the problem please indicate