ok guys help me figure this thing out im getting really fustrated and its making jeep look bad and thats not something i want to happen:
i bought these parts for it:
1 junkyard engine to replace the blown one
2 new brakes and rotors
3 new spark plugs
4 new coil
5 new cap and rotor
6 new spark plug wires
7 new water pump
8 new radiator
9 new crank positioning sensor

** cant complian i paid $400.00 for this jeep and i knew it had engine issues!

i rencently fix the problem of it stalling and not wanting to start up right turns out all i needed was a crank positiong sensor

just when i thought it was going good and i could put some money into actully fixing it up the thing had a overheating disaster!!!
that turned out to be the water pump

now my jeep is making a loud scaping noise that gets louder when its gets put in gear netural is not as bad but you still hear it i pretty much know it is coming from the transsmission but my dad said it sounds like its low on oil and its comming from the engine after crawelen underneath the running jeep in park i still say its comming from the automatic transmission  i wish it wasent doing anything at all i would be satisfied any ideas on the noise?? the thing is this noise started after i fied the crank positioning sensor i dont know if i screwed something up but i dont know how i would manage that its just 2 bolts