Transmisson wont shift into high gear

could be far too many things to list.
Timing belt/chain, fuel pump, fuel pump relay, coil packs, plug wires, blown head gasket, etc. Need way more detail here.

I'll answer your other question first - there is no fuel pump shut-off switch on a Dodge.
Yes you may have blown the engine. It may now have a blown head gasket, or a broken timing belt, or various other things.
Someone will need to check compression next, and the condition of the timing belt.
I should tell you the water pump is driven by the timing belt, so if the pump failed, it probably took the timing belt with it.

Did the timing belt break? Are you 100% that it is "in time" correctly? Does it spin over effortlessly? If so,do a compression check,and make sure you dont have any bent/broken valves,or blown head gasket.

have the fault codes read first
if the transmission oil has not been changed , that would be a good move after reading the fault codes

Check intake, compression, ignition, exhaust & vacuum. If the intake &/or the exhaust is blocked/clogged it won't run.
If the radiator acts like old faithful while you crank it, it has a blown head gasket, cracked head & or a cracked block.
If the radiator is dry or has very little in it, check the oil & the exhaust for antifreeze/water.
If you find antifreeze/water in the oil &/or the exhaust, it has a blown head gasket or cracked head/block.
Check the compression. If water/antifreeze shoots out of the spark plug holes (take all the spark plugs out for the compression test) during the compression test, it has a blown head gasket &/or a cracked head/block.
Check the ignition w/a spark plug tester that you can buy at parts stores for $10 or less. Some of them you just hold the tip close to the plug wire or touch the rubber boot on the spark plug so the tester can pick up the pulse from the wire/plug via induction. Others are put in line between the plug wire & plug.
Unplug the computer connectors & check for corrosion. You can clean them by plugging/unplugging the connectors multiple times or maybe you can use a small piece of emery cloth or an emery board. Make sure to blow any dust out of the connector.
Check the vacuum hoses. All hoses on a vehicle get brittle & crack w/age, then they leak. Use a vacuum gage to check vacuum.
I hope that you find the solution & get your Ford running again.

Blown head gasket. Do a compression test on #1 cylinder.

not the computer you have engine problems ,head gasket blown , water pump , something in these area need start checking one by one.

If you plugged the original leak (which sounds like the head gasket) and then the radiator was leaking, and you are having water coming out of the exhaust, then you need to replace the head gaskets. It sounds like you had a blown head gasket from the start. Here's what to do.

1. Replace the head gaskets (will need intake manifold gasket as it need to come off for this procedure).

2. Replace thermostat, radiator cap (if radiator is still good)

3. Replace water pump; the water pump may have stopped working (mechanical), which in turn caused the pressure to build an blow the head gasket (the cause of the pump would be a bad thermostat. If the truck was overheating, then the thermostat was bad to begin with, then the pump, then the head gasket, so then the only place left for the water to go is out the exhaust.

Here is a list of replacements:

^ water pump
^ thermostat
^ head gaskets
^ valve cover gaskets
^ radiator cap (if radiator is good)
^ radiator : if leak from cap caused any damage to radiator (should still be good)

**Also check the radiator hoses to ensure they do not have any "bubbles". Hot water over time (with anti-freeze) erodes the inside of the hoses, and begins to "dig" holes and grooves in the hose, which evetually cause leaks. Consider replacing these as well for safe measure.

Please, let me know if you need further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

sounds like a clogged fuel filter. you need to have the engine pressure checked for leaks, you can rent the pressure checker at autozone, it connects to ur radiator and u pump pressure into the cooling system if u find water leaking around the head u know u have a blown head gasket. if ok then check the cylinder compression should beable to rent this also. it screws into the spark plug holes has a gauge on it. alternator problem w/ the light is probaly you need to tighten the belt.hope this helps!!!

You have either a blown head gasket, a cracked block or a cracked head. The head has to be removed to fix the cheapest problem, the head gasket so, make sure the block & head get checked too.