Radiator problems of the 2005 Dodge Durango

My Durango was serviced on 2/23/2018 with regular upkeep stuff like new battery, oil change, ect. About a week later, my rpms would jump and drop while on the highway. On 3/10/2018, I started my car and drove a few blocks and it did just fine, later that evening, I drove about 4 blocks and my engine died. No check engine light, I was able to start right back up and make it about a block before it died again, able to restart it and make it home before my engine died again. I took it to the shop and they told me that no codes could be pulled and that my car was shorting out due to my radiator and water pump. We replaced those and my thermostat and they said it should be fine. Drove the car about 15 miles or less and it died again. So I took it to the next shop and they could not tell me anything because it never died or acted up in their care. So they told me to drive it until it does it again. The damn thing died two blocks away from the shop. The guys at the shop told me to go fill up my gas tank and put fuel injector cleaner in it. I didn't have any problems making it home or to work the next day. I was headed to lunch the next day and it dies before I even leave the work parking lot. I drive home and it dies twice, all able to start right back up. I live maybe 5 minutes away from my job and my gas tank went from full to half a tank just by going to work and home. Today, I left work and made it a couple of blocks from home when it died and would not start back up!! I had to tow my car home. The Dodge house says its 150. 00 dollars to just pull the car into their bays and when it doesn't show codes or the engine light is not on, they can not do any thing further and send me on my way. They obviously have a problem with this death trap and they need to fix it.

This vehicle on numerous occasions shuts off while moving down the road. Started out only during slow speeds, but has started to do it while actually cruising down the road. No warning, just total loss off steering, brakes and engine. Luckily it has cranked back up and able to get out of the road. I also have had on several occasions the temperature gauge indicate that the engine was overheating and the car will just rev up and lose power. I have had everything checked (fluids, oil pump, radiator, plugs and wires etc) and find nothing wrong. Of course nothing will be wrong until the engine blows, which then can be fixed at my expense. Another problem to add to the list is the liftgate acuator stopped working which has made it impossible to open the rear hatch. The plastic gear in the motor is broke but you have to buy the whole part to fix it.