Help with 4.0L

[redneckfordf2502002]

Ok recently I picked up 2 trucks. One is a 94 Explorer 4x4 4.0L V6 the other is a 92 ranger 4x4 4.0L V6. Both have good transmissions I have driven both.
The explorer supposedly had a locked up engine I never checked it while in the truck or anything so I pulled the engine from the ranger and dropped it into the explorer. While the old explorer engine was out I tried to turn the engine over and it did no problems. I soon found out the starter from the explorer was seized.
I go the engine I put in the explorer to run great now I want to get the 4.0L running to have another ranger.

So I put the 4.0L from the explorer into the rangers chassis (bolted up and everything) and went to turn it over today with no starter and by hand with a breaker bar and it won't turn at all.

I don't understand it how could it not be turning over while in the engine?
Could the torque convertor be locked up?
It is bolted up and went together smooth so I don't see how it could be something else but I don't know.
I put the plug for the camshaft position sensor in the engine I am trying to turn over could it be causing the problem? Again don't see how but is possible. When I had turned it over it had the camshaft position sensor in the engine which I took out to put into the explorer. When the plug was in the new explorers engine it turned over fine.

I just don't understand it. Any help would be greatly appreciated.
Trav

 

[RonD]

Just to confirm the crank will not turn in either direction?

And flexplate was on engine when you could turn it?

Yes, seized syncro(CPS) and/or Oil Pump would prevent crank from turning, remove it and try turning.
You probably would have noticed if syncro wouldn't turn before you put it in, so probably oil pump, after syncro is out try turning oil pump manually

 

[redneckfordf2502002]

Correct I tried to turn it either way and it just loosened the bolt. So I tightened it back up.

Flex plate was as I left the torque convertor on when I pulled it out.

This is what the engine looked like when I pulled it out. This isn't the one I am getting to turn over this is the one I put in the explorer but I pulled the same stuff out and it is the same.
Trav

 

[redneckfordf2502002]

any help please??
Trav

 

[cp2295]

are You Sure Things In The driveTrain Aren't Locked Up?

 

[RonD]

You did remove the torque converter and install it on the trans input shaft FIRST, to line up and lock in the trans Front Pump.
If you didn't and just bolt trans to block then you have broken the front pump(main pump) in the trans and that is why it is locked up.

You will need to rebuild the trans to fix it

 

[redneckfordf2502002]

Yes I am sure as I drove the truck multiple times.

Ron I dropped it in as a whole just like the pic. I did the same with my explorer and it is running and driving great how could the ranger go wrong when I didn't have even the cab on the chassis to hold me up.
Trav