Plate grinding when turning motor by hand

[Detective Coating]

I just rebuilt my motor in my car, new bearings, rings, OEM used pistons, oem composite HG, brand spanking new head that was decked, 3 angle valve work, 3G lifters, Ferrea valves, stock cams. My issue is that I can not get the damned thing started again. I torqued everything to spec and triple checked everything. I got the car started for a minute after all was said and done and then it shut off which I expected since it wasn't tuned at all. Well I went to start it again and the starter grinded and it did it again the next few times I tried so I went and bought a brand new battery and a brand new starter. I made sure to get the AT starter from the parts store and now it's still grinding pretty bad and won't fire up. What in the world could I be doing wrong?

I have not tried to shim it and I didn't pull the trans, I simply rebuilt the motor while it was still in the car.

As of today I pulled the starter to spin the motor by hand and something is still catching when I turn the motor, some plate between the transmission and motor whether its the starter plate or the flexplate I'm not sure. I checked the ring gear and I can see where the starter was hitting when the gear came out on the teeth but it did not destroy any of the teeth whatsoever. It looks like a misalignment issue of some sort to me but why is the plate still grinding? Plugs are still in which makes it harder to turn but that has nothing to do with the plate noise. The only things I have had off in that area are the transfer case, oil pan and starter.

 

[ontario AWD]

Did you reuse the same flex plate that came off because i believe 6 bolt,early and later 7 bolt are different.Did you make sure tranny to block is sitting tight all the way around?The only other thing that comes to mind is if it's possible your flywheel bolts backed out when you fired it up.

 

[Detective Coating]

I guess you missed half of my description and didn't notice what section this was in. This is on an automatic so there is no flywheel.The transmission was not off of the car at all and all of the transmission bolts are on there tight.

I just got under the car and the lower inspection plate is getting grinded and pushed out on the backside of the motor, any ideas of what that could be? I have it in neutral when doing so obviously so I can turn the motor over. Transfer case too tight? Some foreign object fell in there?

Finally got it all off, fawking inspection plate was what was holding it up. Didn't do any damage from what I can see. It looks like the bolt came loose on the back side and got caught on the torque converter. Motor spins fine now so I should be able to get it running next time I'm home

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This is what I am working in!:

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[VETDRMS]

Are you certain the converter is seated all the way in the transmission? It is possible to get it hung up on the pump gear. When the converter is unbolted from the flexplate you should have a 1/8-1/4" gap between the flexplate mounting pads and the converter if it is seated all the way into the transmission. If the converter is tight and you can't rotate it easily by hand (when unbolted from the flexplate) it is not engaged all the way.

If that is the issue and it was started like this you will most likely need a new pump and have the converter hub cleaned up as it usually makes quick work of the pump gear.

I highly suggest you support the car better than the picture you have above.

Good luck.